J/AJ/134/26 Binaries with white dwarf in 2MASS (Hoard+, 2007)
Cool companions to white dwarf stars from the Two Micron All Sky Survey all sky
data release.
Hoard D.W., Wachter S., Sturch L.K., Widhalm A.M., Weiler K.P.,
Pretorius M.L., Wellhouse J.W., Gibiansky M.
<Astron. J., 134, 26-42 (2007)>
=2007AJ....134...26H 2007AJ....134...26H
ADC_Keywords: Stars, double and multiple ; Stars, white dwarf ;
Photometry, infrared
Keywords: binaries: general - infrared: stars - stars: low-mass, brown dwarfs -
white dwarfs
Abstract:
We present the culmination of our near-infrared survey of the
optically spectroscopically identified white dwarf stars from the
McCook and Sion (1999ApJS..121....1M 1999ApJS..121....1M, see Cat. III/235) catalog,
conducted using photometric data from the Two Micron All Sky Survey
final All Sky Data Release. The color selection technique, which
identifies candidate binaries containing a white dwarf and a low-mass
stellar (or substellar) companion via their distinctive locus in the
near-infrared color-color diagram, is demonstrated to be simple to
apply and to yield candidates with a high rate of subsequent
confirmation. We recover 105 confirmed binaries, and identify 27 firm
candidates (19 of which are new to this work) and 21 tentative
candidates (17 of which are new to this work) from the 2MASS data.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 66 153 2MASS photometry for white dwarfs with near-IR excess
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See also:
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
III/235 : Spectroscopically Identified White Dwarfs (McCook+, 2008)
J/ApJ/586/1356 : White dwarfs with cool companions (Wachter+, 2003)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Name White dwarf identification (HHMM+DDMM, B1950)
12- 27 A16 --- 2MASS 2MASS identification (HHMMSSss+DDMMSSs, J2000)
29- 34 F6.3 mag Jmag 2MASS J band magnitude
36- 40 F5.3 mag e_Jmag Uncertainty in J
42- 47 F6.3 mag Hmag 2MASS H band magnitude
49- 53 F5.3 mag e_Hmag Uncertainty in H
55- 60 F6.3 mag Ksmag 2MASS Ks band magnitude
62- 66 F5.3 mag e_Ksmag Uncertainty in Ksmag
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History:
From electronic version of the journal
References:
Wachter et al., Paper I 2003ApJ...586.1356W 2003ApJ...586.1356W, Cat. J/ApJ/586/1356
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 22-Aug-2009