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  • Morello, Giuseppe,1989Chalmers University of Technology,INAF Palermo Astronomical Observatory,University of La Laguna (ULL),Instituto de Astrofísica de Canarias (author)

TOI-1442 b and TOI-2445 b: Two potentially rocky ultra-short period planets around M dwarfs

  • Article/chapterEnglish2023

Publisher, publication year, extent ...

  • 2023-03-20
  • EDP Sciences,2023
  • electronicrdacarrier

Numbers

  • LIBRIS-ID:oai:research.chalmers.se:84d4dac4-4cee-4cff-86e9-38c7086a3122
  • https://doi.org/10.1051/0004-6361/202243592DOI
  • https://research.chalmers.se/publication/535862URI
  • https://lup.lub.lu.se/record/889a9207-5a97-422f-9110-383ebaf97708URI

Supplementary language notes

  • Language:English
  • Summary in:English

Part of subdatabase

Classification

  • Subject category:art swepub-publicationtype
  • Subject category:ref swepub-contenttype

Notes

  • Context. Exoplanets with orbital periods of less than one day are known as ultra-short period (USP) planets. They are relatively rare products of planetary formation and evolution processes, but especially favourable for characterisation with current planet detection methods. At the time of writing, 125 USP planets have already been confirmed. Aims. Our aim is to validate the planetary nature of two new transiting planet candidates around M dwarfs announced by the NASA Transiting Exoplanet Survey Satellite (TESS), registered as TESS Objects of Interest (TOIs) TOI-1442.01 and TOI-2445.01. Methods. We used TESS data, ground-based photometric light curves, and Subaru/IRD spectrograph radial velocity (RV) measurements to validate both planetary candidates and to establish their physical properties. Results. TOI-1442 b is a validated exoplanet with an orbital period of P = 0.4090682 ± 0.0000004 day, a radius of Rp = 1.15 ± 0.06 R☉, and equilibrium temperature of Tp,eq = 1357+−4942 K. TOI-2445 b is also validated with an orbital period of P = 0.3711286 ± 0.0000004 day, a radius of Rp = 1.33 ± 0.09 R☉, and equilibrium temperature of Tp,eq = 1330+−6156 K. Their physical properties align with current empirical trends and formation theories of USP planets. Based on the RV measurements, we set 3σ upper mass limits of 8 M☉ and 20 M☉, thus confirming the non-stellar, sub-Jovian nature of both transiting objects. More RV measurements will be needed to constrain the planetary masses and mean densities, and the predicted presence of outer planetary companions. These targets extend the small sample of USP planets orbiting around M dwarfs up to 21 members. They are also among the 20 most suitable terrestrial planets for atmospheric characterisation via secondary eclipse with the James Webb Space Telescope, according to a widespread emission spectroscopy metric.

