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K2-295 b and K2-237 b: Two Transiting Hot Jupiters

Smith, Alexis and Csizmadia, Szilard and Gandolfi, D. and Albrecht, S. and Alonso, R. and Barragán, O. and Cabrera Perez, Juan and Cochran, W.D. and Dai, F. and Deeg, H. and Eigmüller, Philipp and Endl, M. and Erikson, A and Fridlund, M. and Fukui, A. and Grziwa, S. and Guenther, E.W. and Hatzes, A.P. and Hidalgo, D. and Hirano, T. and Korth, J. and Kuzuhara, M. and Livingston, J. and Narita, N. and Nespral, D. and Niraula, P. and Nowak, G. and Palle, E. and Pätzold, M. and Persson, C.M. and Prieto-Arranz, J. and Rauer, H and Redfield, S. and Ribas, I. and Van Eylen, V. (2019) K2-295 b and K2-237 b: Two Transiting Hot Jupiters. Acta Astronomica, 69, pp. 135-158. Copernicus Foundation for Polish Astronomy. DOI: 10.32023/0001-5237/69.2.3 ISSN 0001-5237

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Abstract

We report the discovery from K2 of two transiting hot Jupiter systems. K2-295 (observed in Campaign 8) is a K5 dwarf which hosts a planet slightly smaller than Jupiter, orbiting with a period of 4.0 d. We have made an independent discovery of K2-237 b (Campaign 11), which orbits an F9 dwarf every 2.2 d and has an inflated radius 60-70% larger than that of Jupiter. We use high-precision radial velocity measurements, obtained using the HARPS and FIES spectrographs, to measure the planetary masses. We find that K2-295 b has a similar mass to Saturn, while K2-237 b is a little more massive than Jupiter.

