J/ApJ/762/88 Young stellar kinematic group candidate members (Malo+, 2013)
Bayesian analysis to identify new star candidates in nearby young stellar
kinematic groups.
Malo L., Doyon R., Lafreniere D., Artigau E., Gagne J., Baron F., Riedel A.
<Astrophys. J., 762, 88 (2013)>
=2013ApJ...762...88M 2013ApJ...762...88M
ADC_Keywords: Associations, stellar ; Stars, M-type ; Proper motions ;
Stars, distances ; Radial velocities ; Photometry, infrared ;
X-ray sources
Keywords: solar neighborhood; stars: low-mass; stars: pre-main sequence;
techniques: radial velocities
Abstract:
We present a new method based on a Bayesian analysis to identify new
members of nearby young kinematic groups. The analysis minimally takes
into account the position, proper motion, magnitude, and color of a
star, but other observables can be readily added (e.g., radial
velocity, distance). We use this method to find new young low-mass
stars in the β Pictoris and AB Doradus moving groups and in the
TW Hydrae, Tucana-Horologium, Columba, Carina, and Argus associations.
Starting from a sample of 758 mid-K to mid-M (K5V-M5V) stars showing
youth indicators such as Hα and X-ray emission, our analysis
yields 214 new highly probable low-mass members of the kinematic
groups analyzed. One is in TW Hydrae, 37 in β Pictoris, 17 in
Tucana-Horologium, 20 in Columba, 6 in Carina, 50 in Argus, 32 in AB
Doradus, and the remaining 51 candidates are likely young but have an
ambiguous membership to more than one association. The false alarm
rate for new candidates is estimated to be 5% for β Pictoris and
TW Hydrae, 10% for Tucana-Horologium, Columba, Carina, and Argus, and
14% for AB Doradus. Our analysis confirms the membership of 58 stars
proposed in the literature. Firm membership confirmation of our new
candidates will require measurement of their radial velocity
(predicted by our analysis), parallax, and lithium 6708Å equivalent
width. We have initiated these follow-up observations for a number of
candidates, and we have identified two stars (2MASSJ01112542+1526214,
2MASSJ05241914-1601153) as very strong candidate members of the
β Pictoris moving group and one strong candidate member
(2MASSJ05332558-5117131) of the Tucana-Horologium association; these
three stars have radial velocity measurements confirming their
membership and lithium detections consistent with young age.
Description:
We consider as bona fide members of young kinematic groups all stars
with a good measurement of trigonometric distance, proper motion,
Galactic space velocity and other youth indicators such as Hα
emission, X-ray emission, appropriate location in the HR diagram and
lithium absorption; those 177 stars are listed in Table 3.
For our search for new late-type members of young associations, we
used the sample of Riaz et al. (2006, Cat. J/AJ/132/866), which
consists of 1061 spectroscopically confirmed K5V-M5V dwarfs,
supplemented with 43 K5V-M5V young star candidates previously
identified in literature (see section 6 and table 5).
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table3.dat 204 177 Bona fide members of young kinematic groups
table4.dat 140 177 Membership probabilities of all bona fide members
table5.dat 174 290 Candidate members of young kinematic groups
refs.dat 113 71 References
--------------------------------------------------------------------------------
See also:
III/272 : RAVE 4th data release (Kordopatis+, 2013)
V/139 : The SDSS Photometric Catalog, Release 9 (Adelman-McCarthy+, 2012)
V/137 : Extended Hipparcos Compilation (XHIP) (Anderson+, 2012)
I/322 : UCAC4 Catalogue (Zacharias+, 2012)
I/317 : The PPMXL Catalog (Roeser+ 2010)
