J/AJ/147/85 Solar neighborhood. XXXIII. 45 M dwarfs (Riedel+, 2014)
The solar neighborhood. XXXIII. Parallax results from the CTIOPI 0.9 m program:
trigonometric parallaxes of nearby low-mass active and young systems.
Riedel A.R., Finch C.T., Henry T.J., Subasavage J.P., Jao W.-C., Malo L.,
Rodriguez D.R., White R.J., Gies D.R., Dieterich S.B., Winters J.G.,
Davison C.L., Nelan E.P., Blunt S.C., Cruz K.L., Rice E.L., Ianna P.A.
<Astron. J., 147, 85 (2014)>
=2014AJ....147...85R 2014AJ....147...85R
ADC_Keywords: Associations, stellar ; Stars, dwarfs ; Stars, M-type ;
Stars, nearby ; Photometry, VRI ; Spectral types ;
Parallaxes, trigonometric ; Proper motions ; Radial velocities ;
Stars, distances ; Positional data ; Velocity dispersion ;
Space velocities ; Equivalent widths ; Stars, ages
Keywords: open clusters and associations: general - parallaxes -
solar neighborhood - stars: low-mass - stars: pre-main sequence
Abstract:
We present basic observational data and association membership
analysis for 45 young and active low-mass stellar systems from the
ongoing Research Consortium On Nearby Stars photometry and astrometry
program at the Cerro Tololo Inter-American Observatory. Most of these
systems have saturated X-ray emission (log(LX/Lbol)>-3.5) based on
X-ray fluxes from the ROSAT All-Sky Survey, and many are significantly
more luminous than main-sequence stars of comparable color. We present
parallaxes and proper motions, Johnson-Kron-Cousins VRI photometry,
and multiplicity observations from the CTIOPI program on the CTIO 0.9m
telescope. To this we add low-resolution optical spectroscopy and line
measurements from the CTIO 1.5m telescope, and interferometric binary
measurements from the Hubble Space Telescope Fine Guidance Sensors. We
also incorporate data from published sources: JHKS photometry from
the Two Micron All Sky Survey point source catalog, X-ray data from
the ROSAT All-Sky Survey, and radial velocities from literature
sources. Within the sample of 45 systems, we identify 21 candidate
low-mass pre-main-sequence members of nearby associations, including
members of β Pictoris, TW Hydrae, Argus, AB Doradus, two
ambiguous ~30Myr old systems, and one object that may be a
member of the Ursa Major moving group. Of the 21 candidate young
systems, 14 are newly identified as a result of this work, and six of
those are within 25pc of the Sun.
Description:
The sample of 45 star systems in this paper was drawn from the
hundreds of targets in the Cerro Tololo Inter-American Observatory
Parallax Investigation (CTIOPI) target list. This is the 13th paper
publishing parallax results from the ongoing CTIOPI program (Jao et
al., 2003AJ....125..332J 2003AJ....125..332J; Jao et al., 2005AJ....129.1954J 2005AJ....129.1954J; Costa et
al., 2005AJ....130..337C 2005AJ....130..337C; Costa et al, 2006AJ....132.1234C 2006AJ....132.1234C; Henry et
al., 2006AJ....132.2360H 2006AJ....132.2360H; Subasavage et al., 2009AJ....137.4547S 2009AJ....137.4547S;
Riedel et al., 2010AJ....140..897R 2010AJ....140..897R; Jao et al., 2011AJ....141..117J 2011AJ....141..117J;
Boyd et al. 2001, cat. J/AJ/142/10) at the CTIO 0.9m telescope. The
targets in this paper are all nearby bright M dwarfs Among the 45
systems considered here, we have individual photometry and astrometry
of 51 components, because six of our star systems contain binaries
with separations more than 1''.
All CTIOPI photometry is conducted with the CTIO 0.9m telescope,
initially (1999-2003) under the NOAO Survey Programs grant; later
(2003-present) via the SMARTS Consortium. Photometry is conducted in
three filters (Tektronix 2 VRI), utilizing only the central quarter
(6.8*6.8' FOV, 401mas/pixel) of the Tektronics 2046*2046 CCD. These
values are then transformed to standard Johnson/Kron-Cousins
VJRKCIKC (the central wavelengths for VJ, RKC, and IKC are
5475, 6425, and 8075Å, respectively) photometry. The resulting
photometry can be found in Table 2. Further details of the observation
and reduction procedures can be found in Jao et al.
