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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
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:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 62 107 Known White Dwarfs within 20pc notes.dat 80 40 Individual notes
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
Bytes Format Units Label Explanations
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
Byte-by-byte Description of file: notes.dat
Bytes Format Units Label Explanations
1- 13 A13 --- Name White dwarf name 15- 80 A66 --- Note Text of the note
History: From electronic version of the journal
(End) James Marcout, Patricia Bauer [CDS] 10-Jul-2002
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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