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An Eccentric Hot Jupiter Orbiting the Subgiant HD 185269
We report the detection of a Jupiter-mass planet in a 6.838 day orbitaround the 1.28 Msolar subgiant HD 185269. The eccentricityof HD 185269b (e=0.30) is unusually large compared to other planetswithin 0.1 AU of their stars. Photometric observations demonstrate thatthe star is constant to +/-0.0001 mag on the radial velocity period,strengthening our interpretation of a planetary companion. This planetwas detected as part of our radial velocity survey of evolved starslocated on the subgiant branch of the H-R diagram-also known as theHertzsprung gap. These stars, which have masses between 1.2 and 2.5Msolar, play an important role in the investigation of thefrequency of extrasolar planets as a function of stellar mass.Based on observations obtained at the Lick Observatory, which isoperated by the University of California.
| The absolute spectrophotometry of carbon stars. VI. Abundance of carbon in the atmospheres.
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Osservazione e dati astrometrici
| Costellazione: | Sagittario |
| Ascensione retta: | 20h00m44.06s |
| Declinazione: | -39°53'20.9" |
| Magnitudine apparente: | 9.993 |
| Moto proprio RA: | 16.1 |
| Moto proprio Dec: | 2.1 |
| B-T magnitude: | 10.459 |
| V-T magnitude: | 10.032 |
Cataloghi e designazioni:
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