(2005AJ....129.1954J 2005AJ....129.1954J) and Winters et al. 2011 (cat. J/AJ/141/21).
CTIOPI astrometry is carried out using the same telescope and camera
configuration as that used for photometry but uses only one filter for
each object. Between 2005 March and 2009 September, a different V-band
filter was used for astrometric and photometric observations.
Additional details of CTIOPI observing procedures can be found in Jao
et al. (2005AJ....129.1954J 2005AJ....129.1954J; Paper XIII), Henry et al.
(2006AJ....132.2360H 2006AJ....132.2360H; Paper XVII), and other papers in this series.
Four of the objects in this paper (BD-21°1074BC, SCR 0613-2742AB,
L 449-1AB, and SCR 2010-2801AB) were selected for their X-ray
brightness and observed with the Hubble Space Telescope's (HST's) Fine
Guidance Sensors (FGSs) in Cycle 16B, in proposal 11943/11944
("Binaries at the Extremes of the H-R Diagram") using the F583W filter
(the bandpass of the F583W filter is shown here:
http://www.stsci.edu/hst/fgs/design/filters, checked 2013 June 4) with
no pupil.
Spectroscopic observations of all the resolved objects in this paper
(except SCR 0613-2742AB) were carried out between 2003-2006 and
2009-2011 using the CTIO 1.5m telescope under the aegis of the SMARTS
Consortium. The CTIO 1.5m Richey-Chretien Spectrograph (RCSpec) was
used with the 32/I grating setting, covering 6000-9600Å at a
resolution of 8Å.
We obtained spectra of SCR 0613-2742AB with the CTIO 4.0m telescope's
RCSpec on 2008 September 18 and 2008 September 19 using the KPGLF-1
(632g/mm) grating, which covers 4900-8050Å at a resolution of
1.9Å/pixel.
One spectrum of SCR 0613-2742AB was taken with the FEROS spectrograph
on the MPG 2.2m telescope at La Silla Observatory on 2013 February 18
as part of ESO program 090.C-0200(A). FEROS is an echelle spectrograph
fed by two 2.0'' fibers and provides R∼48000 spectra over a wavelength
range of 3500-9200Å.
SCR 1425-4113AB was observed on the Canada-France-Hawaii Telescope
(CFHT) with the ESPaDOnS. ESPaDONs was used in the "star+sky" mode, to
get a resolving power of R=68000 covering 3700-10500Å over 40
grating orders.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table2.dat 147 51 Photometric results
table3.dat 147 51 Astrometric results
table4.dat 118 52 Data used to calculate UVWXYZ
table5.dat 59 72 Deblended magnitudes for isochrones
table6.dat 67 50 Photometric and spectroscopic properties
table7.dat 134 45 Young star results
table8.dat 96 13 Nearby young associations (NYA)
table9.dat 94 54 UVWXYZ kinematics
table10.dat 100 28 Multiple star parameters
refs.dat 72 34 References
notes.dat 2486 24 Notes
--------------------------------------------------------------------------------
See also:
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
IX/29 : ROSAT All-Sky Survey Faint Source Catalog (Voges+ 2000)
IX/10 : ROSAT All-Sky Bright Source Catalogue (1RXS) (Voges+ 1999)
III/198 : Palomar/MSU nearby star spectroscopic survey (Hawley+ 1997)
I/238 : Yale Trigonometric Parallaxes, Fourth Edition (van Altena+ 1995)
J/AJ/147/94 : Solar neighborhood. XXXII. L and M dwarfs (Dieterich+, 2014)
J/ApJ/762/88 : Young stellar kinematic group candidate members (Malo+, 2013)
J/AJ/144/64 : Solar neighborhood. XXVIII. Substellar companions
(Dieterich+, 2012)
J/AJ/143/134 : Candidate members of B Pic /AB Dor groups (McCarthy+, 2012)
J/AJ/143/80 : Low-mass member candidates of B Pic & AB Dor (Schlieder+, 2012)
J/ApJ/758/56 : Young M dwarfs within 25pc. II. Kinematics (Shkolnik+, 2012)