III/254 : 2nd Cat. of RVs with Astrometric Data (Kharchenko+, 2007)
I/311 : Hipparcos, the New Reduction (van Leeuwen, 2007)
III/252 : Pulkovo radial velocities for 35493 HIP stars (Gontcharov, 2006)
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
I/259 : The Tycho-2 Catalogue (Hog+ 2000)
IX/10 : ROSAT All-Sky Bright Source Catalogue (1RXS) (Voges+ 1999)
III/198 : Palomar/MSU nearby star spectroscopic survey (Hawley+ 1997)
I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)
J/ApJ/758/56 : Young M dwarfs within 25pc. II. Kinematics (Shkolnik+, 2012)
J/ApJ/754/44 : The AstraLux Large M-dwarf Survey (Janson+ 2012)
J/ApJ/752/56 : BDKP. III. Parallaxes for ultracool dwarfs (Faherty+, 2012)
J/AJ/144/8 : ∼100 G/K/M-type Sco-Cen complex members spec. (Song+, 2012)
J/AJ/143/80 : R Low-mass stars of beta Pic & AB Dor (Schlieder+, 2012)
J/ApJ/738/122 : ScoCen debris disks Around F- & G-type stars (Chen+, 2011)
J/A+A/520/A15 : RACE-OC project: YSOs within 100pc (Messina+, 2010)
J/A+A/514/A97 : HR spectra of Late-type stars (Lopez-Santiago+ 2010)
J/MNRAS/403/1949 : UBV(RcIc)JHK photometry of HIP nearby stars (Koen+, 2010)
J/AJ/140/119 : βPic & AB Dor moving groups members (Schlieder+, 2010)
J/AJ/137/4186 : UBVRI standards around celestial equator (Landolt, 2009)
J/A+A/508/833 : SACY III. Li abundances (da Silva+, 2009)
J/ApJ/699/649 : Young M dwarfs within 25pc. I. (Shkolnik+, 2009)
J/MNRAS/389/585 : Fundamental parameters of M dwarfs (Casagrande+, 2008)
J/A+A/480/735 : Young local stellar associations (Fernandez+, 2008)
J/AJ/133/2524 : Spectra of young nearby stars (White+, 2007)
J/PAZh/33/643 : Kinematics of Sco-Cen OB Association (Bobylev+, 2007)
J/A+A/460/695 : Associations Containing Young stars (Torres+, 2006)
J/AZh/83/821 : Orion Spiral Arm CAtalogue (OSACA) (Bobylev+, 2006)
J/AJ/132/866 : New M dwarfs in solar neighborhood (Riaz+, 2006)
J/A+A/433/151 : Spec. results on ROSAT late-type stars (Zickgraf+, 2005)
J/other/ARA+A/42.685 : Young stars near the Sun (Zuckerman+, 2004)
J/AJ/128/463 : A preliminary 20pc census from the NLTT cat. (Reid+, 2004)
J/AJ/126/3007 : Spectroscopy of faint red NLTT dwarfs (Reid+, 2003)
J/A+A/401/959 : 35 DENIS late-M dwarfs between 10 and 30pc (Phan-Bao+, 2003)
J/AJ/123/3356 : Palomar/MSU nearby star spec. survey. III. (Gizis+, 2002)
J/AJ/123/2806 : Nearby stars in the NLTT catalogue (Reid+, 2002)
J/MNRAS/334/20 : UBV(RI)c photometry of HIP red stars (Koen+, 2002)
J/MNRAS/328/45 : Late-type stars members of young groups (Montes+, 2001)
J/A+AS/137/451 : Radial velocities. IX. (Grenier+, 1999)
J/A+A/337/403 : Low-mass stars evolutionary models (Baraffe+ 1998)
Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 A5 --- YKG Young kinematic group abbreviation (G1)
7- 20 A14 --- Name Star name
22 A1 --- f_Name [a] Ambiguous membership (2)
24- 36 A13 --- SpT MK spectral type
38- 39 I2 h RAh Hour of right ascension (J2000)
41- 42 I2 min RAm Minute of right ascension (J2000)
44- 48 F5.2 s RAs Second of right ascension (J2000)
50 A1 --- DE- Sign of declination (J2000)
51- 52 I2 deg DEd Degree of declination (J2000)
54- 55 I2 arcmin DEm Arcminute of declination (J2000)
57- 60 F4.1 arcsec DEs Arcsecond of declination (J2000)
62- 68 F7.2 mas/yr pmRA [-604/280] Proper motion along RA
(µαcosδ) (3)
70- 74 F5.2 mas/yr e_pmRA [0.01/18] pmRA uncertainty (3)
76- 82 F7.2 mas/yr pmDE [-729/341] Proper motion along DE
(µδ) (3)
84- 88 F5.2 mas/yr e_pmDE [0.01/18] pmDE uncertainty (3)
90- 91 A2 --- r_pm Reference of proper motion (see refs.dat file)
93- 98 F6.2 km/s RV [-27/34] Radial velocity (4)
100-104 F5.2 km/s e_RV [0/20] RV uncertainty (4)
