Gandolfi, Davide ORCID: 0000-0001-8627-9628, Barragan, Oscar ORCID: 0000-0003-0563-0493, Hatzes, Artie P., Fridlund, Malcolm, Fossati, Luca ORCID: 0000-0003-4426-9530, Donati, Paolo, Johnson, Marshall C., Nowak, Grzegorz ORCID: 0000-0002-7031-7754, Prieto-Arranz, Jorge, Albrecht, Simon, Dai, Fei, Deeg, Hans, Endl, Michael, Grziwa, Sascha, Hjorth, Maria, Korth, Judith ORCID: 0000-0002-0076-6239, Nespral, David, Saario, Joonas, Smith, Alexis M. S., Antoniciello, Giuliano, Alarcon, Javier, Bedell, Megan, Blay, Pere, Brems, Stefan S., Cabrera, Juan ORCID: 0000-0001-6653-5487, Csizmadia, Szilard, Cusano, Felice, Cochran, William D., Eigmller, Philipp, Erikson, Anders, Gonzalez Hernandez, Jonay I., Guenther, Eike W., Hirano, Teruyuki, Suarez Mascareno, Alejandro, Narita, Norio, Palle, Enric, Parviainen, Hannu ORCID: 0000-0001-5519-1391, Paetzold, Martin, Persson, Carina M., Rauer, Heike, Saviane, Ivo, Schmidtobreick, Linda, Van Eylen, Vincent ORCID: 0000-0001-5542-8870, Winn, Joshua N. and Zakhozhay, Olga V. (2017). The Transiting Multi-planet System HD3167: A 5.7M(circle plus) Super-Earth and an 8.3M(circle plus) Mini-Neptune. Astron. J., 154 (3). BRISTOL: IOP PUBLISHING LTD. ISSN 1538-3881

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Abstract

HD3167 is a bright (V = 8.9 mag) K0V star observed by the NASA's K2 space mission during its Campaign 8. It has been recently 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 d). Here we present an intensive radial velocity follow-up of HD 3167 performed with the FIES@NOT, HARPS@ESO-3.6m, 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-circle plus, radius of 1.574 +/- -0.054 R-circle plus, and mean density of 8.00(-0.98)(+1.0) g/cm(-3), HD 3167b joins the small group of ultra-short period planets known to have a rocky terrestrial composition. HD 3167c has a mass of 8.33(-1.85)(+1.79) M-circle plus and a radius of 2.740(-0.100)(+0.106) R-circle plus, 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 (similar to 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 radial velocity measurements but the currently available data set does not allow us to draw any firm conclusion on the origin of the observed variation.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Gandolfi, DavideUNSPECIFIEDorcid.org/0000-0001-8627-9628UNSPECIFIED
Barragan, OscarUNSPECIFIEDorcid.org/0000-0003-0563-0493UNSPECIFIED
Hatzes, Artie P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Fridlund, MalcolmUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Fossati, LucaUNSPECIFIEDorcid.org/0000-0003-4426-9530UNSPECIFIED
Donati, PaoloUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Johnson, Marshall C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Nowak, GrzegorzUNSPECIFIEDorcid.org/0000-0002-7031-7754UNSPECIFIED
Prieto-Arranz, JorgeUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Albrecht, SimonUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Dai, FeiUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Deeg, HansUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Endl, MichaelUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Grziwa, SaschaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hjorth, MariaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Korth, JudithUNSPECIFIEDorcid.org/0000-0002-0076-6239UNSPECIFIED
Nespral, DavidUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Saario, JoonasUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Smith, Alexis M. S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Antoniciello, GiulianoUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Alarcon, JavierUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bedell, MeganUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Blay, PereUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Brems, Stefan S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cabrera, JuanUNSPECIFIEDorcid.org/0000-0001-6653-5487UNSPECIFIED
Csizmadia, SzilardUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cusano, FeliceUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cochran, William D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Eigmller, PhilippUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Erikson, AndersUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gonzalez Hernandez, Jonay I.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Guenther, Eike W.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hirano, TeruyukiUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Suarez Mascareno, AlejandroUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Narita, NorioUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Palle, EnricUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Parviainen, HannuUNSPECIFIEDorcid.org/0000-0001-5519-1391UNSPECIFIED
Paetzold, MartinUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Persson, Carina M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Rauer, HeikeUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Saviane, IvoUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schmidtobreick, LindaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Van Eylen, VincentUNSPECIFIEDorcid.org/0000-0001-5542-8870UNSPECIFIED
Winn, Joshua N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Zakhozhay, Olga V.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-220604
DOI: 10.3847/1538-3881/aa832a
Journal or Publication Title: Astron. J.
Volume: 154
Number: 3
Date: 2017
Publisher: IOP PUBLISHING LTD
Place of Publication: BRISTOL
ISSN: 1538-3881
Language: English
Faculty: Faculty of Mathematics and Natural Sciences
Divisions: Externe Einrichtungen > An-Institute > Associated Institutes of the Faculty of Mathematics and Natural Sciences > Rhenish Institute for Environmental Research - RIU
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
HABITABLE-ZONE; LIGHT CURVES; DWARF STARS; SPACED DATA; STELLAR; DENSITY; MISSION; KEPLER; SPECTROSCOPY; ARCHITECTUREMultiple languages
Astronomy & AstrophysicsMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/22060

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