J/ApJ/754/44 The AstraLux Large M-dwarf Survey (Janson+ 2012)
The AstraLux Large M-dwarf Survey
Janson M., Hormuth F., Bergfors C., Brandner W., Hippler S.,
Daemgen S., Kudryavtseva N., Schmalzl E., Schnupp C., Henning T.
<Astrophys. J., 754, 44-69 (2012)>
=2012ApJ...754...44J 2012ApJ...754...44J
ADC_Keywords: Stars, double and multiple ; Stars, masses ; Spectral types ;
Stars, M-type ; Proper motions ; Photometry ; Surveys
Keywords: Binaries, visual - Stars, late-type
Description:
These tables contain the results from a multiplicity survey of 701
M-type and 60 K-type stars (among which 182 new and 37 previously
known companions were detected in 205 systems) using the Lucky Imaging
cameras AstraLux Norte at the Calar Alto 2.2m and AstraLux Sur at the
ESO NTT. Most of the targets have been observed during two or more
epochs, and could be confirmed as physical companions through common
proper motion, often with orbital motion being confirmed in addition.
One table lists general properties of all the stars in the sample,
another the observational parameters of each confirmed or suspected
binary, a third lists the derived physical parameters of each
confirmed or suspected binary, the fourth lists astrometric data
points of all binary candidates for which multiple epochs have been
collected (also including literature measurements for previously
resolved binaries) and a final table lists observational properties of
confirmed or suspected background stars.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 61 761 Basic properties of all targets
table2.dat 72 219 Observed properties for binaries (suspected or
confirmed)
table3.dat 65 219 Derived properties for binaries (suspected or
confirmed)
table4.dat 100 441 Multi-epoch astrometry
table5.dat 81 30 Observed properties for background stars
(suspected or confirmed)
objects.dat 42 761 Coordinates for all targets
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See also:
B/wds : The Washington Visual Double Star Catalog (Mason+ 2001-2012)
VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)
I/297 : NOMAD Catalog (Zacharias+ 2005)
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)
I/238 : Yale Trigonometric Parallaxes, Fourth Edition (van Altena+ 1995)
J/A+A/527/A140 : Mass limits on substellar companions (Reffert+, 2011)
J/A+A/518/A1 : Galactic massive stars with AstraLux (Maiz Apellaniz, 2010)
J/other/Ser/180.71 : Masses of visual binaries (Cvetkovic+, 2010)
J/A+A/509/A52 : Search for companions with VLT/NACO (Chauvin+, 2010)
J/AJ/134/26 : Binaries with white dwarf in 2MASS (Hoard+, 2007)
J/ApJ/662/413 : 2MASS survey of wide multiplicity in 3 associations (Kraus+,
2007)
J/AJ/133/2825 : Star beyond the NLTT catalog (Reid+, 2007)
J/AJ/132/866 : New M dwarfs in solar neighborhood (Riaz+, 2006)
J/ApJS/161/394 : Low-luminosity companions to white dwarfs (Farihi+, 2005)
J/AJ/129/2428 : M dwarf-white dwarf binary systems (Silvestri+, 2005)
J/A+A/422/1023 : Nearby visual double stars photometry (Strigachev+, 2004)
J/ApJS/150/455 : New HIP-based parallaxes for 424 faint stars (Gould+, 2004)
J/AJ/128/463 : 20pc census from the NLTT catalogue (Reid+, 2004)
J/AJ/123/2806 : Nearby stars in the NLTT catalogue (Reid+, 2002)
J/A+A/396/933 : Double star measurements at Nice Obs. (Morlet+, 2002)
J/A+A/364/665 : Very low mass stars radial velocities (Segransan+, 2000)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 17 A17 --- 2MASS 2MASS identifier (JHHMMSSss+DDMMSSs)
19- 28 A10 --- Name Other name
30- 33 A4 --- SpT MK spectral type
