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:

Authors	Institution or Email of Authors	Author's ORCID iD
Hjorth, M.	Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, Denmark	UNSPECIFIED
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, Japan	UNSPECIFIED
Albrecht, S.	Stellar Astrophysics Centre, Deparment of Physics and Astronomy, Aarhus University, Ny Munkegrade 120, 8000 Aarhus C, Denmark	UNSPECIFIED
Gandolfi, D.	Dipartimento di Fisica, Universita di Torino, via P. Giuria 1, I-10125 Torino, Italy	UNSPECIFIED
Dai, Fei	Department 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, USA	UNSPECIFIED
Alonso, R.	Instituto de Astrofisica de Canarias, E-38205 La Laguna, Tenerife, Spain	UNSPECIFIED
Barragan, O.	Dipartimento di Fisica, Universita di Torino	UNSPECIFIED
Esposito, M.	Thüringer Landessternwarte Tautenburg, 07778, Tautenburg, Germany	UNSPECIFIED
Kuzuhara, M.	Astrobiology Center, National Institutes of Natural Sciences, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan	UNSPECIFIED
Lam, K. W. F.	Zentrum für Astronomie und Astrophysik, Technische Universität Berlin, Hardenbergstr. 36, D-10623 Berlin, Germany	UNSPECIFIED
Livingston, J.	Department of Astronomy, The University of Tokyo, 7-3-1 Bunkyo-ku, Tokyo 113-0033, Japan	UNSPECIFIED
Montanes Rodriguez, P.	Departamento de Astrofisica, Universidad de La Laguna, 38206 Tenerife, Spain	UNSPECIFIED
Narita, N.	Department of Astronomy, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan	UNSPECIFIED
Nowak, G.	Instituto de Astrofisica de Canarias (IAC), Via Lactea s/n 38200, La Laguna, Spain	UNSPECIFIED
Prieto-Arranz, J.	Instituto de Astrofísica de Canarias, 38205 La Laguna, Tenerife, Spain \| Departamento de Astrofisica, Universidad de La Laguna, 38206 La Laguna, Spain	UNSPECIFIED
Redfield, S.	Astronomy Department and Van Vleck Observatory, Wesleyan University, Middletown, CT 06459, USA	UNSPECIFIED
Rodler, F.	Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA	UNSPECIFIED
Van Eylen, V.	Department of Astrophysical Sciences, Princeton University, 4 Ivy Lane, Princeton, NJ 08544, USA	UNSPECIFIED
Winn, J. N.	Princeton University, Department of Astrophysical Sciences, 4 Ivy Lane, Princeton, NJ 08544 USA	UNSPECIFIED
Antoniciello, G.	Dipartimento di Fisica, Università di Torino, via P. Giuria 1, I-10125 Torino, Italy	UNSPECIFIED
Cabrera Perez, Juan	UNSPECIFIED	https://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, USA	UNSPECIFIED
Csizmadia, S.	UNSPECIFIED	UNSPECIFIED
De Leon, J.	Department of Astronomy, Graduate School of Science, The University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, Japan	UNSPECIFIED
Deeg, H	Instituto de Astrofısica de Canarias (IAC), 38205 La Laguna, Spain	UNSPECIFIED
Eigmüller, Philipp	UNSPECIFIED	https://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, USA	UNSPECIFIED
Erikson, A	UNSPECIFIED	UNSPECIFIED
Fridlund, M.	Leiden Observatory, University of Leiden, P.O. Box 9513, NL-2300 RA, Leiden, The Netherlands	UNSPECIFIED
Grziwa, S.	Rheinisches Institut für Umweltforschung an der Universitaet zu Koeln, Aachener Strasse 209, 50931 Koeln, Germany	UNSPECIFIED
Guenther, E.	Thueringer Landessternwarte, Sternwarte 5, Tautenburg 5, D-07778 Tautenburg, Germany	UNSPECIFIED
Hatzes, A.	Thueringer Landessternwarte, Sternwarte 5, Tautenburg 5, D-07778 Tautenburg, Germany	UNSPECIFIED
Heeren, P.	ZAH-Landessternwarte Heidelberg, Königstuhl 12, D-69117 Heidelberg, Germanx	UNSPECIFIED
Hidalgo, D.	Instituto de Astrof´ısica de Canarias, E-38205 La Laguna, Tenerife, Spain	UNSPECIFIED
Korth, J.	Rheinisches Institut für Umweltforschung an der Universitaet zu Koeln, Aachener Strasse 209, D-50931 Koeln, Germany	UNSPECIFIED
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, Spain	UNSPECIFIED
Palle, E.	Instituto de Astrofısica de Canarias, 38205 La Laguna, Tenerife, USA	UNSPECIFIED
Patzold, M	Rheinisches Institut fur Umweltforschung, Abteilung Planetenforschung an der Universitat zu Koln, Aachener Strasse 209, 50931 Koln, Germany	UNSPECIFIED
Persson, C. M.	Department of Earth and Space Sciences, Chalmers University of Technology, Onsala Space Observatory, 439 92, Onsala, Sweden	UNSPECIFIED
Rauer, H	UNSPECIFIED	UNSPECIFIED
Smith, Alexis	UNSPECIFIED	https://orcid.org/0000-0002-2386-4341
Trifonov, T.	Max-Planck-Institut für Astronomie, Königstuhl 17, D-69117 Heidelberg, Germany	UNSPECIFIED

Date:

2019

Journal or Publication Title:

Monthly Notices of the Royal Astronomical Society

Refereed publication:

Yes

Open Access:

Gold Open Access:

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 Exploration

DLR - Research area:

Raumfahrt

DLR - Program:

R EW - Space Exploration

DLR - Research theme (Project):

R - Projekt COROT Beteiligung (old)

Location:

Berlin-Adlershof

Institutes and Institutions:

Institute of Planetary Research > Extrasolar Planets and Atmospheres
Institute of Planetary Research > Leitungsbereich PF

Deposited By:

Smith, Dr Alexis M S

Deposited On:

14 Jun 2019 09:59

Last Modified:

28 Mar 2023 23:53

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