Hatzes, Artie P., Gandolfi, Davide ORCID: 0000-0001-8627-9628, Korth, Judith ORCID: 0000-0002-0076-6239, Rodler, Florian, Sabotta, Silvia ORCID: 0000-0001-9078-5574, Esposito, Massimiliano ORCID: 0000-0002-6893-4534, Barragan, Oscar, Van Eylen, Vincent ORCID: 0000-0001-5542-8870, Livingston, John H., Serrano, Luisa Maria, Luque, Rafael, Smith, Alexis M. S., Redfield, Seth, Persson, Carina M., Paetzold, Martin, Palle, Enric, Nowak, Grzegorz, Osborne, Hannah L. M., Narita, Norio, Mathur, Savita, Lam, Kristine W. F., Kabath, Petr, Johnson, Marshall C., Guenther, Eike W., Grziwa, Sascha, Goffo, Elisa, Fridlund, Malcolm, Endl, Michael, Deeg, Hans J., Csizmadia, Szilard, Cochran, William D., Gonzalez Cuesta, Lucia, Chaturvedi, Priyanka, Carleo, Ilaria, Cabrera, Juan, Beck, Paul G. and Albrecht, Simon (2022). A Radial Velocity Study of the Planetary System of pi Mensae: Improved Planet Parameters for pi Mensae c and a Third Planet on a 125 Day Orbit. Astron. J., 163 (5). BRISTOL: IOP Publishing Ltd. ISSN 1538-3881

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Abstract

pi Men hosts a transiting planet detected by the Transiting Exoplanet Survey Satellite space mission and an outer planet in a 5.7 yr orbit discovered by radial velocity (RV) surveys. We studied this system using new RV measurements taken with the HARPS spectrograph on ESO's 3.6 m telescope, as well as archival data. We constrain the stellar RV semiamplitude due to the transiting planet, pi Men c, as K (c) = 1.21 +/- 0.12 m s(-1), resulting in a planet mass of M (c) = 3.63 +/- 0.38 M (circle plus). A planet radius of R (c) = 2.145 +/- 0.015 R (circle plus) yields a bulk density of rho (c) = 2.03 +/- 0.22 g cm(-3). The precisely determined density of this planet and the brightness of the host star make pi Men c an excellent laboratory for internal structure and atmospheric characterization studies. Our HARPS RV measurements also reveal compelling evidence for a third body, pi Men d, with a minimum mass M (d) sin i (d) = 13.38 +/- 1.35 M (circle plus) orbiting with a period of P (orb,d) = 125 days on an eccentric orbit (e (d) = 0.22). A simple dynamical analysis indicates that the orbit of pi Men d is stable on timescales of at least 20 Myr. Given the mutual inclination between the outer gaseous giant and the inner rocky planet and the presence of a third body at 125 days, pi Men is an important planetary system for dynamical and formation studies.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Hatzes, Artie P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gandolfi, DavideUNSPECIFIEDorcid.org/0000-0001-8627-9628UNSPECIFIED
Korth, JudithUNSPECIFIEDorcid.org/0000-0002-0076-6239UNSPECIFIED
Rodler, FlorianUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Sabotta, SilviaUNSPECIFIEDorcid.org/0000-0001-9078-5574UNSPECIFIED
Esposito, MassimilianoUNSPECIFIEDorcid.org/0000-0002-6893-4534UNSPECIFIED
Barragan, OscarUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Van Eylen, VincentUNSPECIFIEDorcid.org/0000-0001-5542-8870UNSPECIFIED
Livingston, John H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Serrano, Luisa MariaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Luque, RafaelUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Smith, Alexis M. S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Redfield, SethUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Persson, Carina M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Paetzold, MartinUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Palle, EnricUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Nowak, GrzegorzUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Osborne, Hannah L. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Narita, NorioUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Mathur, SavitaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lam, Kristine W. F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kabath, PetrUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Johnson, Marshall C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Guenther, Eike W.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Grziwa, SaschaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Goffo, ElisaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Fridlund, MalcolmUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Endl, MichaelUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Deeg, Hans J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Csizmadia, SzilardUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cochran, William D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gonzalez Cuesta, LuciaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Chaturvedi, PriyankaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Carleo, IlariaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cabrera, JuanUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Beck, Paul G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Albrecht, SimonUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-697516
DOI: 10.3847/1538-3881/ac5dcb
Journal or Publication Title: Astron. J.
Volume: 163
Number: 5
Date: 2022
Publisher: IOP Publishing Ltd
Place of Publication: BRISTOL
ISSN: 1538-3881
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
HUBBLE-SPACE-TELESCOPE; POWERED MASS-LOSS; VALLEY; EXOPLANETS; COMPANION; CATALOG; SEARCH; VIEWMultiple languages
Astronomy & AstrophysicsMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/69751

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