35- 37 I3 pc Dist [3/385] Spectroscopic distance; 37% uncertainty
39- 41 A3 --- r_Dist Reference for Dist; not spectroscopic (1)
43- 47 F5.2 mag Jmag [5.27/12.8] 2MASS J band magnitude
49- 52 A4 --- Mult [BGMSU+ ] Multiplicity status (2)
54 A1 --- X [NSY] X-ray emission detected at >3.3σ (3)
56- 57 A2 --- Set Sample membership (IC=inclusive sample;
CS=constrained sample) (G1)
59- 61 A3 --- Inst Instrument used (N=AstraLux Norte; S=AstraLux Sur)
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Note (1): Reference as follows:
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(1) Parallax distances
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J52 = Jenkins et al. (1952gcsr.book.....J 1952gcsr.book.....J);
H80 = Harrington & Dahn (1980AJ.....85..454H 1980AJ.....85..454H);
A95 = van Altena et al. (1995, Cat. I/238);
P97 = Hipparcos; Perryman et al. (1997, Cat. I/239);
R02 = Reid & Cruz (2002, Cat. J/AJ/123/2806);
G04 = Gould & Chaname (2004, Cat. J/ApJS/150/455);
R04 = Reid et al. (2004, Cat. J/AJ/128/463);
H06 = Henry et al. (2006AJ....132.2360H 2006AJ....132.2360H);
L09 = Lepine et al. (2009AJ....137.4109L 2009AJ....137.4109L);
R10 = Reidel et al. (2010AJ....140..897R 2010AJ....140..897R);
S10 = Smart et al. (2010A&A...511A..30S 2010A&A...511A..30S).
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(2) Kinematic distances
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M05 = Mamajek (2005ApJ...634.1385M 2005ApJ...634.1385M).
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Note (2): Multiplicity status as follows:
M = Multiple system;
S = Single star;
BG = Confirmed or suspected background star;
U = Unclear case.
Note (3): X-ray emission detected at >3.3σ; as follows:
Y = Yes;
N = No.
S = As in Bergfors et al. (2010A&A...520A..54B 2010A&A...520A..54B), we use X-ray counts and
errors from ROSAT (Voges et al. 1999, Cat. IX/10) with 3.3σ as the
relevant significance criterion. In the case of binaries, this can lead
to a selection effect due to the fact that the flux of the primary and
secondary may add up to just above the significance criterion in cases
where a single star would not have reached the criterion and thus not
have been selected. We account for this in the same way as in Bergfors
et al. (2010A&A...520A..54B 2010A&A...520A..54B), by noting that LX/Lbol is roughly
constant as a function of spectral type, and calculating what the
significance would have been for the primary component alone, had it
been single. In those cases where the significance drops below the
3.3σ criterion, the binary is removed from the constrain sample
(CS). These cases are labeled "S". See Section 4 for further details.
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 17 A17 --- 2MASS 2MASS identifier (JHHMMSSss+DDMMSSs)
19- 20 A2 --- m_2MASS [A-D] Which pair (AB/AC/BC/etc.)
22- 25 F4.2 mag z'mag ? Sloan z'-band magnitude value
27- 30 F4.2 mag e_z'mag ? z'mag error
32- 35 F4.2 mag i'mag ? Sloan i'-band magnitude value
37- 40 F4.2 mag e_i'mag ? i'mag error
42- 46 F5.3 arcsec Sep [0.076/5.638] Angular separation of the pair
48- 52 F5.3 arcsec e_Sep Error on the angular separation
54- 58 F5.1 deg PA Position angle of the pair
60- 62 F3.1 deg e_PA Error on the position angle
64- 70 F7.2 yr Epoch [2007.61/2010.11] Epoch of observation
72 A1 --- New [NY] If first reported in this survey (Y/N)
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 17 A17 --- 2MASS 2MASS identifier (JHHMMSSss+DDMMSSs)
18- 19 A2 --- m_2MASS [A-D] Which pair (AB/AC/BC/etc.)
