The HARPS search for southern extra-solar planets: XLIII. A compact system of four super-Earth planets orbiting HD 215152
We report the discovery of four super-Earth planets around HD 215152, with orbital periods of 5.76, 7.28, 10.86, and 25.2 d, and minimum masses of 1.8, 1.7, 2.8, and 2.9 M · respectively. This discovery is based on 373 high-quality radial velocity measurements taken by HARPS over 13 yr. Given the lo...
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2018
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00046361_v614_n_p_Delisle http://hdl.handle.net/20.500.12110/paper_00046361_v614_n_p_Delisle |
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paper:paper_00046361_v614_n_p_Delisle2023-06-08T14:28:23Z The HARPS search for southern extra-solar planets: XLIII. A compact system of four super-Earth planets orbiting HD 215152 Planets and satellites: detection Planets and satellites: dynamical evolution and stability Planets and satellites: general Extrasolar planets Satellites Signal to noise ratio Compact system Dynamical analysis Orbital periods Planets and satellites: detections Planets and satellites: dynamical evolution and stabilities Planets and satellites: general Radial velocity Radial velocity measurements Orbits We report the discovery of four super-Earth planets around HD 215152, with orbital periods of 5.76, 7.28, 10.86, and 25.2 d, and minimum masses of 1.8, 1.7, 2.8, and 2.9 M · respectively. This discovery is based on 373 high-quality radial velocity measurements taken by HARPS over 13 yr. Given the low masses of the planets, the signal-to-noise ratio is not sufficient to constrain the planet eccentricities. However, a preliminary dynamical analysis suggests that eccentricities should be typically lower than about 0.03 for the system to remain stable. With two pairs of planets with a period ratio lower than 1.5, with short orbital periods, low masses, and low eccentricities, HD 215152 is similar to the very compact multi-planet systems found by Kepler, which is very rare in radial-velocity surveys. This discovery proves that these systems can be reached with the radial-velocity technique, but characterizing them requires a huge amount of observations. © 2018 ESO. 2018 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00046361_v614_n_p_Delisle http://hdl.handle.net/20.500.12110/paper_00046361_v614_n_p_Delisle |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Planets and satellites: detection Planets and satellites: dynamical evolution and stability Planets and satellites: general Extrasolar planets Satellites Signal to noise ratio Compact system Dynamical analysis Orbital periods Planets and satellites: detections Planets and satellites: dynamical evolution and stabilities Planets and satellites: general Radial velocity Radial velocity measurements Orbits |
| spellingShingle |
Planets and satellites: detection Planets and satellites: dynamical evolution and stability Planets and satellites: general Extrasolar planets Satellites Signal to noise ratio Compact system Dynamical analysis Orbital periods Planets and satellites: detections Planets and satellites: dynamical evolution and stabilities Planets and satellites: general Radial velocity Radial velocity measurements Orbits The HARPS search for southern extra-solar planets: XLIII. A compact system of four super-Earth planets orbiting HD 215152 |
| topic_facet |
Planets and satellites: detection Planets and satellites: dynamical evolution and stability Planets and satellites: general Extrasolar planets Satellites Signal to noise ratio Compact system Dynamical analysis Orbital periods Planets and satellites: detections Planets and satellites: dynamical evolution and stabilities Planets and satellites: general Radial velocity Radial velocity measurements Orbits |
| description |
We report the discovery of four super-Earth planets around HD 215152, with orbital periods of 5.76, 7.28, 10.86, and 25.2 d, and minimum masses of 1.8, 1.7, 2.8, and 2.9 M · respectively. This discovery is based on 373 high-quality radial velocity measurements taken by HARPS over 13 yr. Given the low masses of the planets, the signal-to-noise ratio is not sufficient to constrain the planet eccentricities. However, a preliminary dynamical analysis suggests that eccentricities should be typically lower than about 0.03 for the system to remain stable. With two pairs of planets with a period ratio lower than 1.5, with short orbital periods, low masses, and low eccentricities, HD 215152 is similar to the very compact multi-planet systems found by Kepler, which is very rare in radial-velocity surveys. This discovery proves that these systems can be reached with the radial-velocity technique, but characterizing them requires a huge amount of observations. © 2018 ESO. |
| title |
The HARPS search for southern extra-solar planets: XLIII. A compact system of four super-Earth planets orbiting HD 215152 |
| title_short |
The HARPS search for southern extra-solar planets: XLIII. A compact system of four super-Earth planets orbiting HD 215152 |
| title_full |
The HARPS search for southern extra-solar planets: XLIII. A compact system of four super-Earth planets orbiting HD 215152 |
| title_fullStr |
The HARPS search for southern extra-solar planets: XLIII. A compact system of four super-Earth planets orbiting HD 215152 |
| title_full_unstemmed |
The HARPS search for southern extra-solar planets: XLIII. A compact system of four super-Earth planets orbiting HD 215152 |
| title_sort |
harps search for southern extra-solar planets: xliii. a compact system of four super-earth planets orbiting hd 215152 |
| publishDate |
2018 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00046361_v614_n_p_Delisle http://hdl.handle.net/20.500.12110/paper_00046361_v614_n_p_Delisle |
| _version_ |
1768542201337348096 |