Lazarus dF star
Number of posts : 3337 Registration date : 2008-06-12
| Subject: Planet-mimicking variability in Gamma Draconis (Eltanin) 17th January 2018, 12:40 am | |
| Hatzes et al. "The Radial Velocity Variability of the K-giant Gamma Draconis: Stellar Variability Masquerading as a Planet" https://arxiv.org/abs/1801.05239Combined with the fact that several proposed multiplanet systems around K-giants are dynamically unstable, this raises the possibility that quite a few of the planet candidates around K-giants are actually the effect of intrinsic stellar variability. | |
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Edasich dK star
Number of posts : 2289 Location : Tau Ceti g - Mid Latitudes Registration date : 2008-06-02
| Subject: Re: Planet-mimicking variability in Gamma Draconis (Eltanin) 17th January 2018, 9:26 am | |
| Who knows? I want to think that it may even be the contrary... | |
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Lazarus dF star
Number of posts : 3337 Registration date : 2008-06-12
| Subject: Re: Planet-mimicking variability in Gamma Draconis (Eltanin) 15th September 2020, 2:44 am | |
| More on the quasi-periodic RV variations of Gamma Draconis: looks like there's a ~15-day oscillation as well. This cannot be a planet either, because a planet with a 15-day orbit would be located inside the star. Delgado & Dodson-Robinson "Modeling the quasiperiodic radial velocity variations of gamma Draconis" https://arxiv.org/abs/2009.06506 | |
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| Subject: Re: Planet-mimicking variability in Gamma Draconis (Eltanin) | |
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