K2-280 b - a low density warm sub-Saturn around a mildly evolved star

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Nowak, GrzegorzInstituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna (author)

K2-280 b - a low density warm sub-Saturn around a mildly evolved star

Article/chapterEnglish2020

Publisher, publication year, extent ...

2020-07-17
Oxford University Press (OUP),2020

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LIBRIS-ID:oai:research.chalmers.se:c9965d4f-ce4f-401f-b3eb-2ad415c631c1
https://research.chalmers.se/publication/520687URI
https://doi.org/10.1093/mnras/staa2077DOI

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Language:English
Summary in:English

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SwePubSwePub

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

Notes

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.

Subject headings and genre

NATURVETENSKAP Fysik Astronomi, astrofysik och kosmologi hsv//swe
NATURAL SCIENCES Physical Sciences Astronomy, Astrophysics and Cosmology hsv//eng
NATURVETENSKAP Geovetenskap och miljövetenskap Annan geovetenskap och miljövetenskap hsv//swe
NATURAL SCIENCES Earth and Related Environmental Sciences Other Earth and Related Environmental Sciences hsv//eng
NATURVETENSKAP Kemi Materialkemi hsv//swe
NATURAL SCIENCES Chemical Sciences Materials Chemistry hsv//eng
techniques: radial velocities
techniques: spectroscopic
techniques: photometric
stars: individual: (EPIC 216494238, K2-280)
planets and satellites: detection

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

Palle, EnricUniversidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias (author)
Gandolfi, DavideUniversita degli Studi di Torino,University of Turin (author)
Deeg, Hans J.Instituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna (author)
Hirano, TeruyukiTokyo Institute of Technology (author)
Barragan, OscarUniversity Of Oxford,Universita degli Studi di Torino,University of Turin (author)
Kuzuhara, MasayukiNational Institutes of Natural Sciences (NINS) (author)
Dai, FeiPrinceton University,Massachusetts Institute of Technology (MIT) (author)
Luque, RafaelUniversidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias (author)
Persson, Carina,1964Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)carina64 (author)
Fridlund, Malcolm,1952Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)malfri (author)
Johnson, Marshall C.Las Cumbres Observatory Global Telescope Network, Inc (author)
Korth, JudithUniversität zu Köln,University of Cologne (author)
Livingston, John H.University of Tokyo, Japan (author)
Grziwa, SaschaUniversität zu Köln,University of Cologne (author)
Mathur, SavitaInstituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna (author)
Hatzes, Artie P.Thüringer Landessternwarte Tautenburg (author)
Prieto-Arranz, JorgeUniversidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias (author)
Nespral, DavidInstituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna (author)
Hidalgo, DiegoUniversidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias (author)
Hjorth, MariaÅrhus Universitet,Aarhus University (author)
Albrecht, SimonÅrhus Universitet,Aarhus University (author)
Van Eylen, VincentPrinceton University (author)
Lam, Kristine W. F.Technische Universität Berlin (author)
Cochran, William D.The University of Texas at Austin, USA (author)
Esposito, MassimilianoThüringer Landessternwarte Tautenburg (author)
Csizmadia, SzilardDeutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
Guenther, Eike W.Thüringer Landessternwarte Tautenburg (author)
Kabath, PetrCzech Academy of Sciences (author)
Blay, PereUniversidad Internacional de Valencia,Valencian International University (author)
Brahm, RafaelInstituto Milenio de Astrofísica,Millennium Institute of Astrophysics,Universidad Adolfo Ibanez,Adolfo Ibáñez University (author)
Jordan, AndresUniversidad Adolfo Ibanez,Adolfo Ibáñez University,Instituto Milenio de Astrofísica,Millennium Institute of Astrophysics (author)
Espinoza, NestorMax Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
Rojas, FelipeInstituto Milenio de Astrofísica,Millennium Institute of Astrophysics,Pontificia Universidad Catolica de Chile (author)
Casasayas Barris, NuriaInstituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna (author)
Rodler, FlorianEuropean Southern Observatory Santiago (author)
Alonso Sobrino, RoiUniversidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias (author)
Cabrera, J.Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
Carleo, IlariaWesleyan University (author)
Chaushev, AlexanderTechnische Universität Berlin (author)
de Leon, JeromeUniversity of Tokyo, Japan (author)
Eigmueller, PhilippDeutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
Endl, MichaelThe University of Texas at Austin, USA (author)
Erikson, AndersDeutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
Fukui, AkihikoNational Institutes of Natural Sciences (NINS) (author)
Georgieva, Iskra,1987Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)iskrag (author)
Gonzalez-Cuesta, LuciaInstituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna (author)
Knudstrup, EmilÅrhus Universitet,Aarhus University (author)
Lund, Mikkel N.Århus Universitet,Aarhus University (author)
Montanes Rodriguez, PilarInstituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna (author)
Murgas, FelipeUniversidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias (author)
Narita, NorioInstituto de Astrofísica de Canarias,Japan Science and Technology Agency (JST),National Institutes of Natural Sciences (NINS) (author)
Niraula, PrajwalMassachusetts Institute of Technology (MIT) (author)
Paetzold, MartinUniversität zu Köln,University of Cologne (author)
Rauer, HeikeTechnische Universität Berlin,Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
Redfield, SethWesleyan University (author)
Ribas, IgnasiAgencia Estatal Consejo Superior de Investigaciones Científicas,Spanish National Research Council,Institut d'Estudis Espacials de Catalunya (IEEC),Institute of Space Studies of Catalonia (IEEC) (author)
Skarka, MarekCzech Academy of Sciences,Masarykova Univerzita,Masaryk University (author)
Smith, Alexis M. S.Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
Subjak, JanoCzech Academy of Sciences,Univerzita Karlova,Charles University (author)
Instituto de Astrofísica de CanariasUniversidad de la Laguna (creator_code:org_t)

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In:Monthly Notices of the Royal Astronomical Society: Oxford University Press (OUP)497:4, s. 4423-44350035-87111365-2966

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By the author/editor: Nowak, Grzegorz; Palle, Enric; Gandolfi, Davide; Deeg, Hans J.; Hirano, Teruyuki; Barragan, Oscar; show more...; Kuzuhara, Masayu ...; Dai, Fei; Luque, Rafael; Persson, Carina, ...; Fridlund, Malcol ...; Johnson, Marshal ...; Korth, Judith; Livingston, John ...; Grziwa, Sascha; Mathur, Savita; Hatzes, Artie P.; Prieto-Arranz, J ...; Nespral, David; Hidalgo, Diego; Hjorth, Maria; Albrecht, Simon; Van Eylen, Vince ...; Lam, Kristine W. ...; Cochran, William ...; Esposito, Massim ...; Csizmadia, Szila ...; Guenther, Eike W ...; Kabath, Petr; Blay, Pere; Brahm, Rafael; Jordan, Andres; Espinoza, Nestor; Rojas, Felipe; Casasayas Barris ...; Rodler, Florian; Alonso Sobrino, ...; Cabrera, J.; Carleo, Ilaria; Chaushev, Alexan ...; de Leon, Jerome; Eigmueller, Phil ...; Endl, Michael; Erikson, Anders; Fukui, Akihiko; Georgieva, Iskra ...; Gonzalez-Cuesta, ...; Knudstrup, Emil; Lund, Mikkel N.; Montanes Rodrigu ...; Murgas, Felipe; Narita, Norio; Niraula, Prajwal; Paetzold, Martin; Rauer, Heike; Redfield, Seth; Ribas, Ignasi; Skarka, Marek; Smith, Alexis M. ...; Subjak, Jano; show less...

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NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...; and Astronomy Astrop ...

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