J/AJ/142/92 : New proper motion stars with pm≥0.18''/yr (Boyd+, 2011)
J/A+A/531/A92 : Deep all-sky census of the Hyades (Roeser+, 2011)
J/AJ/142/10 : New proper motion stars 0.40''/yr>pm≥0.18''/yr (Boyd+, 2011)
J/AJ/141/21 : CCD distance estimates of SCR targets (Winters+, 2011)
J/AJ/140/119 : BPic and AB Dor moving groups members (Schlieder+, 2010)
J/A+A/499/129 : Old MS stars in young moving groups (Lopez-Santiago+, 2009)
J/ApJ/699/649 : Young M dwarfs within 25pc. I. (Shkolnik+, 2009)
J/AJ/134/252 : New nearby white dwarf systems (Subasavage+, 2007)
J/AJ/133/2898 : New proper-motion stars (-90<DE < -47) (Finch+, 2007)
J/AJ/132/866 : New M dwarfs in solar neighborhood (Riaz+, 2006)
J/A+A/460/695 : Search for Associations Containing Young stars (Torres+, 2006)
J/AJ/130/1658 : New high proper motion stars (-47<DE< -00) (Subasavage+, 2005)
J/AJ/129/413 : New high proper motion stars (-90<DE< -47) (Subasavage+, 2005)
J/other/ARA+A/42.685 : Young stars near the Sun (Zuckerman+, 2004)
J/AJ/123/3356 : PMSU nearby star spectroscopic survey. III. (Gizis+, 2002)
http://www.astro.gsu.edu/~thenry/CTIOPI/index.htm : CTIOPI
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1 A1 --- f_Name [P] 'P' for previously CTIOPI published star (G1)
3- 17 A15 --- Name Name of the star system
19- 21 A3 --- m_Name Component identification
23- 35 A13 --- OName Other name
37- 41 F5.2 mag Vmag [10.36/19.95]? Johnson V band magnitude (1)
43- 46 F4.2 mag e_Vmag ? Error in Vmag (2)
48- 52 F5.2 mag Rmag [9.08/17.99]? Kron-Cousins R band magnitude (1)
54- 57 F4.2 mag e_Rmag ? Error in Rmag (2)
59- 63 F5.2 mag Imag [7.4/15.92]? Kron-Cousins I band magnitude (1)
65- 68 F4.2 mag e_Imag ? Error in Imag (2)
70 I1 --- Np [2/5]? Number of photometric observations
72 A1 --- Flt [VRI] Parallax filter (V, R, or I)
74- 78 F5.3 mag sigma The σ scatter total value in magnitude (3)
80- 81 I2 --- Nn [7/31] Number of rel. nights
83- 85 I3 --- Nf [31/181] Number of frames
87- 91 F5.2 mag Jmag [5.81/13]? 2MASS J band magnitude (cat. II/246)
93- 96 F4.2 mag e_Jmag ? Error in Jmag (from cat. II/246)
98-102 F5.2 mag Hmag [5.2/12.39]? 2MASS H band magnitude (cat. II/246)
104-107 F4.2 mag e_Hmag ? Error in Hmag (from cat. II/246)
109-113 F5.2 mag Kmag [4.9/11.95]? 2MASS Ks band magnitude (cat. II/246)
115-118 F4.2 mag e_Kmag ? Error in K mag (from cat. II/246)
120-125 A6 --- SpT Spectral type (4)
126 A1 --- f_SpT [J] Joint spectral types from unresolved multiples
128-129 I2 --- r_SpT ? Reference for SpT; in refs.dat file
131-135 F5.2 pc Dist [2.77/47.39]? Photometric distance (5)
137-140 F4.2 pc e_Dist [0.43/7.47]? Error in Dist
142-143 I2 --- Nrel [12/12]? Number of relations
145-147 A3 --- Note Note (G2)
--------------------------------------------------------------------------------
Note (1): The central wavelengths for Vmag, Rmag, and Imag are 5475, 6425, and
8075Å, respectively.
Note (2): Combine the Poisson errors, errors on the nightly calibration fit, and
standard deviation of multiple nights of photometry (see column Np).
Generally, the latter is the greatest contributor to the collective error,
particularly when the star is active, as these stars are.
Note (3): Relative photometry (for variability studies) comes from our parallax
pipeline. With multiple nights of data in the filter used for parallax, we
use the methods in Honeycutt (1992PASP..104..435H 1992PASP..104..435H) to derive the nightly
offsets and zero points for relative instrumental photometry (Jao et al.
2008AJ....136..840J 2008AJ....136..840J) to derive stellar variability.
