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The Kepler-10 planetary system revisited by HARPS-N:a hot rocky world and a solid Neptune-mass planet
- Source :
- Dumusque , X , Bonomo , A S , Haywood , R D , Malavolta , L , Segransan , D , Buchhave , L A , Cameron , A C , Latham , D W , Molinari , E , Pepe , F , Udry , S , Charbonneau , D , Cosentino , R , Dressing , C D , Figueira , P , Fiorenzano , A F M , Gettel , S , Harutyunyan , A , Horne , K , Lopez-Morales , M , Lovis , C , Mayor , M , Micela , G , Motalebi , F , Nascimbeni , V , Phillips , D F , Piotto , G , Pollacco , D , Queloz , D , Rice , K , Sasselov , D , Sozzetti , A , Szentgyorgyi , A & Watson , C 2014 , ' The Kepler-10 planetary system revisited by HARPS-N : a hot rocky world and a solid Neptune-mass planet ' , The Astrophysical Journal , vol. 789 , no. 2 , 154 .
- Publication Year :
- 2014
-
Abstract
- Kepler-10b was the first rocky planet detected by the Kepler satellite and confirmed with radial velocity follow-up observations from Keck-HIRES. The mass of the planet was measured with a precision of around 30%, which was insufficient to constrain models of its internal structure and composition in detail. In addition to Kepler-10b, a second planet transiting the same star with a period of 45 days was statistically validated, but the radial velocities were only good enough to set an upper limit of 20 M ⊕ for the mass of Kepler-10c. To improve the precision on the mass for planet b, the HARPS-N Collaboration decided to observe Kepler-10 intensively with the HARPS-N spectrograph on the Telescopio Nazionale Galileo on La Palma. In total, 148 high-quality radial-velocity measurements were obtained over two observing seasons. These new data allow us to improve the precision of the mass determination for Kepler-10b to 15%. With a mass of 3.33 ± 0.49 M ⊕ and an updated radius of R ⊕, Kepler-10b has a density of 5.8 ± 0.8 g cm–3, very close to the value predicted by models with the same internal structure and composition as the Earth. We were also able to determine a mass for the 45-day period planet Kepler-10c, with an even better precision of 11%. With a mass of 17.2 ± 1.9 M ⊕ and radius of R ⊕, Kepler-10c has a density of 7.1 ± 1.0 g cm–3. Kepler-10c appears to be the first strong evidence of a class of more massive solid planets with longer orbital periods.
Details
- Database :
- OAIster
- Journal :
- Dumusque , X , Bonomo , A S , Haywood , R D , Malavolta , L , Segransan , D , Buchhave , L A , Cameron , A C , Latham , D W , Molinari , E , Pepe , F , Udry , S , Charbonneau , D , Cosentino , R , Dressing , C D , Figueira , P , Fiorenzano , A F M , Gettel , S , Harutyunyan , A , Horne , K , Lopez-Morales , M , Lovis , C , Mayor , M , Micela , G , Motalebi , F , Nascimbeni , V , Phillips , D F , Piotto , G , Pollacco , D , Queloz , D , Rice , K , Sasselov , D , Sozzetti , A , Szentgyorgyi , A & Watson , C 2014 , ' The Kepler-10 planetary system revisited by HARPS-N : a hot rocky world and a solid Neptune-mass planet ' , The Astrophysical Journal , vol. 789 , no. 2 , 154 .
- Notes :
- English
- Publication Type :
- Electronic Resource
- Accession number :
- edsoai.on1322664501
- Document Type :
- Electronic Resource