J/MNRAS/424/1841 SDSS-UKIDSS white dwarf-main sequence binaries (Liu+, 2012)
White dwarf-main sequence binaries identified within SDSS DR7 and UKIDSS DR5.
Liu C., Li L., Zhang F., Zhang Y., Jiang D., Liu J.
<Mon. Not. R. Astron. Soc., 424, 1841-1851 (2012)>
=2012MNRAS.424.1841L 2012MNRAS.424.1841L
ADC_Keywords: Binaries, spectroscopic ; Stars, white dwarf ; Stars, dwarfs
Keywords: binaries: close - binaries: spectroscopic -
stars: fundamental parameters - white dwarfs
Abstract:
We develop optical and near-infrared colour-selection criteria based
on the model colours of binaries consisting of a white dwarf and a
main-sequence star. Using our colour-selection algorithm, we present a
catalogue of 523 white dwarf-main sequence (WDMS) binaries from the
spectroscopic Sloan Digital Sky Survey Data Release 7 (SDSS DR7), most
of them previously identified. Among them, we identify 86 objects as
new WDMS binaries. 95 WDMS candidates are also found from the
photometric SDSS DR7, cross-matched with the United Kingdom Infrared
Telescope (UKIRT) Infrared Sky Survey Data Release 5 (UKIDSS DR5).
Based on a χ2 minimization technique, we derive independent
stellar parameters such as the effective temperatures, surface
gravities, masses and distances of the white dwarfs and secondary
stars and the metallicities of the secondaries.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table2.dat 97 614 Coordinates and SDSS-UKIDSS magnitudes for a
part of the selection of 523 WDMS binaries
and 95 candidates
table3.dat 119 523 Stellar parameters for 523 WDMS binaries
--------------------------------------------------------------------------------
See also:
II/294 : SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+ 2009)
II/319 : UKIDSS-DR9 LAS, GCS and DXS Surveys (Lawrence+ 2012)
J/ApJS/167/40 : SDSS4 confirmed white dwarfs catalog (Eisenstein+, 2006)
J/AJ/134/741 : New close binary systems from SDSS DR5 (Silvestri+, 2007)
J/MNRAS/382/1377 : SDSS WD main-sequence binaries (Rebassa-Mansergas+, 2007)
J/A+A/486/843 : White dwarf-red dwarf binaries in SDSS (Augusteijn+, 2008)
J/A+A/496/191 : Spectral analysis of 636 SDSS WD-M binaries (Heller+, 2009)
J/MNRAS/402/620 : SDSS WD main-sequence binaries (Rebassa-Mansergas+, 2010)
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 A4 --- --- [SDSS]
5- 23 A19 --- SDSS SDSS designation (JHHMMSS.ss+DDMMSS.s)
25- 33 F9.5 deg RAdeg Right ascension in decimal degrees (J2000)
35- 43 F9.5 deg DEdeg Declination in decimal degrees (J2000)
45- 49 F5.2 mag umag SDSS u magnitude
51- 55 F5.2 mag gmag ?=- SDSS g magnitude
57- 61 F5.2 mag rmag ?=- SDSS r magnitude
63- 67 F5.2 mag imag SDSS i magnitude
69- 73 F5.2 mag zmag ?=- SDSS z magnitude
75- 79 F5.2 mag Ymag ?=- UKIDSS Y magnitude
81- 85 F5.2 mag Jmag ?=- UKIDSS J magnitude
87- 91 F5.2 mag Hmag ?=- UKIDSS H magnitude
93- 97 F5.2 mag Kmag ?=- UKIDSS K magnitude
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 19 A19 --- SDSS SDSS designation (JHHMMSS.ss+DDMMSS.s)
21- 26 A6 --- Type Spectral type
28- 32 I5 d MJD SDSS MJD number
34- 37 I4 --- Plate SDSS plate number
39- 41 I3 --- Fiber SDSS Finer number
43- 47 I5 K Teff1 ?=- Primary (WD) effective temperature
49- 51 F3.1 [cm/s2] logg1 ?=- Primary (WD) surface gravity
53- 56 F4.1 [Sun] [Fe/H]2 ?=- Secondary (dM star) Metallicity
58- 61 I4 K Teff2 ?=- Secondary (dM star) effective temperature
63- 65 F3.1 [cm/s2] logg2 ?=- Secondary (dM star) surface gravity
67- 70 I4 pc d1 ?=- Primary (WD) heliocentric distance
72- 73 I2 pc e_d1 ?=- rms uncertainty on d1
75- 78 F4.2 Msun M1 ?=- WD mass
80- 83 F4.2 [yr] logA ?=- WD Age
85- 88 I4 pc d2 ?=- Secondary distance
90- 92 I3 pc e_d2 ?=- rms uncertainty on d2
94- 97 F4.2 Msun M2 ?=- Secondary (dM star) mass
99-103 F5.2 --- C [-1.414/1.414]?=- Discrepancy coefficient (2)
105-109 F5.2 --- chi2 ?=- Reduced χ2`value
111-119 A9 --- Flag Flags for previous studies (1)
--------------------------------------------------------------------------------
Note (1): Previous studies are:
e = Eisenstein et al. (2006, Cat. J/ApJS/167/40)
s = Silvestri et al. (2007, Cat. J/AJ/134/741)
a = Augusteijn et al. (2008, Cat. J/A+A/486/843)
h = Heller et al. (2009, Cat. J/A+A/496/191)
r = Rebassa-Mansergas et al. 2007, Cat. J/MNRAS/382/1377 and
2010, Cat. J/MNRAS/402/620
Note (2): Discrepancy coefficient introduced by Heller et al. 2009 (see
Cat. J/A+A/496/191), defined as: sqrt(2)[(d1-d2)/(d1+d2)]
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 02-May-2013