A Radial Velocity Study of the Planetary System of π Mensae: Improved Planet Parameters for π Mensae c and a Third Planet on a 125 Day Orbit

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dc.contributor.authorHatzes, Artie P.
dc.contributor.authorGandolfi, Davide
dc.contributor.authorKorth, Judith
dc.contributor.authorRodler, Florian
dc.contributor.authorSabotta, Silvia
dc.contributor.authorEsposito, Massimiliano
dc.contributor.authorBarragán, Oscar
dc.contributor.authorVan Eylen, Vincent
dc.contributor.authorLivingston, John H.
dc.contributor.authorSerrano, Luisa Maria
dc.contributor.authorLuque, Rafael
dc.contributor.authorSmith, Alexis M. S.
dc.contributor.authorRedfield, Seth
dc.contributor.authorPersson, Carina M.
dc.contributor.authorPätzold, Martin
dc.contributor.authorPalle, Enric
dc.contributor.authorNowak, Grzegorz
dc.contributor.authorOsborne, Hannah L. M.
dc.contributor.authorNarita, Norio
dc.contributor.authorMathur, Savita
dc.contributor.authorLam, Kristine W. F.
dc.contributor.authorKabáth, Petr
dc.contributor.authorJohnson, Marshall C.
dc.contributor.authorGuenther, Eike W.
dc.contributor.authorGrziwa, Sascha
dc.contributor.authorGoffo, Elisa
dc.contributor.authorFridlund, Malcolm
dc.contributor.authorEndl, Michael
dc.contributor.authorDeeg, Hans J.
dc.contributor.authorCsizmadia, Szilard
dc.contributor.authorCochran, William D.
dc.contributor.authorCuesta, Lucía González
dc.contributor.authorChaturvedi, Priyanka
dc.contributor.authorCarleo, Ilaria
dc.contributor.authorCabrera, Juan
dc.contributor.authorBeck, Paul G.
dc.contributor.authorAlbrecht, Simon
dc.date.accessioned2022-05-10T10:51:19Z
dc.date.available2022-05-10T10:51:19Z
dc.date.issued2022-04-20
dc.date.updated2022-04-29T15:48:03Z
dc.description.abstractπ 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, π Men c, as Kc = 1.21 ± 0.12 m s−1, resulting in a planet mass of Mc = 3.63 ± 0.38 M⊕. A planet radius of Rc = 2.145 ± 0.015 R⊕ yields a bulk density of ρc = 2.03 ± 0.22 g cm−3. The precisely determined density of this planet and the brightness of the host star make π Men c an excellent laboratory for internal structure and atmospheric characterization studies. Our HARPS RV measurements also reveal compelling evidence for a third body, π Men d, with a minimum mass Md sin id = 13.38 ± 1.35 M⊕ orbiting with a period of Porb,d = 125 days on an eccentric orbit (ed = 0.22). A simple dynamical analysis indicates that the orbit of π 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, π Men is an important planetary system for dynamical and formation studies.en
dc.description.sponsorshipDFG, 313698196, SPP 1992: Exploration der Diversität extrasolarer Planetenen
dc.identifier.eissn1538-3881
dc.identifier.issn0004-6256
dc.identifier.urihttps://depositonce.tu-berlin.de/handle/11303/16840
dc.identifier.urihttp://dx.doi.org/10.14279/depositonce-15618
dc.language.isoenen
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en
dc.subject.ddc520 Astronomie und zugeordnete Wissenschaftende
dc.subject.otherradial velocityen
dc.subject.otherplanetary systemen
dc.subject.otherπ Mensaeen
dc.subject.otherTransiting Exoplanet Survey Satelliteen
dc.subject.othertelescopeen
dc.titleA Radial Velocity Study of the Planetary System of π Mensae: Improved Planet Parameters for π Mensae c and a Third Planet on a 125 Day Orbiten
dc.typeArticleen
dc.type.versionpublishedVersionen
dcterms.bibliographicCitation.articlenumber223en
dcterms.bibliographicCitation.doi10.3847/1538-3881/ac5dcben
dcterms.bibliographicCitation.issue5en
dcterms.bibliographicCitation.journaltitleThe Astronomical Journalen
dcterms.bibliographicCitation.originalpublishernameIOPen
dcterms.bibliographicCitation.originalpublisherplaceBristolen
dcterms.bibliographicCitation.volume163en
tub.accessrights.dnbfreeen
tub.affiliationFak. 2 Mathematik und Naturwissenschaften::Zentrum für Astronomie und Astrophysikde
tub.affiliation.facultyFak. 2 Mathematik und Naturwissenschaftende
tub.affiliation.instituteZentrum für Astronomie und Astrophysikde
tub.publisher.universityorinstitutionTechnische Universität Berlinen

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