J/ApJ/571/512 Distances of white dwarf stars (Holberg+, 2002)
A determination of the local density of white dwarf stars.
Holberg J.B., Oswalt T.D., Sion E.M.
<Astrophys. J. 571, 512 (2002)>
=2002ApJ...571..512H 2002ApJ...571..512H
ADC_Keywords: Stars, white dwarf ; Magnitudes ; Parallaxes, trigonometric ;
Stars, distances
Keywords: solar neighborhood - stars: statistics - white dwarfs
Abstract:
The most recent version of the Catalog of Spectroscopically Identified
White Dwarfs lists 2249 white dwarf stars. Among these stars are 109
white dwarfs that have either reliable trigonometric parallaxes or
color-based distance moduli that place them at a distance within 20pc
of the Sun. Most of these nearby white dwarfs are isolated stars, but
28 (25% of the sample) are in binary systems, including such
well-known systems as Sirius A/B and Procyon A/B. There are also three
double degenerate systems in this sample of the local white dwarf
population. The sample of local white dwarfs is largely complete out
to 13pc, and the local density of white dwarf stars is found to be
5.0±0.7x10-3pc-3, with a corresponding mass density of
3.4±0.5x10-3M☉_/pc3
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 62 107 Known White Dwarfs within 20pc
notes.dat 80 40 Individual notes
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See also:
III/70 : Luyten's White Dwarf Catalogues (Luyten, 1970-77)
III/210 : Spectroscopically Identified White Dwarfs (McCook+, 1999)
J/A+A/316/147 : Catalogue of ROSAT White Dwarfs (Fleming+ 1996)
J/A+A/363/1040 : DB white dwarfs from the Hamburg/ESO survey (Friedrich+, 2000)
J/A+A/378/556 : UVES/VLT spectra of white dwarfs (Koester+, 2001)
J/ApJS/133/413 : BVRIJHK photometry of cool white dwarfs (Bergeron+, 2001)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- Name White dwarf name
14 A1 --- n_Name [*] indicates a note in notes.dat file
16- 21 A6 --- Type White dwarf type
24- 28 F5.2 mag Vmag V magnitude
30- 34 F5.2 mag VMAG ? Absolute V magnitude
36- 41 F6.2 mas plx ? Trigonometric parallax
43- 47 F5.2 pc DVmag ? Distance estimated with V magnitude
49- 53 F5.2 pc Dplx ? Distance estimated with parallax
55- 59 F5.2 pc Dist Adopted distance
61- 62 A2 --- bin [d bb] System: b = binary system,
dd = double degenerate system
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Byte-by-byte Description of file: notes.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- Name White dwarf name
15- 80 A66 --- Note Text of the note
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History:
From electronic version of the journal
(End) James Marcout, Patricia Bauer [CDS] 10-Jul-2002