106-108 A3 --- r_RV Reference of RV (see refs.dat file)
110-115 F6.2 mas Plx [10/142] Parallax (3)
117-120 F4.2 mas e_Plx [0.09/7.4] Plx uncertainty (3)
122-124 A3 --- r_Plx Reference of Plx (see refs.dat file)
126-130 F5.2 mag Imag [1.7/17.1] Ic-band magnitude (5)
132-134 A3 --- r_Imag Reference of Imag (see refs.dat file)
136-140 F5.2 mag Jmag [1.8/13.6] J-band magnitude
142-145 F4.2 mag e_Jmag [0.02/1.1] Jmag uncertainty
147-148 A2 --- r_Jmag Reference of Jmag (see refs.dat file)
150-155 F6.2 [mW/m2] logFX [-13.2/-10.2]? Log of X-ray flux (6)
157-161 F5.1 km/s Uvel [-25/2.1] U component velocity
163-165 F3.1 km/s e_Uvel [0.1/7.2] Uvel uncertainty
167-171 F5.1 km/s Vvel [-31.3/-9] V component velocity
173-175 F3.1 km/s e_Vvel [0.1/7.1] Vvel uncertainty
177-181 F5.1 km/s Wvel [-18/6] W component velocity
183-186 F4.1 km/s e_Wvel [0.1/18.2] Wvel uncertainty
188-192 F5.1 pc X [-51/72] X galactic coordinate (toward center)
194-198 F5.1 pc Y [-86/46.5] Y galactic coordinate (rotation)
200-204 F5.1 pc Z [-61/32.5] Z coordinate above galactic plane
--------------------------------------------------------------------------------
Note (2):
a = Bona fide members with ambiguous membership; see Section 9.
Note (3): Proper motion and parallax measurement from van Leeuwen 2007
(Cat. I/311), unless flagged.
Note (4): Radial velocity measurement from Bailey et al. 2012ApJ...749...16B 2012ApJ...749...16B,
unless stated otherwise.
Note (5): Ic magnitude from Anderson & Francis 2012 (Cat. V/137), unless stated
otherwise.
Note (6): ROSAT X-ray flux calculated from Riaz et al. (2006, Section 5.4; see
Cat. J/AJ/132/866) in erg/s/cm2.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 A5 --- YKG Young kinematic group abbreviation (G1)
7- 20 A14 --- Name Star name
22- 23 I2 --- PPMG [0/99] β Pictoris moving group (bPMG)
membership probability
25 A1 --- f_PPMG [b] Binarity flag (1)
27- 28 I2 --- PvPMG [0/99] bPMG membership probability including
radial velocity information (Pv)
30 A1 --- f_PvPMG [b] Binarity flag (1)
32- 33 I2 --- PvpPMG [0/99] bPMG membership probability including
radial velocity and parallax (Pv+π)
35 A1 --- f_PvpPMG [b] Binarity flag (1)
37- 38 I2 --- PTWA [0/99] TW Hydrae Association (TWA)
membership probability
40 A1 --- f_PTWA [b] Binarity flag (1)
42- 43 I2 --- PvTWA [0/99] TWA membership probability including
radial velocity information (Pv)
45 A1 --- f_PvTWA [b] Binarity flag (1)
47- 48 I2 --- PvpTWA [0/99] TWA membership probability including
radial velocity and parallax (Pv+π)
50 A1 --- f_PvpTWA [b] Binarity flag (1)
52- 53 I2 --- PTHA [0/99] Tucana-Horologium Association (THA)
membership probability
55 A1 --- f_PTHA [b] Binarity flag (1)
57- 58 I2 --- PvTHA [0/99] THA membership probability including
radial velocity information (Pv)
60 A1 --- f_PvTHA [b] Binarity flag (1)
62- 63 I2 --- PvpTHA [0/99] THA membership probability including
radial velocity and parallax (Pv+π)
65 A1 --- f_PvpTHA [b] Binarity flag (1)
67- 68 I2 --- PCOL [0/99] Columba Association (COL)
membership probability
70 A1 --- f_PCOL [b] Binarity flag (1)
72- 73 I2 --- PvCOL [0/99] COL membership probability including
radial velocity information (Pv)
75 A1 --- f_PvCOL [b] Binarity flag (1)
77- 78 I2 --- PvpCOL [0/99] COL membership probability including
radial velocity and parallax (Pv+π)
80 A1 --- f_PvpCOL [b] Binarity flag (1)
82- 83 I2 --- PCAR [0/99] Carina Association (CAR)
membership probability
85 A1 --- f_PCAR [b] Binarity flag (1)
87- 88 I2 --- PvCAR [0/99] CAR membership probability including
radial velocity information (Pv)
90 A1 --- f_PvCAR [b] Binarity flag (1)
