J/ApJS/156/47 DA white dwarfs from the Palomar Green Survey (Liebert+, 2005)
The formation rate and mass and luminosity functions of DA white dwarfs from
the Palomar Green survey.
Liebert J., Bergeron P., Holberg J.B.
<Astrophys. J. Suppl. Ser., 156, 47-68 (2005)>
=2005ApJS..156...47L 2005ApJS..156...47L
ADC_Keywords: Stars, white dwarf ; Stars, masses ; Effective temperatures
Keywords: stars: fundamental parameters -
stars: luminosity function, mass function - white dwarfs
Abstract:
Spectrophotometric observations at high signal-to-noise ratio were
obtained of a complete sample of 347 DA white dwarfs from the Palomar
Green (PG) Survey (1986, Cat. II/207). Fits of observed Balmer lines
to synthetic spectra calculated from pure-hydrogen model atmospheres
were used to obtain robust values of Teff, log(g), masses, radii,
and cooling ages. The luminosity function of the sample, weighted by
1/Vmax, was obtained and compared with other determinations.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 95 347 Atmospheric parameters of DA stars from the
complete PG sample
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See also:
II/207 : Palomar-Green catalog UV-excess stellar objects (Green+ 1986)
J/ApJS/133/413 : BVRIJHK photometry of cool white dwarfs (Bergeron+, 2001)
J/ApJ/607/426 : Catalog of white dwarfs in SDSS-DR1 (Kleinman+, 2004)
J/MNRAS/335/673 : DA white dwarfs in 2dF QSO Redshift Survey (Vennes+, 2002)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- PG The Palomar Green Survey identification
10- 19 A10 --- Name Other common object name
21- 26 I6 K Teff Effective temperature
28- 32 I5 K e_Teff Formal uncertainty in Teff
34- 37 F4.2 [cm/s2] log(g) Log of the surface gravity
39- 42 F4.2 [cm/s2] e_log(g) Formal uncertainty in log(g)
44- 47 F4.2 solMass Mass Stellar mass in solar units
49- 52 F4.2 solMass e_Mass Uncertainty in Mass
54- 58 F5.2 mag VMAG Absolute visual magnitude
60- 64 F5.2 [solLum] logL Log of the luminosity in solar units
66- 71 F6.3 mag Vmag Apparent V band magnitude
73- 76 I4 pc Dist Heliocentric Distance
78- 84 E7.3 pc-3 1/Vmax Stellar contribution to the local space density
86- 89 F4.2 [yr] logtau Log of the cooling time
91- 94 A4 --- n_PG Additional notes on PG (1)
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Note (1): Additional notes on PG, defined as follows:
1 = Binary;
2 = V magnitude derived from Bph;
3 = DAO star, Teff and log(g) from Bergeron et al. (1994ApJ...432..305B 1994ApJ...432..305B);
4 = Misclassified in the PG catalog;
5 = V magnitude derived from g and r Sloan Digital Sky Survey
(Cat. J/AJ/126/2579);
6 = ZZ Ceti star;
7 = Double degenerate;
8 = DA + magnetic DB, Teff and log(g) from Liebert et al.
(1993ApJ...418..426L 1993ApJ...418..426L);
9 = Planetary nebula nucleus;
10 = Magnetic, Teff and log(g) from Schmidt et al. (1986ApJ...309..218S 1986ApJ...309..218S);
11 = Magnetic, Teff and log(g) from Bergeron & Liebert
(2002ApJ...566.1091B 2002ApJ...566.1091B);
12 = Magnetic, Teff and log(g) from Liebert et al. (2003AJ....125..348L 2003AJ....125..348L);
13 = Double degenerate?;
14 = Magnetic;
15 = Magnetic, Teff and log(g) from Liebert et al. (1985PASP...97..158L 1985PASP...97..158L);
16 = Magnetic, Teff and log(g) from Schmidt et al. (1992ApJ...394..603S 1992ApJ...394..603S);
17 = Not in McCook & Sion (1999, Cat. III/235).
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 18-May-2005