Note (4): Spectral types were determined by direct comparison to previously
obtained standard stars (Paper VI, Henry et al., 2002AJ....123.2002H 2002AJ....123.2002H)
spectra. See Section 3.4.1 for more details.
Note (5): Derived from the mean of the distance moduli implied by the absolute K
magnitudes and the 2MASS apparent K magnitude.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1 A1 --- f_Name [P] 'P' for previously CTIOPI published star (G1)
3- 17 A15 --- Name Name of the star system
19- 21 A3 --- m_Name Component identification
23- 24 I2 h RAh Hour of Right Ascension (J2000) (6)
26- 27 I2 min RAm Minute of Right Ascension (J2000) (6)
29- 33 F5.2 s RAs Second of Right Ascension (J2000) (6)
35 A1 --- DE- Sign of the Declination (J2000) (6)
36- 37 I2 deg DEd Degree of Declination (J2000) (6)
39- 40 I2 arcmin DEm Arcminute of Declination (J2000) (6)
42- 45 F4.1 arcsec DEs Arcsecond of Declination (J2000) (6)
47 A1 --- Filt [VRI] Parallax filter (V, R, or I)
49- 50 I2 --- Ns [3/11]? Number of seasons observed (counts of
observing semesters where a dataset was taken)
51 A1 --- n_Ns [cs] Coverage (c=continuous, more than one
night of data in all seasons; s=scattered)
53- 55 I3 --- Nu [41/181]? Total number of images used in
reduction
57- 63 F7.2 yr Date0 [1999.62/2010.66]? Starting date of observation
(first data point)
64 A1 --- --- [-]
65- 71 F7.2 yr Date1 [2003.86/2013.39]? Ending date of observation
(last data point)
73- 77 F5.2 yr Ny [2.04/13.32]? Number of years (from the first to
last data point)
79- 80 I2 --- Nr [5/14]? Number of reference stars used to reduce
the parallax
82- 87 F6.2 mas plxR [10.5/189.43]? Relative trigonometric parallax
89- 92 F4.2 mas e_plxR ? Error in plxR
94- 97 F4.2 mas Delta [0.4/2.72]? Correction on relative parallax (7)
99-102 F4.2 mas e_Delta ? Error in Corr
104-109 F6.2 mas plxA [11.66/190.93]? Absolute trigonometric parallax
111-114 F4.2 mas e_plxA ? Error in plxA
116-120 F5.1 mas/yr pm [11.2/769.1]? Proper motion
122-124 F3.1 mas/yr e_pm ? Error in pm
126-130 F5.1 deg pmPA ? Proper motion position angle
132-136 F5.2 deg e_pmPA ? Error in pmPA
138-141 F4.1 km/s Vtan [1.6/68.4]? Tangential velocity
143 I1 --- Ref ? Reference for previously published example;
in refs.dat file
145-147 A3 --- note Note(s) (G2)
--------------------------------------------------------------------------------
Note (6): Each target's coordinates were extracted from 2MASS (cat. II/246) and
then transformed to epoch 2000 using the proper motions and position angles
listed here.
Note (7): Parallaxes were corrected to absolute values using the mean of the
photometric distances to the reference stars, with a typical correction of
1.5±0.5mas.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 15 A15 --- Name Name of the star system
17- 19 A3 --- m_Name Component identification
21- 22 I2 h RAh Hour of Right Ascension (J2000) (1)
24- 25 I2 min RAm Minute of Right Ascension (J2000) (1)
27- 32 F6.3 s RAs Second of Right Ascension (J2000) (1)
34- 36 I3 mas e_RAs Error in Right Ascension (J2000) (1)
38 A1 --- DE- Sign of the Declination (J2000) (1)
39- 40 I2 deg DEd Degree of Declination (J2000) (1)
42- 43 I2 arcmin DEm Arcminute of Declination (J2000) (1)
45- 49 F5.2 arcsec DEs Arcsecond of Declination (J2000) (1)
51- 53 I3 mas e_DEs Error in Declination (J2000) (1)
55- 60 F6.2 mas plx Absolute trigonometric parallax π (2)
62- 65 F4.2 mas e_plx Error in plx
67- 77 A11 --- r_plx Reference for parallax; in refs.dat file
79- 84 F6.1 mas/yr pmRA Proper motion in Right Ascension
(µR.A.cos decl.)
