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K2-290: a warm Jupiter and a mini-Neptune in a triple-star system

Hjorth, M. and Justesen, A. B. and Hirano, T. and Albrecht, S. and Gandolfi, D. and Dai, Fei and Alonso, R. and Barragan, O. and Esposito, M. and Kuzuhara, M. and Lam, K. W. F. and Livingston, J. and Montanes Rodriguez, P. and Narita, N. and Nowak, G. and Prieto-Arranz, J. and Redfield, S. and Rodler, F. and Van Eylen, V. and Winn, J. N. and Antoniciello, G. and Cabrera Perez, Juan and Cochran, W. D. and Csizmadia, S. and De Leon, J. and Deeg, H and Eigmüller, Philipp and Endl, M and Erikson, A and Fridlund, M. and Grziwa, S. and Guenther, E. and Hatzes, A. and Heeren, P. and Hidalgo, D. and Korth, J. and Luque, R. and Nespral, D. and Palle, E. and Patzold, M and Persson, C. M. and Rauer, H and Smith, Alexis and Trifonov, T. (2019) K2-290: a warm Jupiter and a mini-Neptune in a triple-star system. Monthly Notices of the Royal Astronomical Society, 484, pp. 3522-3536. Oxford University Press. DOI: 10.1093/mnras/stz139 ISSN 0035-8711

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Abstract

We report the discovery of two transiting planets orbiting K2-290 (EPIC 249624646), a bright (V = 11.11) late F-type star residing in a triple-star system. It was observed during Campaign 15 of the K2 mission, and in order to confirm and characterize the system, follow-up spectroscopy and AO imaging were carried out using the FIES, HARPS, HARPS-N, and IRCS instruments. From AO imaging and Gaia data we identify two M-dwarf companions at a separation of 113 ± 2 and 2467_{-155}^{+177} au. From radial velocities, K2 photometry, and stellar characterization of the host star, we find the inner planet to be a mini-Neptune with a radius of 3.06 ± 0.16 R⊕ and an orbital period of P = 9.2 d. The radius of the mini-Neptune suggests that the planet is located above the radius valley, and with an incident flux of F ˜ 400 F⊕, it lies safely outside the super-Earth desert. The outer warm Jupiter has a mass of 0.774 ± 0.047 MJ and a radius of 1.006 ± 0.050 RJ, and orbits the host star every 48.4 d on an orbit with an eccentricity e < 0.241. Its mild eccentricity and mini-Neptune sibling suggest that the warm Jupiter originates from in situ formation or disc migration.

Item URL in elib:https://elib.dlr.de/127356/
Document Type:Article
Title:K2-290: a warm Jupiter and a mini-Neptune in a triple-star system
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Hjorth, M.Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, DenmarkUNSPECIFIED
Justesen, A. B.Stellar Astrophysics Centre, Deparment of Physics and Astronomy,UNSPECIFIED
Hirano, T.Department of Earth and Planetary Sciences, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8551, JapanUNSPECIFIED
Albrecht, S.Stellar Astrophysics Centre, Deparment of Physics and Astronomy, Aarhus University, Ny Munkegrade 120, 8000 Aarhus C, DenmarkUNSPECIFIED
Gandolfi, D.Dipartimento di Fisica, Universita di Torino, via P. Giuria 1, I-10125 Torino, ItalyUNSPECIFIED
Dai, FeiDepartment of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA ; Department of Astrophysical Sciences, Princeton University, 4 Ivy Lane, Princeton, NJ 08544, USAUNSPECIFIED
Alonso, R.Instituto de Astrofisica de Canarias, E-38205 La Laguna, Tenerife, SpainUNSPECIFIED
Barragan, O.Dipartimento di Fisica, Universita di TorinoUNSPECIFIED
Esposito, M.Thüringer Landessternwarte Tautenburg, 07778, Tautenburg, GermanyUNSPECIFIED
Kuzuhara, M.Astrobiology Center, National Institutes of Natural Sciences, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, JapanUNSPECIFIED
Lam, K. W. F.Zentrum für Astronomie und Astrophysik, Technische Universität Berlin, Hardenbergstr. 36, D-10623 Berlin, GermanyUNSPECIFIED
Livingston, J.Department of Astronomy, The University of Tokyo, 7-3-1 Bunkyo-ku, Tokyo 113-0033, JapanUNSPECIFIED
Montanes Rodriguez, P.Departamento de Astrofisica, Universidad de La Laguna, 38206 Tenerife, SpainUNSPECIFIED
Narita, N.Department of Astronomy, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, JapanUNSPECIFIED
Nowak, G.Instituto de Astrofisica de Canarias (IAC), Via Lactea s/n 38200, La Laguna, SpainUNSPECIFIED
Prieto-Arranz, J.Instituto de Astrofísica de Canarias, 38205 La Laguna, Tenerife, Spain | Departamento de Astrofisica, Universidad de La Laguna, 38206 La Laguna, SpainUNSPECIFIED
Redfield, S.Astronomy Department and Van Vleck Observatory, Wesleyan University, Middletown, CT 06459, USAUNSPECIFIED
Rodler, F.Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USAUNSPECIFIED
Van Eylen, V.Department of Astrophysical Sciences, Princeton University, 4 Ivy Lane, Princeton, NJ 08544, USAUNSPECIFIED
Winn, J. N.Princeton University, Department of Astrophysical Sciences, 4 Ivy Lane, Princeton, NJ 08544 USAUNSPECIFIED
Antoniciello, G.Dipartimento di Fisica, Università di Torino, via P. Giuria 1, I-10125 Torino, ItalyUNSPECIFIED
Cabrera Perez, JuanJuan.Cabrera (at) dlr.deUNSPECIFIED
Cochran, W. D.Department of Astronomy and McDonald Observatory, University of Texas at Austin, 2515 Speedway, Stop C1400, Austin, TX 78712, USAUNSPECIFIED
Csizmadia, S.szilard.csizmadia (at) dlr.deUNSPECIFIED
De Leon, J.Department of Astronomy, Graduate School of Science, The University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, JapanUNSPECIFIED
Deeg, HInstituto de Astrofısica de Canarias (IAC), 38205 La Laguna, SpainUNSPECIFIED
Eigmüller, PhilippPhilipp.Eigmueller (at) dlr.dehttps://orcid.org/0000-0003-4096-0594
Endl, MDepartment 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, University of Leiden, P.O. Box 9513, NL-2300 RA, Leiden, The NetherlandsUNSPECIFIED
Grziwa, S.Rheinisches Institut für Umweltforschung an der Universitaet zu Koeln, Aachener Strasse 209, 50931 Koeln, GermanyUNSPECIFIED
Guenther, E.Thueringer Landessternwarte, Sternwarte 5, Tautenburg 5, D-07778 Tautenburg, GermanyUNSPECIFIED
Hatzes, A.Thueringer Landessternwarte, Sternwarte 5, Tautenburg 5, D-07778 Tautenburg, GermanyUNSPECIFIED
Heeren, P.ZAH-Landessternwarte Heidelberg, Königstuhl 12, D-69117 Heidelberg, GermanxUNSPECIFIED
Hidalgo, D.Instituto de Astrof´ısica de Canarias, E-38205 La Laguna, Tenerife, SpainUNSPECIFIED
Korth, J.Rheinisches Institut für Umweltforschung an der Universitaet zu Koeln, Aachener Strasse 209, D-50931 Koeln, GermanyUNSPECIFIED
Luque, R.Departamento de Astrofísica, Universidad de La Laguna, E-38206,UNSPECIFIED
Nespral, D.Instituto de Astrofísica de Canarias, 38205 La Laguna, Tenerife, Spain | Departamento de Astrofisica, Universidad de La Laguna, 38206 La Laguna, SpainUNSPECIFIED
Palle, E.Instituto de Astrofısica de Canarias, 38205 La Laguna, Tenerife, USAUNSPECIFIED
Patzold, MRheinisches Institut fur Umweltforschung, Abteilung Planetenforschung an der Universitat zu Koln, Aachener Strasse 209, 50931 Koln, GermanyUNSPECIFIED
Persson, C. M.Department of Earth and Space Sciences, Chalmers University of Technology, Onsala Space Observatory, 439 92, Onsala, SwedenUNSPECIFIED
Rauer, Hheiker.rauer (at) dlr.deUNSPECIFIED
Smith, AlexisAlexis.Smith (at) dlr.deUNSPECIFIED
Trifonov, T.Max-Planck-Institut für Astronomie, Königstuhl 17, D-69117 Heidelberg, GermanyUNSPECIFIED
Date:2019
Journal or Publication Title:Monthly Notices of the Royal Astronomical Society
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:484
DOI :10.1093/mnras/stz139
Page Range:pp. 3522-3536
Publisher:Oxford University Press
ISSN:0035-8711
Status:Published
Keywords:planets and satellites: detection, planets and satellites: formation, planets and satellites: individual: K2-290, planets and satellites: individual: EPIC 249624646
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:14 Jun 2019 09:59
Last Modified:06 Sep 2019 15:17

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