Item URL in elib:https://elib.dlr.de/129159/
Document Type:Article
Title:K2-295 b and K2-237 b: Two Transiting Hot Jupiters
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Smith, AlexisAlexis.Smith (at) dlr.deUNSPECIFIED
Csizmadia, Szilardszilard.csizmadia (at) dlr.deUNSPECIFIED
Gandolfi, D.Dipartimento di Fisica, Universitá di Torino, Via P. Giuria 1, I-10125, Torino, ItalyUNSPECIFIED
Albrecht, S.Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, DenmarkUNSPECIFIED
Alonso, R.Instituto de Astrofísica de Canarias (IAC), 38205 La Laguna, Tenerife, Spain; Departamento de Astrofísica, Universidad de La Laguna (ULL), 38206 La Laguna, Tenerife, SpainUNSPECIFIED
Barragán, O.Dipartimento di Fisica, Universitá di Torino, Via P. Giuria 1, I-10125, Torino, ItalyUNSPECIFIED
Cabrera Perez, JuanJuan.Cabrera (at) dlr.dehttps://orcid.org/0000-0001-6653-5487
Cochran, W.D.Department of Astronomy and McDonald Observatory, University of Texas at Austin, 2515 Speedway, Stop C1400, Austin, TX 78712, USAUNSPECIFIED
Dai, F.Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139,USAUNSPECIFIED
Deeg, H.Instituto de Astrofísica de Canarias (IAC), 38205 La Laguna, Tenerife, Spain; Departamento de Astrofísica, Universidad de La Laguna (ULL), 38206 La Laguna, Tenerife, SpainUNSPECIFIED
Eigmüller, PhilippPhilipp.Eigmueller (at) dlr.dehttps://orcid.org/0000-0003-4096-0594
Endl, M.Department of Astronomy and McDonald Observatory, University of Texas at Austin, 2515 Speedway, Stop C1400, Austin, TX 78712, USAUNSPECIFIED
Erikson, Aanders.erikson (at) dlr.deUNSPECIFIED
Fridlund, M.Leiden Observatory, Leiden University, 2333CA Leiden, The Netherlands; Chalmers University of Technology, Department of Space, Earth and Environment, Onsala Space Observatory, SE-439 92 Onsala, Sweden; Instituto de Astrofísica de Canarias (IAC), 38205 LaUNSPECIFIED
Fukui, A.Subaru Telescope Okayama Branch Office, National Astronomical Observatory of Japan, NINS, 3037-5 Honjo, Kamogata, Asakuchi, Okayama 719-0232, Japan; Instituto de Astrofísica de Canarias (IAC), 38205 La Laguna, Tenerife, SpainUNSPECIFIED
Grziwa, S.Rheinisches Institut für Umweltforschung an der Universität zu Köln, Aachener Strasse 209, 50931 Köln, GermanyUNSPECIFIED
Guenther, E.W.Thüringer Landessternwarte Tautenburg, Sternwarte 5, 07778 Tautenburg, GermanyUNSPECIFIED
Hatzes, A.P.Thüringer Landessternwarte Tautenburg, Sternwarte 5, 07778 Tautenburg, GermanyUNSPECIFIED
Hidalgo, D.Instituto de Astrofísica de Canarias (IAC), 38205 La Laguna, Tenerife, Spain; Departamento de Astrofísica, Universidad de La Laguna (ULL), 38206 La Laguna, Tenerife, SpainUNSPECIFIED
Hirano, T.Department of Earth and Planetary Sciences, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8551, JapanUNSPECIFIED
Korth, J.Rheinisches Institut für Umweltforschung an der Universität zu Köln, Aachener Strasse 209, 50931 Köln, GermanyUNSPECIFIED
Kuzuhara, M.Astrobiology Center, NINS, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan; National Astronomical Observatory of Japan, NINS, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, JapanUNSPECIFIED
Livingston, J.Department of Astronomy, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, JapanUNSPECIFIED
Narita, N.Department of Astronomy, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan; Astrobiology Center, NINS, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan; National Astronomical Observatory of Japan, NINS, 2-21-1 Osawa, Mitaka, Tokyo 181-8588UNSPECIFIED
Nespral, D.Instituto de Astrofísica de Canarias (IAC), 38205 La Laguna, Tenerife, Spain; Departamento de Astrofísica, Universidad de La Laguna (ULL), 38206 La Laguna, Tenerife, SpainUNSPECIFIED
Niraula, P.Astronomy Department and Van Vleck Observatory, Wesleyan University, Middletown, CT 06459, USAUNSPECIFIED
Nowak, G.Instituto de Astrofísica de Canarias (IAC), 38205 La Laguna, Tenerife, Spain; Departamento de Astrofísica, Universidad de La Laguna (ULL), 38206 La Laguna, Tenerife, SpainUNSPECIFIED
Palle, E.Instituto de Astrofísica de Canarias (IAC), 38205 La Laguna, Tenerife, Spain; Departamento de Astrofísica, Universidad de La Laguna (ULL), 38206 La Laguna, Tenerife, SpainUNSPECIFIED
Pätzold, M.Rheinisches Institut für Umweltforschung an der Universität zu Köln, Aachener Strasse 209, 50931 Köln, GermanyUNSPECIFIED
Persson, C.M.Chalmers University of Technology, Department of Space, Earth and Environment, Onsala Space Observatory, SE-439 92 Onsala, SwedenUNSPECIFIED
Prieto-Arranz, J.Instituto de Astrofísica de Canarias (IAC), 38205 La Laguna, Tenerife, Spain; Departamento de Astrofísica, Universidad de La Laguna (ULL), 38206 La Laguna, Tenerife, SpainUNSPECIFIED
Rauer, Hheiker.rauer (at) dlr.deUNSPECIFIED
Redfield, S.Astronomy Department and Van Vleck Observatory, Wesleyan University, Middletown, CT 06459, USAUNSPECIFIED
Ribas, I.Institut de Ciéncies de l'Espai (ICE, CSIC), Campus UAB, Can Magrans s/n, 08193 Bellaterra, Spain; Institut d'Estudis Espacials de Catalunya (IEEC), 08034 Barcelona, SpainUNSPECIFIED
Van Eylen, V.Leiden Observatory, Leiden University, 2333CA Leiden, The Netherlands)UNSPECIFIED
Date:2019
Journal or Publication Title:Acta Astronomica
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:69
DOI :10.32023/0001-5237/69.2.3
Page Range:pp. 135-158
Publisher:Copernicus Foundation for Polish Astronomy
ISSN:0001-5237
Status:Published
Keywords:Planetary systems, Planets and satellites: detection, Planets and satellites: individual: K2-295, K2-237
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):R - Projekt COROT Beteiligung
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Extrasolar Planets and Atmospheres
Institute of Planetary Research > Leitungsbereich PF
Deposited By: Smith, Alexis
Deposited On:01 Oct 2019 10:13
Last Modified:01 Oct 2019 10:13

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