J/MNRAS/413/1121 SDSS post-common envelope binaries. X (Rebassa-Mansergas+ 2011)
Post-common envelope binaries from SDSS.
X: the origin of low-mass white dwarfs.
Rebassa-Mansergas A., Nebot Gomez-Moran A., Schreiber M.R., Girven J.,
Gansicke B.T.
<Mon. Not. R. Astron. Soc., 413, 1121-1131 (2011)>
=2011MNRAS.413.1121R 2011MNRAS.413.1121R
ADC_Keywords: Stars, double and multiple; Stars, white dwarf; Stars, dwarfs ;
Stars, masses
Keywords: binaries: close - binaries: spectroscopic - stars: evolution -
white dwarfs
Abstract:
We present the first white dwarf mass distributions of a large and
homogeneous sample of post-common envelope binaries (PCEBs) and wide
white dwarf main-sequence (WDMS) binaries directly obtained from
observations. Both distributions are statistically independent, with
PCEBs showing a clear concentration of systems towards the low-mass
end of the distribution and the white dwarf mass distribution of wide
WDMS binaries being similar to that of single white dwarfs. Our
results provide evidence that the majority of low-mass
(Mwd≲0.5M☉) white dwarfs are formed in close binaries.
Description:
We have obtained radial velocity information spanning at least two
nights from our follow-up observations of several hundred SDSS WDMS
binaries (e.g. Rebassa-Mansergas et al. 2008MNRAS.390.1635R 2008MNRAS.390.1635R; Schreiber
et al. 2008A&A...484..441S 2008A&A...484..441S, 2010, Cat. J/A+A/513/L7) supplemented by
the SDSS sub-spectra (all SDSS spectra are the result of combining at
least three individual sub-exposures; see Rebassa-Mansergas et al.
2007, Cat. J/MNRAS/382/1377, 2010, Cat. J/MNRAS/402/620).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 37 211 White dwarf masses for the 211 SDSS WDMS binaries
(76 PCEBs and 135 wide WDMS binary candidates)
used in this work
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See also:
J/MNRAS/382/1377 : SDSS WD main-sequence binaries (Rebassa-Mansergas+, 2007)
J/MNRAS/402/620 : SDSS WD main-sequence binaries (Rebassa-Mansergas+, 2010)
J/A+A/513/L7 : SDSS post common envelope binaries. VIII (Schreiber+, 2010)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- --- [SDSS]
5- 23 A19 --- SDSS SDSS name (JHHMMSS.ss+DDMMSS.s)
25- 29 F5.3 Msun Mwd Mass of the white dwarf
31- 35 F5.3 Msun e_Mwd rms uncertainty on Mwd
37 I1 --- Type [0/1] Type of binary: 0=WDMS, 1=PCEB (1)
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Note (1): Type as follows:
1 = PCEB (post-common envelope binary)
0 = WDMS (wide white dwarf main-sequence) binary
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 25-Nov-2011