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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Autores principales: Delisle, J.-B., Ségransan, D., Dumusque, X., Diaz, R.F., Bouchy, F., Lovis, C., Pepe, F., Udry, S., Alonso, R., Benz, W., Coffinet, A., Collier Cameron, A., Deleuil, M., Figueira, P., Gillon, M., Lo Curto, G., Mayor, M., Mordasini, C., Motalebi, F., Moutou, C., Pollacco, D., Pompei, E., Queloz, D., Santos, N.C., Wyttenbach, A.
Formato: JOUR
Materias:
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
Radial velocity
Radial velocity measurements
Orbits
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00046361_v614_n_p_Delisle
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_00046361_v614_n_p_Delisle2023-10-03T14:01:18Z The HARPS search for southern extra-solar planets: XLIII. A compact system of four super-Earth planets orbiting HD 215152 Delisle, J.-B. Ségransan, D. Dumusque, X. Diaz, R.F. Bouchy, F. Lovis, C. Pepe, F. Udry, S. Alonso, R. Benz, W. Coffinet, A. Collier Cameron, A. Deleuil, M. Figueira, P. Gillon, M. Lo Curto, G. Mayor, M. Mordasini, C. Motalebi, F. Moutou, C. Pollacco, D. Pompei, E. Queloz, D. Santos, N.C. Wyttenbach, A. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar 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
Delisle, J.-B.
Ségransan, D.
Dumusque, X.
Diaz, R.F.
Bouchy, F.
Lovis, C.
Pepe, F.
Udry, S.
Alonso, R.
Benz, W.
Coffinet, A.
Collier Cameron, A.
Deleuil, M.
Figueira, P.
Gillon, M.
Lo Curto, G.
Mayor, M.
Mordasini, C.
Motalebi, F.
Moutou, C.
Pollacco, D.
Pompei, E.
Queloz, D.
Santos, N.C.
Wyttenbach, A.
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.
format JOUR
author Delisle, J.-B.
Ségransan, D.
Dumusque, X.
Diaz, R.F.
Bouchy, F.
Lovis, C.
Pepe, F.
Udry, S.
Alonso, R.
Benz, W.
Coffinet, A.
Collier Cameron, A.
Deleuil, M.
Figueira, P.
Gillon, M.
Lo Curto, G.
Mayor, M.
Mordasini, C.
Motalebi, F.
Moutou, C.
Pollacco, D.
Pompei, E.
Queloz, D.
Santos, N.C.
Wyttenbach, A.
author_facet Delisle, J.-B.
Ségransan, D.
Dumusque, X.
Diaz, R.F.
Bouchy, F.
Lovis, C.
Pepe, F.
Udry, S.
Alonso, R.
Benz, W.
Coffinet, A.
Collier Cameron, A.
Deleuil, M.
Figueira, P.
Gillon, M.
Lo Curto, G.
Mayor, M.
Mordasini, C.
Motalebi, F.
Moutou, C.
Pollacco, D.
Pompei, E.
Queloz, D.
Santos, N.C.
Wyttenbach, A.
author_sort Delisle, J.-B.
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
url http://hdl.handle.net/20.500.12110/paper_00046361_v614_n_p_Delisle
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