Nowak, Grzegorz, Palle, Enric, Gandolfi, Davide, Deeg, Hans J., Hirano, Teruyuki, Barragan, Oscar, Kuzuhara, Masayuki, Dai, Fei, Luque, Rafael ORCID: 0000-0002-4671-2957, Persson, Carina M., Fridlund, Malcolm, Johnson, Marshall C., Korth, Judith, Livingston, John H., Grziwa, Sascha, Mathur, Savita, Hatzes, Artie P., Prieto-Arranz, Jorge, Nespral, David, Hidalgo, Diego, Hjorth, Maria, Albrecht, Simon, Van Eylen, Vincent ORCID: 0000-0001-5542-8870, Lam, Kristine W. F., Cochran, William D., Esposito, Massimiliano, Csizmadia, Szilard, Guenther, Eike W., Kabath, Petr, Blay, Pere, Brahm, Rafael, Jordan, Andres, Espinoza, Nestor, Rojas, Felipe, Casasayas Barris, Nuria, Rodler, Florian, Alonso Sobrino, Roi, Cabrera, Juan ORCID: 0000-0001-6653-5487, Carleo, Ilaria, Chaushev, Alexander, de Leon, Jerome, Eigmueller, Philipp, Endl, Michael, Erikson, Anders, Fukui, Akihiko, Georgieva, Iskra, Gonzalez-Cuesta, Lucia, Knudstrup, Emil, Lund, Mikkel N., Montanes Rodriguez, Pilar, Murgas, Felipe, Narita, Norio, Niraula, Prajwal, Paetzold, Martin, Rauer, Heike, Redfield, Seth, Ribas, Ignasi, Skarka, Marek, Smith, Alexis M. S. and Subjak, Jano (2020). K2-280 b - a low density warm sub-Saturn around a mildly evolved star. Mon. Not. Roy. Astron. Soc., 497 (4). S. 4423 - 4436. OXFORD: OXFORD UNIV PRESS. ISSN 1365-2966

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Abstract

We present an independent discovery and detailed characterization of K2-280 b, a transiting low density warm sub-Saturn in a 19.9-d moderately eccentric orbit (e = 0.35(-0.04)(+0.05)) from K2 campaign 7. A joint analysis of high precision HARPS, HARPS-N, and FIES radial velocity measurements and K2 photometric data indicates that K2-280 b has a radius of R-b = 7.50 +/- 0.44 R-circle plus and a mass of M-b = 37.1 +/- 5.6 M-circle plus, yielding a mean density of rho(b) = 0.48(-0.10)(+0.13) g cm(-3). The host star is a mildly evolved G7 star with an effective temperature of T-eff = 5500 +/- 100 K, a surface gravity of log g(star) = 4.21 +/- 0.05 (cgs), and an iron abundance of [Fe/H] = 0.33 +/- 0.08 dex, and with an inferred mass of M-star = 1.03 +/- 0.03 M-circle dot and a radius of R-star = 1.28 +/- 0.07 R-circle dot. We discuss the importance of K2-280 b for testing formation scenarios of sub-Saturn planets and the current sample of this intriguing group of planets that are absent in the Solar system.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Nowak, GrzegorzUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Palle, EnricUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gandolfi, DavideUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Deeg, Hans J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hirano, TeruyukiUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Barragan, OscarUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kuzuhara, MasayukiUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Dai, FeiUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Luque, RafaelUNSPECIFIEDorcid.org/0000-0002-4671-2957UNSPECIFIED
Persson, Carina M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Fridlund, MalcolmUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Johnson, Marshall C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Korth, JudithUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Livingston, John H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Grziwa, SaschaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Mathur, SavitaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hatzes, Artie P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Prieto-Arranz, JorgeUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Nespral, DavidUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hidalgo, DiegoUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hjorth, MariaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Albrecht, SimonUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Van Eylen, VincentUNSPECIFIEDorcid.org/0000-0001-5542-8870UNSPECIFIED
Lam, Kristine W. F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cochran, William D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Esposito, MassimilianoUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Csizmadia, SzilardUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Guenther, Eike W.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kabath, PetrUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Blay, PereUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Brahm, RafaelUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Jordan, AndresUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Espinoza, NestorUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Rojas, FelipeUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Casasayas Barris, NuriaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Rodler, FlorianUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Alonso Sobrino, RoiUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cabrera, JuanUNSPECIFIEDorcid.org/0000-0001-6653-5487UNSPECIFIED
Carleo, IlariaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Chaushev, AlexanderUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
de Leon, JeromeUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Eigmueller, PhilippUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Endl, MichaelUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Erikson, AndersUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Fukui, AkihikoUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Georgieva, IskraUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gonzalez-Cuesta, LuciaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Knudstrup, EmilUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lund, Mikkel N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Montanes Rodriguez, PilarUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Murgas, FelipeUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Narita, NorioUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Niraula, PrajwalUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Paetzold, MartinUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Rauer, HeikeUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Redfield, SethUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ribas, IgnasiUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Skarka, MarekUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Smith, Alexis M. S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Subjak, JanoUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-316124
DOI: 10.1093/mnras/staa2077
Journal or Publication Title: Mon. Not. Roy. Astron. Soc.
Volume: 497
Number: 4
Page Range: S. 4423 - 4436
Date: 2020
Publisher: OXFORD UNIV PRESS
Place of Publication: OXFORD
ISSN: 1365-2966
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
PRECISE RADIAL-VELOCITIES; SIZED PLANET; GIANT STARS; EVOLUTION; MASS; SPECTROSCOPY; SPECTROGRAPH; EXOPLANETS; ABUNDANCE; STANDARDMultiple languages
Astronomy & AstrophysicsMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/31612

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