Sirius_Alpha Admin
Number of posts : 4320 Location : Earth Registration date : 2008-04-06
| Subject: GD 66 Astrometry 6th May 2012, 8:11 pm | |
| Precision Astrometry of the Exoplanet Host Candidate GD 66 http://arxiv.org/abs/1205.0806 - Quote :
- 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 U.S. Naval Observatory relative astrometry of GD 66, a white dwarf thought to harbor 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.
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Lazarus dF star
Number of posts : 3337 Registration date : 2008-06-12
| Subject: Re: GD 66 Astrometry 7th May 2012, 2:56 am | |
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