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Article: The CARMENES search for exoplanets around M dwarfs: Dynamical characterization of the multiple planet system GJ 1148 and prospects of habitable exomoons around GJ 1148 b

TitleThe CARMENES search for exoplanets around M dwarfs: Dynamical characterization of the multiple planet system GJ 1148 and prospects of habitable exomoons around GJ 1148 b
Authors
Keywordsplanetary systems
stars: general
stars: late-type
planets and satellites
dynamical evolution and stability
Issue Date2020
PublisherEDP Sciences. The Journal's web site is located at http://www.aanda.org
Citation
Astronomy & Astrophysics, 2020, v. 638, p. A16:1-A16:18 How to Cite?
AbstractContext. GJ 1148 is an M-dwarf star hosting a planetary system composed of two Saturn-mass planets in eccentric orbits with periods of 41.38 and 532.02 days. Aims. We reanalyze the orbital configuration and dynamics of the GJ 1148 multi-planetary system based on new precise radial velocity measurements taken with CARMENES. Methods. We combined new and archival precise Doppler measurements from CARMENES with those available from HIRES for GJ 1148 and modeled these data with a self-consistent dynamical model. We studied the orbital dynamics of the system using the secular theory and direct N-body integrations. The prospects of potentially habitable moons around GJ 1148 b were examined. Results. The refined dynamical analyses show that the GJ 1148 system is long-term stable in a large phase-space of orbital parameters with an orbital configuration suggesting apsidal alignment, but not in any particular high-order mean-motion resonant commensurability. GJ 1148 b orbits inside the optimistic habitable zone (HZ). We find only a narrow stability region around the planet where exomoons can exist. However, in this stable region exomoons exhibit quick orbital decay due to tidal interaction with the planet.
Persistent Identifierhttp://hdl.handle.net/10722/285282
ISSN
2023 Impact Factor: 5.4
2023 SCImago Journal Rankings: 1.896
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorTrifonov, T-
dc.contributor.authorLee, MH-
dc.contributor.authorKürster, M-
dc.contributor.authorHenning, TH-
dc.contributor.authorGrishin, E-
dc.contributor.authorStock, S-
dc.contributor.authorTjoa, J-
dc.contributor.authorCaballero, JA-
dc.contributor.authorWong, KH-
dc.contributor.authorBauer, FF-
dc.contributor.authorQuirrenbach, A-
dc.contributor.authorZechmeister, M-
dc.contributor.authorRibas, I-
dc.contributor.authorReffert, S-
dc.contributor.authorReiners, A-
dc.contributor.authorAmado, PJ-
dc.contributor.authorKossakowski, D-
dc.contributor.authorAzzaro, M-
dc.contributor.authorBéjar, VJS-
dc.contributor.authorCortés-Contreras, M-
dc.contributor.authorDreizler, S-
dc.contributor.authorHatzes, AP-
dc.contributor.authorJeffers, SV-
dc.contributor.authorKaminski, A-
dc.contributor.authorLafarga, M-
dc.contributor.authorMontes, D-
dc.contributor.authorMorales, JC-
dc.contributor.authorPavlov, A-
dc.contributor.authorRodríguez-López, C-
dc.contributor.authorSchmitt, JHMM-
dc.contributor.authorSolano, E-
dc.contributor.authorBarnes, R-
dc.date.accessioned2020-08-18T03:51:59Z-
dc.date.available2020-08-18T03:51:59Z-
dc.date.issued2020-
dc.identifier.citationAstronomy & Astrophysics, 2020, v. 638, p. A16:1-A16:18-
dc.identifier.issn0004-6361-
dc.identifier.urihttp://hdl.handle.net/10722/285282-
dc.description.abstractContext. GJ 1148 is an M-dwarf star hosting a planetary system composed of two Saturn-mass planets in eccentric orbits with periods of 41.38 and 532.02 days. Aims. We reanalyze the orbital configuration and dynamics of the GJ 1148 multi-planetary system based on new precise radial velocity measurements taken with CARMENES. Methods. We combined new and archival precise Doppler measurements from CARMENES with those available from HIRES for GJ 1148 and modeled these data with a self-consistent dynamical model. We studied the orbital dynamics of the system using the secular theory and direct N-body integrations. The prospects of potentially habitable moons around GJ 1148 b were examined. Results. The refined dynamical analyses show that the GJ 1148 system is long-term stable in a large phase-space of orbital parameters with an orbital configuration suggesting apsidal alignment, but not in any particular high-order mean-motion resonant commensurability. GJ 1148 b orbits inside the optimistic habitable zone (HZ). We find only a narrow stability region around the planet where exomoons can exist. However, in this stable region exomoons exhibit quick orbital decay due to tidal interaction with the planet.-
dc.languageeng-
dc.publisherEDP Sciences. The Journal's web site is located at http://www.aanda.org-
dc.relation.ispartofAstronomy & Astrophysics-
dc.rightsReproduced with permission from [journal name], © [copyright holder] [2020]. The original publication is available at https://doi.org/10.1051/0004-6361/201936987-
dc.subjectplanetary systems-
dc.subjectstars: general-
dc.subjectstars: late-type-
dc.subjectplanets and satellites-
dc.subjectdynamical evolution and stability-
dc.titleThe CARMENES search for exoplanets around M dwarfs: Dynamical characterization of the multiple planet system GJ 1148 and prospects of habitable exomoons around GJ 1148 b-
dc.typeArticle-
dc.identifier.emailLee, MH: mhlee@hku.hk-
dc.identifier.authorityLee, MH=rp00724-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1051/0004-6361/201936987-
dc.identifier.scopuseid_2-s2.0-85088117444-
dc.identifier.hkuros312910-
dc.identifier.volume638-
dc.identifier.spageA16:1-
dc.identifier.epageA16:18-
dc.identifier.isiWOS:000540420700003-
dc.publisher.placeFrance-
dc.identifier.issnl0004-6361-

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