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  • Gandolfi, DavideUniversita degli Studi di Torino,University of Turin (author)

The Transiting Multi-planet System HD 3167: A 5.7 M ⊕ Super-Earth and an 8.3 M ⊕ Mini-Neptune

  • Article/chapterEnglish2017

Publisher, publication year, extent ...

  • 2017-08-31
  • American Astronomical Society,2017
  • electronicrdacarrier

Numbers

  • LIBRIS-ID:oai:research.chalmers.se:9c71c960-91a4-4124-af23-2c3c8c888e35
  • https://doi.org/10.3847/1538-3881/aa832aDOI
  • https://research.chalmers.se/publication/251678URI

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  • Language:English
  • Summary in:English

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

Notes

  • HD 3167 is a bright (V = 8.9 mag) K0 V star observed by NASA’s K2 space mission during its Campaign 8. It has recently been found to host two small transiting planets, namely, HD 3167b, an ultra-short-period (0.96 days) super-Earth, and HD 3167c, a mini-Neptune on a relatively long-period orbit (29.85 days). Here we present an intensive radial velocity (RV) follow-up of HD 3167 performed with the FIES@NOT, HARPS@ESO-3.6 m, and HARPS-N@TNG spectrographs. We revise the system parameters and determine radii, masses, and densities of the two transiting planets by combining the K2 photometry with our spectroscopic data. With a mass of 5.69 ± 0.44 M⊕, a radius of 1.574 ± 0.054 R⊕, and a mean density of {8.00}-0.98+1.10 g cm^-3, HD 3167b joins the small group of ultra-short-period planets known to have rocky terrestrial compositions. HD 3167c has a mass of 8.33-1.85+1.79 M⊕ and a radius of 2.74}-0.100+0.106 R⊕, yielding a mean density of 2.21-0.53+0.56 g cm^-3, indicative of a planet with a composition comprising a solid core surrounded by a thick atmospheric envelope. The rather large pressure scale height (∼350 km) and the brightness of the host star make HD 3167c an ideal target for atmospheric characterization via transmission spectroscopy across a broad range of wavelengths. We found evidence of additional signals in the RV measurements but the currently available data set does not allow us to draw any firm conclusions on the origin of the observed variation.

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  • Barragán, OscarUniversita degli Studi di Torino,University of Turin (author)
  • Hatzes, Artie P.Thüringer Landessternwarte Tautenburg (author)
  • Fridlund, Malcolm,1952Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)malfri (author)
  • Fossati, Luca (author)
  • Donati, PaoloOsservatorio Astrofisico di Arcetri,Arcetri Astrophysical Observatory (author)
  • Johnson, Marshall C.Ohio State University (author)
  • Nowak, GrzegorzUniversidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias (author)
  • Prieto-Arranz, JorgeUniversidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias (author)
  • Albrecht, SimonÅrhus Universitet,Aarhus University (author)
  • Dai, FeiPrinceton University,Massachusetts Institute of Technology (MIT) (author)
  • Deeg, HansUniversidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias (author)
  • Endl, MichaelThe University of Texas at Austin, USA (author)
  • Grziwa, SaschaUniversität zu Köln,University of Cologne (author)
  • Hjorth, MariaÅrhus Universitet,Aarhus University (author)
  • Korth, JudithUniversität zu Köln,University of Cologne (author)
  • Nespral, DavidUniversidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias (author)
  • Saario, JoonasNordic Optical Telescope (author)
  • Smith, Alexis M. S.Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
  • Antoniciello, GiulianoUniversita degli Studi di Torino,University of Turin (author)
  • Alarcon, JavierEuropean Southern Observatory Santiago (author)
  • Bedell, MeganUniversity of Chicago (author)
  • Blay, PereInstituto de Astrofísica de Canarias,Nordic Optical Telescope (author)
  • Brems, Stefan S. (author)
  • Cabrera, JuanDeutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
  • Csizmadia, SzilardDeutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
  • Cusano, FeliceIstituto nazionale di astrofisica (INAF) (author)
  • Cochran, William D.The University of Texas at Austin, USA (author)
  • Eigmüller, PhilippDeutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
  • Erikson, AndersDeutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
  • Hernández, GonzálezInstituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna (author)
  • Guenther, Eike W.Thüringer Landessternwarte Tautenburg (author)
  • Hirano, TeruyukiTokyo Institute of Technology (author)
  • Suárez Mascareño, AlejandroUniversité de Genève,University of Geneva,Instituto de Astrofísica de Canarias (author)
  • Narita, NorioUniversity of Tokyo, Japan,National Astronomical Observatory of Japan,National Institutes of Natural Sciences (NINS) (author)
  • Palle, EnricUniversidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias (author)
  • Parviainen, HannuUniversidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias (author)
  • Pätzold, MartinUniversität zu Köln,University of Cologne (author)
  • Persson, Carina,1964Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)carina64 (author)
  • Rauer, HeikeDeutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR),Technische Universität Berlin (author)
  • Saviane, IvoEuropean Southern Observatory Santiago (author)
  • Schmidtobreick, LindaEuropean Southern Observatory Santiago (author)
  • Van Eylen, VincentUniversiteit Leiden (UL),Leiden University (UL) (author)
  • Winn, Joshua N.Princeton University (author)
  • Zakhozhay, Olga V.Main Astronomical Observatory Nasu (author)
  • Universita degli Studi di TorinoThüringer Landessternwarte Tautenburg (creator_code:org_t)

Related titles

  • In:Astronomical Journal: American Astronomical Society154:3, s. 123-1538-38810004-6256

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