21- 24 A4 --- Sp1 MK spectral type for primary
26- 30 A5 --- Sp2 MK spectral type for secondary
32- 36 F5.3 Msun M1 [0.12/0.7] Mass for primary
38- 42 F5.3 Msun M2 [0.083/0.61]? Mass for secondary
44- 49 F6.1 AU psep [1.3/1836] Projected physical separation
51- 55 F5.1 AU e_psep Error on the separation
57- 62 I6 yr Per [2/114431] Rough estimate of the period
64- 65 A2 --- Set Sample membership (IC=inclusive sample;
CS=constrained sample) (G1)
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 17 A17 --- 2MASS 2MASS identifier (JHHMMSSss+DDMMSSs)
18- 19 A2 --- m_2MASS [A-D] Which pair (AB/AC/BC/etc.)
21 A1 --- f_2MASS [d-f] Note on star (1)
23- 27 F5.3 arcsec rho [0.082/5.8] Angular separation
29- 33 F5.3 arcsec e_rho ? Uncertainty in rho
35- 40 F6.2 deg PA ? Position angle
42- 45 F4.2 deg e_PA ? Uncertainty in PA
47- 53 F7.2 --- Epoch [1955/2011.67] Observational epoch
55- 71 A17 --- Aut Author's name of the reference
73- 91 A19 --- BibCode Reference bibcode
93- 96 I4 mas/yr PM [6/1182]? Total proper motion
98 A1 --- CPM [NUY] Common proper motion flag (Y/N or
(U)nclear)
100 A1 --- OM [NUY] Orbital motion flag (Y/N or (U)nclear)
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Note (1): Flag as follows:
d = A large number of observations exist in the literature;
one example listed here (see individual notes).
e = See individual note for J12351726+1318054.
f = Not included in binary statistics; see individual note.
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 17 A17 --- 2MASS 2MASS identifier (JHHMMSSss+DDMMSSs)
18- 19 A2 --- m_2MASS [A-D] Which pair (AB/AC/BC/etc.)
21- 25 F5.2 mag z'mag Sloan z'-band magnitude value
27- 30 F4.2 mag e_z'mag z'mag error
32- 36 F5.2 mag i'mag ? Sloan i'-band magnitude value
38- 41 F4.2 mag e_i'mag ? i'mag error
43- 47 F5.3 arcsec Sep [1.795/5.777] Angular separation of the pair
49- 53 F5.3 arcsec e_Sep Error on the angular separation
55- 59 F5.1 deg PA Position angle of the pair
61- 63 F3.1 deg e_PA Error on the position angle
65- 71 F7.2 yr Epoch [2007.84/2010.1] Epoch of observation
73- 81 A9 --- Reason Primary reason for bg expectation
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Byte-by-byte Description of file: objects.dat
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Bytes Format Units Label Explanations
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1- 17 A17 --- 2MASS 2MASS identifier (JHHMMSSss+DDMMSSs)
19- 20 I2 h RAh Hour of Right Ascension (J2000, Epoch 1998)
22- 23 I2 min RAm Minute of Right Ascension (J2000, Epoch 1998)
25- 29 F5.2 s RAs Second of Right Ascension (J2000, Epoch 1998)
31 A1 --- DE- Sign of Declination (J2000, Epoch 1998)
33- 34 I2 deg DEd Degree of Declination (J2000, Epoch 1998)
36- 37 I2 arcmin DEm Arcminute of Declination (J2000, Epoch 1998)
39- 42 F4.1 arcsec DEs Arcsecond of Declination (J2000, Epoch 1998)
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Global notes:
Note (G1): Out of our total sample, we construct two main sub-samples for
the purpose of statistical analysis. The first sample will be referred
to as the inclusive sample (IS). This sample includes most of the
stars observed, with some special cases excluded that are discussed in
the text. The second sample is a sub-sample of the first and is called
the constrained sample (CS). This sample is constructed to provide a
multiplicity fraction that is well defined and bias free, following
similar criteria to those in Bergfors et al. (2010A&A...520A..54B 2010A&A...520A..54B).
In CS, we make a cut for significant X-ray flux. See section 4 for
further explanations.
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Acknowledgment:
Markus Janson: <janson{at}astro.princeton.edu>
Reference:
Bergfors et al. Lucky Imaging survey for southern M dwarf binaries.
2010A&A...520A..54B 2010A&A...520A..54B
(End) Markus Janson [Princeton Univ.] 21-Aug-2012