86- 89 F4.1 mas/yr e_pmRA Error in pmRA
91- 96 F6.1 mas/yr pmDE Proper motion in Declination (µdecl.)
98-100 F3.1 mas/yr e_pmDE Error in pmDE
102 I1 --- r_pmDE Reference for proper motion (pmRA and pmDE);
in refs.dat file
104-109 F6.2 km/s HRV ? Heliocentric radial velocity
111-115 F5.2 km/s e_HRV ? Error in HRV
117-118 I2 --- r_HRV ? Reference for HRV; in refs.dat file
--------------------------------------------------------------------------------
Note (1): All positions and position errors are taken from 2MASS (cat. II/246),
and adjusted to epoch 2000.0 equinox J2000 using the proper motions listed
here.
Note (2): Parallaxes of multiple components in the same system have been
combined, and are represented by duplicate references.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table5.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 15 A15 --- Name Name of the star system
17 A1 --- m_Name Component identification
19- 23 F5.2 mag Vmag Deblended Johnson V band magnitude
25- 29 F5.2 mag Imag Deblended Kron-Cousins I band magnitude
31- 35 F5.2 mag Jmag Deblended 2MASS J band magnitude
37- 41 F5.2 mag Kmag Deblended 2MASS Ks band magnitude
43- 47 F5.2 mag VMag Deblended absolute Johnson V band magnitude
49- 53 F5.2 mag V-K Deblended (V-K) color index
55- 56 A2 --- Band Band of known Δmag used to deblend the
photometry (K, R, V, or i') (1)
58- 59 A2 --- SB Indicates if the system was identified only as
a spectroscopic binary
--------------------------------------------------------------------------------
Note (1): No entry is given for single stars because deblending is not required.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table6.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 15 A15 --- Name Name of the star system
17- 19 A3 --- m_Name Component identification
21- 25 F5.2 mag VMag Absolute Johnson V band magnitude
27- 30 F4.2 mag V-K The (V-Ks) color index
32 A1 --- l_log(LX/Lbol) [<] Upper limit flag on log(LX/Lbol)
33- 37 F5.2 [-] log(LX/Lbol) [-5.55/-2.2]? Log of X-ray to bolometric
luminosity ratio (1)
39 A1 --- f_logLX [<] Upper limit flag on logLX
40- 44 F5.2 erg/s logLX [26.14/29.86]? X-ray luminosity (1)
46 A1 --- Flt Filter (V, R, or I)
48- 52 F5.3 mag Dmag Photometric variability in Flt
54- 58 F5.1 0.1nm EWHa ? Hα equivalent width; in Å
60- 63 F4.2 --- NaI [1.08/1.35]? NaI index
65- 67 F3.1 0.1nm EWKI [0.5/5.6]? KI equivalent width; in Å
--------------------------------------------------------------------------------
Note (1): Using the cnts/s/arcmin2 for the nearest target (generally under 2'
distant) in the ROSAT All-Sky Survey catalog (RASS; Voges et al. 1999, cat.
IX/10; Voges et al. 2000, cat. IX/29) as the local background count rate.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table7.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 15 A15 --- Name Name of the star system
17- 19 A3 --- m_Name Component identification
21- 30 A10 --- KAsso Best-matching association (nearby young
association or Ursa Major moving group) from
kinematic method
32- 35 F4.2 --- KStat [0.06/3.87]? Goodness-of-fit statistic γ
to determine how significant is the kinematic
match (1)
37- 41 F5.1 km/s RV [-38.2/24.8]? Radial velocity
43 A1 --- f_RV [a] RV is actually a best-fit RV from the
kinematic fitting
45- 54 A10 --- BAsso BANYAN best-matching nearby young association (2)
56- 59 F4.1 % BProb [51.9/99.9] Probability for the star to be a
match for the BANYAN association
61- 75 A15 --- IRange Isochrone range
77- 82 A6 --- GMatch Match using gravity-sensitive lines (Old, Young)
84- 86 A3 --- f_GMatch [N/A] Not analysed
88 A1 --- l_Age [<>] Limit flag on Age
89- 91 F3.1 Gyr Age [1/7.5]? Hα age
93- 95 A3 --- f_Age [N/A] Not analysed
97 A1 --- u_NYA [?] Uncertainty flag on NYA
98-110 A13 --- NYA Name of the Nearby Young Association
(Unknown=Unknown association) (3)
112-116 A5 --- Ref References; in refs.dat file
118-134 A17 --- n_Ref Name of the association find in reference
--------------------------------------------------------------------------------
Note (1): We take a value of γ less than 4 as a potentially significant
match for the kinematic association (only the γ value for the most
consistent association is given here). See Section 4.1.2 and Equation (1)
for further details.
