Precision Astrometry of the Exoplanet Host Candidate GD 66
Abstract
The potential existence of a giant planet orbiting within a few au of a stellar remnant has profound implications for both the survival and possible regeneration of planets during post-main-sequence stellar evolution. This paper reports Hubble Space Telescope Fine Guidance Sensor and US Naval Observatory relative astrometry of GD66, a white dwarf thought to harbour a giant planet between 2 and 3 au based on stellar pulsation arrival times. Combined with existing infrared data, the precision measurements here rule out all stellar-mass and brown dwarf companions, implying that only a planet remains plausible, if orbital motion is indeed the cause of the variations in pulsation timing.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 2012
- Accession Number
- ADA565512
Entities
People
- C. C. Dahn
- D. S. Spiegel
- E. P. Nelan
- H. C. Harris
- J. Farihi
- J. Nordhaus
- J. P. Subasavage
Organizations
- United States Naval Observatory Flagstaff Station