92- 93 I2 --- PvpCAR [0/99] CAR membership probability including
radial velocity and parallax (Pv+π)
95 A1 --- f_PvpCAR [b] Binarity flag (1)
97- 98 I2 --- PARG [0/99] Argus Association (ARG)
membership probability
100 A1 --- f_PARG [b] Binarity flag (1)
102-103 I2 --- PvARG [0/99] ARG membership probability including
radial velocity information (Pv)
105 A1 --- f_PvARG [b] Binarity flag (1)
107-108 I2 --- PvpARG [0/99] ARG membership probability including
radial velocity and parallax (Pv+π)
110 A1 --- f_PvpARG [b] Binarity flag (1)
112-113 I2 --- PABD [0/99] AB Doradus Moving Group (ABDMG)
membership probability
115 A1 --- f_PABD [b] Binarity flag (1)
117-118 I2 --- PvABD [0/99] ABD membership probability including
radial velocity information (Pv)
120 A1 --- f_PvABD [b] Binarity flag (1)
122-123 I2 --- PvpABD [0/99] ABD membership probability including
radial velocity and parallax (Pv+π)
125 A1 --- f_PvpABD [b] Binarity flag (1)
127-128 I2 --- PFld [0/99] Field membership probability
130 A1 --- f_PFld [b] Binarity flag (1)
132-133 I2 --- PvFld [0/99] Field membership probability including
radial velocity information (Pv)
135 A1 --- f_PvFld [b] Binarity flag (1)
137-138 I2 --- PvpFld [0/99] Field membership probability including
radial velocity and parallax (Pv+π)
140 A1 --- f_PvpFld [b] Binarity flag (1)
--------------------------------------------------------------------------------
Note (1):
b = Membership probability (P or Pv or Pv+π) for which the binary
hypothesis has a higher probability.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table5.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 A5 --- YKG Young kinematic group abbreviation (G1)
7- 23 A17 --- 2MASS 2MASS name (JHHMMSSss+DDMMSSs)
25- 29 F5.2 mag Icmag [6.7/13.3] Ic-band magnitude (1)
31- 34 F4.2 mag e_Icmag [0/0.2] Icmag uncertainty (1)
36- 37 A2 --- r_Icmag Icmag reference (see refs.dat file)
39- 43 F5.2 mag Jmag [5.7/11.5] 2MASS J-band magnitude
45- 48 F4.2 mag e_Jmag [0.02/0.04] Jmag uncertainty
50- 56 F7.2 mas/yr pmRA [-552.7/350] Proper motion along RA
(µαcosδ) (2)
58- 62 F5.2 mas/yr e_pmRA [0/13] pmRA uncertainty (2)
64- 65 A2 --- r_pmRA Reference for pmRA (see refs.dat file)
67- 73 F7.2 mas/yr pmDE [-276/387.1] Proper motion along DE
(µδ) (2)
75- 79 F5.2 mas/yr e_pmDE [0/32] pmDE uncertainty (2)
81- 82 A2 --- r_pmDE Reference for pmDE (see refs.dat file)
84- 93 A10 --- SpT MK spectral type
95-100 F6.2 [mW/m2] logFX ? Log of X-ray flux (3)
102-105 F4.1 0.1nm Ha [-2/60]? Hα equivalent width (4)
107-108 A2 --- r_Ha Reference for Ha (see refs.dat file)
110-113 I4 0.1pm Li [-100/710]? Lithium equivalent width (5)
115-116 A2 --- r_Li Reference for Li (see refs.dat file)
118-122 F5.1 km/s RVm [-56.5/36.4]? Radial velocity measurement (6)
124-126 F3.1 km/s e_RVm [0/5.3]? RVm uncertainty (6)
128-129 A2 --- r_RVm Reference for RVm (see refs.dat file)
131-135 F5.1 km/s RVp [-31/31.3]? Radial velocity predicted (7)
137-139 F3.1 km/s e_RVp [0.5/3]? RVp uncertainty (7)
141-145 F5.1 pc Dp [7.9/167.5]? Trigonometric distance (8)
147-150 F4.1 pc e_Dp [0.1/29.5]? Dp uncertainty (8)
152-153 A2 --- r_Dp Reference for Dp (see refs.dat file)
155-156 I2 pc Ds [3/97]? Statistical distance (7)
158-159 I2 pc e_Ds ? Ds uncertainty (7)
161-164 F4.1 % Mm [0/99.9]? Membership probability (9)
166 A1 --- f_Mm [j] j: membership probability for which the
binary hypothesis is higher
168-174 A7 --- Ref Reference(s) (see refs.dat file)
--------------------------------------------------------------------------------
Note (1): Icmag from the DENIS catalog (Epchtein et al. 1997Msngr..87...27E 1997Msngr..87...27E),
unless stated otherwise.
Note (2): Proper motion from the UCAC3 catalog (Zacharias et al.
2009, Cat. I/315; superseded by I/322), unless stated otherwise.
Note (3): ROSAT X-ray flux calculated from Riaz et al. (see 2006,
Cat. J/AJ/132/866, section 5.4) in erg/s/cm2.
Note (4): Hα equivalent width from Riaz et al. (2006, Cat. J/AJ/132/866),
unless stated otherwise.
Note (5): Lithium EW from Mentuch et al. (2008ApJ...689.1127M 2008ApJ...689.1127M), unless
stated otherwise. Negative value means lower limit on the lithium EW.
Note (6): Radial velocity measurement from Montes et al. (2001,
Cat. J/MNRAS/328/45), unless stated otherwise
Note (7): Radial velocity and statistical distance derived by our analysis
(see Section 5).
Note (8): Trigonometric distance from van Leeuwen (2007, Cat. I/311),
unless stated otherwise
Note (9): Membership probability without considering the RV or parallax
information (see Section 5).
--------------------------------------------------------------------------------
Byte-by-byte Description of file: refs.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 A3 --- Ref Reference code
5- 23 A19 --- BibCode Bibcode
25- 47 A23 --- Aut Author's name(s)
49-113 A65 --- Comm Comment
--------------------------------------------------------------------------------
Global notes:
Note (G1): Young kinematic group as follows:
TWA = TW Hydrae, 8-20Myr, 28-92pc (10 stars)
bPMG = β Pictoris, 12-22Myr, 9-73pc (39 stars)
THA = Tucana-Horologium, 10-40Myr, 36-71pc (44 stars)
COL = Columba, 10-40Myr, 35-81pc (21 stars)
CAR = Carina, 10-40Myr, 46-88pc (5 stars)
ARG = Argus, 30-50Myr, 8-68pc (11 stars)
ABDMG = AB Doradus, 50-120Myr, 7-77pc (47 stars)
Amb = Ambiguous candidate members
Prev = Other previously proposed candidate members
--------------------------------------------------------------------------------
History:
From electronic version of the journal
* 01-Nov-2014: Insert into VizieR
* 07-Apr-2015: Table 4 added
References:
Malo et al. Paper I. 2013ApJ...762...88M 2013ApJ...762...88M This catalog
Gagne et al. Paper II. 2014ApJ...783..121G 2014ApJ...783..121G Cat. J/ApJ/783/121
Malo et al. Paper III. 2014ApJ...788...81M 2014ApJ...788...81M Cat. J/ApJ/788/81
Malo et al. Paper IV. 2014ApJ...792...37M 2014ApJ...792...37M
Gagne et al. Paper V. 2015ApJ...798...73G 2015ApJ...798...73G Cat. J/ApJ/798/73
Artigau et al. Paper VI. 2015ApJ...806..254A 2015ApJ...806..254A
Gagne et al. Paper VII. 2015ApJS..219...33G 2015ApJS..219...33G Cat. J/ApJS/219/33
Boucher et al. Paper VIII. 2016ApJ...832...50B 2016ApJ...832...50B
Gagne et al. Paper IX. 2017ApJS..228...18G 2017ApJS..228...18G
Desrochers et al. Paper X. 2018ApJ...852...55D 2018ApJ...852...55D
Gagne et al. Paper XI. 2018ApJ...856...23G 2018ApJ...856...23G Cat. J/ApJ/856/23
Gagne et al. Paper XII. 2018ApJ...860...43G 2018ApJ...860...43G Cat. J/ApJ/860/43
Gagne et al. Paper XIII. 2018ApJ...862..138G 2018ApJ...862..138G
(End) Emmanuelle Perret [CDS] 08-Sep-2014