Sign on

SAO/NASA ADS Astronomy Abstract Service

· Find Similar Abstracts (with default settings below)
· Electronic Refereed Journal Article (HTML)
· Full Refereed Journal Article (PDF/Postscript)
· Full Refereed Scanned Article (GIF)
· arXiv e-print (arXiv:astro-ph/0506311)
· On-line Data
· References in the article
· Citations to the Article (44) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (8)
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
Gl86B: a white dwarf orbits an exoplanet host star
Authors:
Mugrauer, M.; Neuhäuser, R.
Affiliation:
AA(Astrophysikalisches Institut, Universität Jena, Schillergäßchen 2-3, 07745 Jena, Germany; ), AB(Astrophysikalisches Institut, Universität Jena, Schillergäßchen 2-3, 07745 Jena, Germany; )
Publication:
Monthly Notices of the Royal Astronomical Society: Letters, Volume 361, Issue 1, pp. L15-L19. (MNRAS Homepage)
Publication Date:
07/2005
Origin:
MNRAS
MNRAS Keywords:
binaries: visual, stars: individual: Gl86, planetary systems, white dwarfs
DOI:
10.1111/j.1745-3933.2005.00055.x
Bibliographic Code:
2005MNRAS.361L..15M

Abstract

In this Letter we present our first high-contrast observations of the exoplanet host star Gl86 using NAOS-CONICA (NACO) and its new Simultaneous Differential Imager (SDI) as well as results from NACO spectroscopy. Els et al. found a faint comoving companion located only ~2 arcsec east of the exoplanet host star Gl86A. Our high-contrast SDI observations rule out additional stellar companions from 1 au up to 23 au, and are sensitive for faint T-dwarf companions down to 35 MJup. We present evidence for orbital motion of Gl86B around the exoplanet host star Gl86A, which finally confirms that this is a bound binary system. With the given photometry from Els et al. and the NACO spectroscopy obtained, we prove that the companion Gl86B is a cool white dwarf with an effective temperature of 5000 +/- 500 K. This is the first confirmed white dwarf companion to an exoplanet host star and the first observational confirmation that planets survive the post-main-sequence evolution (giant phase and planetary nebula) of a star from which they are separated by only one to two dozen astronomical units, as expected from theory.

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