Note (2): BANYAN (Malo et al. 2013, cat. J/ApJ/762/88) is an independent
Bayesian methodology for finding young stars. BANYAN uses IJ photometry,
Baraffe et al. (1998, cat. J/A+A/337/403; 2002A&A...382..563B 2002A&A...382..563B) model
isochrones, and a slightly different set of UVWXYZ values for the known
associations. It searches for members of the known nearby associations
β Pictoris, TW Hydra, Tucana-Horologium, Columba, Carina, Argus, and
AB Doradus, with "Field" as the default hypothesis.
Note (3): In addition, there is one system (L 449-1 AB) kinematically consistent
with the Ursa Majoris moving group.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table8.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 17 A17 --- Name Name of the nearby association (1)
19 A1 --- f_Name Reference for the data (2)
21- 26 F6.2 km/s Uvel U space velocity component
28- 31 F4.2 km/s sUvel Velocity dispersion on Uvel σU (3)
33- 38 F6.2 km/s Vvel V space velocity component
40- 43 F4.2 km/s sVvel Velocity dispersion on Vvel σV (3)
45- 50 F6.2 km/s Wvel W space velocity component
52- 55 F4.2 km/s sWvel Velocity dispersion on Wvel σW (3)
57- 60 I4 pc Xpos ? Minimum X space position
62- 65 I4 pc XPos ? Maximum X space position
67- 72 F6.1 pc Ypos ? Minimum Y space position
74- 78 F5.1 pc YPos ? Maximum Y space position
80- 84 F5.1 pc Zpos ? Minimum Z space position
86- 90 F5.1 pc ZPos ? Maximum Z space position
92- 94 I3 Myr Age Age
96 A1 --- n_Age [ab] Origin of Age (4)
--------------------------------------------------------------------------------
Note (1): All data in this table (unless otherwise specified) from Torres et al.
(2008hsf2.book..757T 2008hsf2.book..757T).
Note (2): Reference defined as follows:
c = Dimensions Soderblom et al. (2005AJ....129.1616S 2005AJ....129.1616S), 13pc tidal radius Adams
et al. (2001AJ....121.2053A 2001AJ....121.2053A);
d = Barrado y Navascues (1998A&A...339..831B 1998A&A...339..831B);
e = King et al. (2003AJ....125.1980K 2003AJ....125.1980K);
f = Roser et al. 2011 (cat. J/A+A/531/A92).
Note (3): In the case of the association, the dispersion represent the intrinsic
dispersion of real members.
Note (4): Flag defined as follows:
a = Only these ages are known with any degree of certainty or corroboration;
b = Age from Luhman et al. (2005ApJ...628L..69L 2005ApJ...628L..69L).
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table9.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 15 A15 --- Name Name of the star system
17- 19 A3 --- m_Name Component identification
21- 26 F6.2 km/s Uvel ? U space velocity component (1)
28- 32 F5.2 km/s e_Uvel ? Error in Uvel
34- 39 F6.2 km/s Vvel ? V space velocity component (1)
41- 45 F5.2 km/s e_Vvel ? Error in Vvel
47- 52 F6.2 km/s Wvel ? W space velocity component (1)
54- 58 F5.2 km/s e_Wvel ? Error in Wvel
60- 65 F6.2 pc Xpos X space position (1)
67- 70 F4.2 pc e_Xpos Error in Xpos
72- 77 F6.2 pc Ypos Y space position (1)
79- 82 F4.2 pc e_Ypos Error in Ypos
84- 89 F6.2 pc Zpos Z space position (1)
91- 94 F4.2 pc e_Zpos Error in Zpos
--------------------------------------------------------------------------------
Note (1): These UVWXYZ coordinates are right-handed Cartesian Galactic
coordinates aligned so that the U/X axis is toward the galactic center, the
V/Y axis is in the direction of galactic rotation, and the W/Z axis is
toward the north Galactic pole.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table10.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 13 A13 --- Name Name of the star system
15- 16 A2 --- m_Name Primary component identification
18- 30 A13 --- SName Name of the star system
32- 33 A2 --- m_SName Secondary component identification
35- 42 F8.3 arcsec Sep ? Separation
44- 48 F5.1 deg PA ? Position angle
50 A1 --- f_PA [b] Indicates ambiguous sign on X-axis of solution
52- 53 I2 --- r_PA ? Reference for Sep and PA; in refs.dat file
55 A1 --- F1 [ac] Sep and PA estimated (1)
57- 60 F4.2 mag Dmag ? Delta magnitude Δmag
62- 68 A7 --- Phot Photometric system
70- 74 A5 --- Flt Name of filter in the system
76- 77 I2 --- r_Flt ? Reference for magnitude; in refs.dat file
79 A1 --- F2 [ac] Joined of estimated magnitude (1)
81 A1 --- l_Per [~<>] Limit or approximation flag on Per
82- 85 F4.1 --- Per ? Period
87 A1 --- f_Per Unit of the period (y=year, d=day)
89- 90 I2 --- r_Per ? Reference for period; in refs.dat file
92-100 A9 --- Obs Resolving observation (2)
--------------------------------------------------------------------------------
Note (1): Flag on reference defined as follows:
a = Relative to unresolved components;
c = estimate from PSF peaks.
Note (2): Resolving observations are defined as follows:
VB = Visual binary;
SB = Spectroscopic binary;
PB = Astrometric binary with perturbation in data from Cerro Tololo
Inter-American Observatory Parallax Investigation (CTIOPI);
AO = Resolved by AO;
LI = Resolved by Lucky Imaging;
SP = Resolved by Speckle Interferometry;
FGS = Resolved by Fine Guidance Sensor (FGS; on Hubble Space Telescope)
interferometry.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: refs.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 --- Ref Reference identifier
4- 22 A19 --- BibCode Bibliographic code
24- 49 A26 --- Aut Author's name
51- 72 A22 --- Com Comments
--------------------------------------------------------------------------------
Byte-by-byte Description of file: notes.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 13 A13 --- Name Name of the star system
15- 17 A3 --- m_Name Component identification
19-2486 A2468 --- Note Notes about the star
--------------------------------------------------------------------------------
Global notes:
Note (G1): In Cerro Tololo Inter-American Observatory Parallax Investigation
(CTIOPI; Jao et al., 2003AJ....125..332J 2003AJ....125..332J; Jao et al., 2005AJ....129.1954J 2005AJ....129.1954J;
Costa et al., 2005AJ....130..337C 2005AJ....130..337C; Costa et al, 2006AJ....132.1234C 2006AJ....132.1234C;
Henry et al., 2006AJ....132.2360H 2006AJ....132.2360H; Subasavage et al., 2009AJ....137.4547S 2009AJ....137.4547S;
Riedel et al., 2010AJ....140..897R 2010AJ....140..897R; Jao et al., 2011AJ....141..117J 2011AJ....141..117J;
Boyd et al. 2001, cat. J/AJ/142/10).
Note (G2): The notes are defined as follows:
b = Astrometric results and relative photometry include new V filter data.
Between 2005 March and 2009 September, a different V-band filter was used
for astrometric and photometric observations. While photometrically
identical to the original V filter, it exhibited slightly inferior
astrometric performance (Paper XXII, Riedel et al., 2010AJ....140..897R 2010AJ....140..897R);
c = No independent photometry;
d = Not using independent astrometry (see Section 5);
e = Astrometric perturbation was incorporated into the final astrometric fit;
f = Reference field was reddened, and a generic correction to absolute parallax
was adopted.
--------------------------------------------------------------------------------
History:
From electronic version of the journal
References:
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Kirkpatrick et al., Paper II 1995AJ....109..797K 1995AJ....109..797K
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Henry et al., Paper IV 1997AJ....114..388H 1997AJ....114..388H
Patterson et al., Paper V 1998AJ....115.1648P 1998AJ....115.1648P
Henry et al., Paper VI 2002AJ....123.2002H 2002AJ....123.2002H
Jao et al., Paper VII 2003AJ....125..332J 2003AJ....125..332J
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Henry et al., Paper XLIV 2018AJ....155..265H 2018AJ....155..265H, Cat. J/AJ/155/265
Winters et al., Paper XLV 2019AJ....157..216W 2019AJ....157..216W
(End) Sylvain Guehenneux [CDS] 22-Jan-2015