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Parviainen, H.Universidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias (author)
  • Murgas, F.Universidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias (author)
  • Palle, E.Instituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna (author)
  • Oshagh, M.Instituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna (author)
  • Fukui, A.University of Tokyo, Japan,Instituto de Astrofísica de Canarias (author)
  • Hirano, T.National Astronomical Observatory of Japan,National Institutes of Natural Sciences (NINS) (author)
  • Ishikawa, Hiroyuki TakoNational Astronomical Observatory of Japan,National Institutes of Natural Sciences (NINS) (author)
  • Mori, MayukoUniversity of Tokyo, Japan,University of Liège (author)
  • Narita, NorioUniversity of Tokyo, Japan,Instituto de Astrofísica de Canarias,National Institutes of Natural Sciences (NINS) (author)
  • Collins, K. A.Harvard-Smithsonian Center for Astrophysics (author)
  • Barkaoui, KhalidMassachusetts Institute of Technology (MIT),Instituto de Astrofísica de Canarias,Universite de Liège,University of Liège (author)
  • Lewin, Pablo (author)
  • Cadieux, C.Université de Montréal (author)
  • De Leon, Jerome P.University of Tokyo, Japan (author)
  • Soubkiou, A.Universidade do Porto,University of Porto,Université Cadi Ayyad,Cadi Ayyad University (author)
  • Garcia, N. AbreuInstituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna (author)
  • Crouzet, N.European Space Research and Technology Centre (ESA ESTEC) (author)
  • Esparza-Borges, E.Instituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna (author)
  • Rodríguez, G. E.FernándezInstituto de Astrofísica de Canarias (author)
  • Galán, D.Instituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna (author)
  • Hori, YasunoriNational Astronomical Observatory of Japan,National Institutes of Natural Sciences (NINS) (author)
  • Ikoma, MasahiroNational Institutes of Natural Sciences (NINS) (author)
  • Isogai, K.University of Tokyo, Japan,Kyoto University (author)
  • Kagetani, T.University of Tokyo, Japan (author)
  • Kawauchi, KiyoeUniversity of Tokyo, Japan,Instituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna (author)
  • Kimura, TadahiroUniversity of Tokyo, Japan (author)
  • Kodama, T.University of Tokyo, Japan (author)
  • Korth, Judith,1987Chalmers University of Technology,Lund University,Lunds universitet,Astronomi - Genomgår omorganisation,Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation,Naturvetenskapliga fakulteten,Astrofysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Lund Observatory - Undergoing reorganization,Department of Astronomy and Theoretical Physics - Undergoing reorganization,Faculty of Science,Astrophysics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)ju7237ko (author)
  • Kotani, TakayukiThe Graduate University for Advanced Studies (SOKENDAI),National Astronomical Observatory of Japan,National Institutes of Natural Sciences (NINS) (author)
  • Krishnamurthy, VigneshwaranNational Astronomical Observatory of Japan,National Institutes of Natural Sciences (NINS) (author)
  • Kurita, S.University of Tokyo, Japan (author)
  • Laza-Ramos, A.Instituto de Astrofísica de Canarias (author)
  • Livingston, J.University of Tokyo, Japan (author)
  • Luque, R.Instituto de Astrofisica de Andalucía (IAA),Institute of Astrophysics of Andalusia (IAA) (author)
  • Madrigal-Aguado, A.Instituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna (author)
  • Nishiumi, T.University of Tokyo, Japan,National Institutes of Natural Sciences (NINS),The Graduate University for Advanced Studies (SOKENDAI) (author)
  • Orell-Miquel, J.Instituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna (author)
  • Puig-Subirà, M.Instituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna (author)
  • Sánchez-Benavente, M.Universidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias (author)
  • Stangret, M.Instituto de Astrofísica de Canarias,Istituto nazionale di astrofisica (INAF),Universidad de la Laguna,University of La Laguna (author)
  • Tamura, MotohideUniversity of Tokyo, Japan,National Institutes of Natural Sciences (NINS),National Astronomical Observatory of Japan (author)
  • Terada, Y.Academia Sinica Taiwan,National Taiwan University (author)
  • Watanabe, NoriharuUniversity of Tokyo, Japan (author)
  • Zou, Y.University of Tokyo, Japan (author)
  • Benkhaldoun, Z.Université Cadi Ayyad,Cadi Ayyad University (author)
  • Collins, K. I.George Mason University (author)
  • Doyon, RenéUniversité de Montréal (author)
  • Garcia, L.J.Universite de Liège,University of Liège (author)
  • Ghachoui, M.Université Cadi Ayyad,Cadi Ayyad University,Universite de Liège,University of Liège (author)
  • Gillon, MichaëlUniversite de Liège,University of Liège (author)
  • Jehin, EmmanuelUniversite de Liège,University of Liège (author)
  • Pozuelos, Francisco J.Universite de Liège,University of Liège,Instituto de Astrofisica de Andalucía (IAA),Institute of Astrophysics of Andalusia (IAA) (author)
  • Schwarz, R. P.Harvard-Smithsonian Center for Astrophysics (author)
  • Timmermans, M.Universite de Liège,University of Liège (author)
  • Chalmers University of TechnologyINAF Palermo Astronomical Observatory (creator_code:org_t)
  • et al.

Related titles

  • In:Astronomy and Astrophysics: EDP Sciences6730004-63611432-0746

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