Sign on

SAO/NASA ADS Astronomy Abstract Service

· Find Similar Abstracts (with default settings below)
· Full Refereed Journal Article (PDF/Postscript)
· Full Refereed Scanned Article (GIF)
· arXiv e-print (arXiv:astro-ph/9504088)
· References in the article
· Citations to the Article (60) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (4)
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
The discovery of a short-period double-degenerate binary star
Authors:
Marsh, T. R.
Affiliation:
AA(University of Southampton, Department of Physics, Highfield, Southampton SO17 1BJ, UK )
Publication:
Monthly Notices of the Royal Astronomical Society, Volume 275, Issue 1, pp. L1-L5. (MNRAS Homepage)
Publication Date:
07/1995
Origin:
MNRAS; KNUDSEN
MNRAS Keywords:
BINARIES: CLOSE, BINARIES: SPECTROSCOPIC, STARS: INDIVIDUAL: PG 1101+364, WHITE DWARFS
Bibliographic Code:
1995MNRAS.275L...1M

Abstract

We have found that the white dwarf PG 1101+364 is a double-lined white dwarf/white dwarf binary with an orbital period of 3.47h. PG 1101+364 is the shortest period detached double-degenerate yet found, and gravitational radiation will cause it to merge in 2.5x10^9 yr. PG 1101+364 has a mass ratio of 0.87+/-0.03. From the relative strengths of the narrow core of Hα, the lighter and therefore larger star appears to contribute more of the light by an amount that indicates almost equal temperatures for the two stars. We chose to observe PG 1101+364 on the basis of its low spectroscopic mass (0.31 M_solar), and the discovery of its binary nature confirms the belief that binary evolution is required to produce such low-mass white dwarfs. The radial velocity semi-amplitudes (69.7+/-1.7 and 80.3+/-1.6 km s^-1) and the spectroscopic mass show that we see the orbit of PG 1101+364 at a low inclination of ~=25 deg.

Printing Options

Print whole paper
Print Page(s) through

Return 600 dpi PDF to Acrobat/Browser. Different resolutions (200 or 600 dpi), formats (Postscript, PDF, etc), page sizes (US Letter, European A4, etc), and compression (gzip,compress,none) can be set through the Printing Preferences


More Article Retrieval Options

HELP for Article Retrieval
Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)
   

Find Similar Abstracts:

Use: Authors
Title
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints