Detection and characterization of an ultra-dense sub-Neptunian planet orbiting the Sun-like star K2-292

Luque, R. and Nowak, G. and Palle, E. and Dai, F. and Kaminski, A. and Nagel, E. and Hidalgo, D. and Bauer, F. and Lafarga, M. and Livingston, J. and Barragan, O. and Hirano, T. and Fridlund, M. and Gandolfi, D. and Justesen, A. B. and Hjorth, M. and Van Eylen, V. and Winn, J. N. and Esposito, M. and Morales, J. C. and Albrecht, S. and Alonso, R. and Amado, P. J. and Beck, P. and Caballero, J. A. and Cabrera Perez, Juan and Cochran, W. D. and Csizmadia, Szilard and Deeg, H. and Eigmüller, Philipp and Endl, M. and Erikson, A and Fukui, A. and Grziwa, S. and Guenther, E. W. and Hatzes, A. P. and Knudstrup, E. and Korth, J. and Lam, K. W. F. and Lund, M. N. and Mathur, S. and Montanes-Rodriguez, P. and Narita, N. and Nespral, D. and Niraula, P. and Patzold, M. and Persson, C. M. and Prieto-Arranz, J. and Quirrenbach, A. and Rauer, H and Redfield, S. and Reiners, A. and Ribas, I. and Smith, Alexis (2019) Detection and characterization of an ultra-dense sub-Neptunian planet orbiting the Sun-like star K2-292. Astronomy & Astrophysics, 623, A114. EDP Sciences. doi: 10.1051/0004-6361/201834952. ISSN 0004-6361.

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Abstract

We present the discovery and characterization of a new transiting planet from Campaign 17 of the Kepler extended mission K2. The planet K2-292 b is a warm sub-Neptune on a 17 day orbit around a bright (V = 9.9 mag) solar-like G3 V star with a mass and radius of M⋆ = 1.00 ± 0.03 M⊙ and R⋆ = 1.09 ± 0.03 R⊙, respectively. We modeled simultaneously the K2 photometry and CARMENES spectroscopic data and derived a radius of Rp=2.63−0.10+0.12 R⊕ and mass of Mp=24.5−4.4+4.4 M⊕, yielding a mean density of ρp=7.4−1.5+1.6 g cm−3, which makes it one of the densest sub-Neptunian planets known to date. We also detected a linear trend in the radial velocities of K2-292 (γ˙RV = −0.40−0.07+0.07 m s−1 d−1) that suggests a long-period companion with a minimum mass on the order of 33 M⊕. If confirmed, it would support a formation scenario of K2-292 b by migration caused by Kozai-Lidov oscillations.

Item URL in elib:

https://elib.dlr.de/127410/

Document Type:

Article

Title:

Detection and characterization of an ultra-dense sub-Neptunian planet orbiting the Sun-like star K2-292

Authors:

Authors	Institution or Email of Authors	Author's ORCID iD	ORCID Put Code
Luque, R.	Instituto de Astrofisica de Canarias (IAC), 38205, La Laguna, Tenerife, Spain );; Departamento de Astrofisica, Universidad de La Laguna (ULL), 38206, La Laguna, Tenerife, Spain	UNSPECIFIED	UNSPECIFIED
Nowak, G.	Instituto de Astrofisica de Canarias (IAC), 38205, La Laguna, Tenerife, Spain; Departamento de Astrofisica, Universidad de La Laguna (ULL), 38206, La Laguna, Tenerife, Spain	UNSPECIFIED	UNSPECIFIED
Palle, E.	Instituto de Astrofisica de Canarias (IAC), 38205, La Laguna, Tenerife, Spain; Departamento de Astrofisica, Universidad de La Laguna (ULL), 38206, La Laguna, Tenerife, Spain	UNSPECIFIED	UNSPECIFIED
Dai, F.	Department of Astrophysical Sciences, Princeton University, 4 Ivy Lane, Princeton, NJ, 08544, USA; Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA	UNSPECIFIED	UNSPECIFIED
Kaminski, A.	Landessternwarte, Zentrum fur Astronomie der Universtat Heidelberg, Konigstuhl 12, 69117, Heidelberg, Germany	UNSPECIFIED	UNSPECIFIED
Nagel, E.	Hamburger Sternwarte, Gojenbergsweg 112, 21029, Hamburg, Germany	UNSPECIFIED	UNSPECIFIED
Hidalgo, D.	Instituto de Astrofisica de Canarias (IAC), 38205, La Laguna, Tenerife, Spain; Departamento de Astrofisica, Universidad de La Laguna (ULL), 38206, La Laguna, Tenerife, Spain	UNSPECIFIED	UNSPECIFIED
Bauer, F.	Instituto de Astrofisica de Andalucia (IAA-CSIC), Glorieta de la Astronomia s/n, 18008, Granada, Spain	UNSPECIFIED	UNSPECIFIED
Lafarga, M.	Institut de Ciencies de l'Espai (ICE, CSIC), C/Can Magrans, s/n, Campus UAB, 08193, Bellaterra, Spain; Institut d'Estudis Espacials de Catalunya (IEEC), 08034, Barcelona, Spain	UNSPECIFIED	UNSPECIFIED
Livingston, J.	Department of Astronomy, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan	UNSPECIFIED	UNSPECIFIED
Barragan, O.	Dipartimento di Fisica, Universita di Torino, Via P. Giuria 1, 10125, Torino, Italy	UNSPECIFIED	UNSPECIFIED
Hirano, T.	Department of Earth and Planetary Sciences, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8551, Japan	UNSPECIFIED	UNSPECIFIED
Fridlund, M.	Department of Space, Earth and Environment, Chalmers University of Technology, Onsala Space Observatory, 439 92, Onsala, Sweden; Leiden Observatory, Leiden University, 2333CA, Leiden, The Netherlands	UNSPECIFIED	UNSPECIFIED
Gandolfi, D.	Department of Earth and Planetary Sciences, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8551, Japan	UNSPECIFIED	UNSPECIFIED
Justesen, A. B.	Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, 8000, Aarhus C, Denmark	UNSPECIFIED	UNSPECIFIED
Hjorth, M.	Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, 8000, Aarhus C, Denmark	UNSPECIFIED	UNSPECIFIED
Van Eylen, V.	Department of Astrophysical Sciences, Princeton University, 4 Ivy Lane, Princeton, NJ, 08544, USA	UNSPECIFIED	UNSPECIFIED
Winn, J. N.	Department of Astrophysical Sciences, Princeton University, 4 Ivy Lane, Princeton, NJ, 08544, USA	UNSPECIFIED	UNSPECIFIED
Esposito, M.	Thuringer Landessternwarte Tautenburg, Sternwarte 5, 07778, Tautenburg, Germany	UNSPECIFIED	UNSPECIFIED
Morales, J. C.	Institut de Ciencies de l'Espai (ICE, CSIC), C/Can Magrans, s/n, Campus UAB, 08193, Bellaterra, Spain; Institut d'Estudis Espacials de Catalunya (IEEC), 08034, Barcelona, Spain	UNSPECIFIED	UNSPECIFIED
Albrecht, S.	Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, 8000, Aarhus C, Denmark	UNSPECIFIED	UNSPECIFIED
Alonso, R.	Instituto de Astrofisica de Canarias (IAC), 38205, La Laguna, Tenerife, Spain; Departamento de Astrofisica, Universidad de La Laguna (ULL), 38206, La Laguna, Tenerife, Spain	UNSPECIFIED	UNSPECIFIED
Amado, P. J.	Instituto de Astrofisica de Andalucia (IAA-CSIC), Glorieta de la Astronomia s/n, 18008, Granada, Spain	UNSPECIFIED	UNSPECIFIED
Beck, P.	Instituto de Astrofisica de Canarias (IAC), 38205, La Laguna, Tenerife, Spain; Departamento de Astrofisica, Universidad de La Laguna (ULL), 38206, La Laguna, Tenerife, Spain	UNSPECIFIED	UNSPECIFIED
Caballero, J. A.	Centro de Astrobiologia (CSIC-INTA), ESAC campus, Camino Bajo del Castillo s/n, 28692, Villanueva de la Canada, Madrid, Spain	UNSPECIFIED	UNSPECIFIED
Cabrera Perez, Juan	UNSPECIFIED	https://orcid.org/0000-0001-6653-5487	UNSPECIFIED
Cochran, W. D.	Department of Astronomy and McDonald Observatory, University of Texas at Austin, 2515 Speedway, Stop C1400, Austin, TX, 78712, USA	UNSPECIFIED	UNSPECIFIED
Csizmadia, Szilard	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Deeg, H.	Instituto de Astrofisica de Canarias (IAC), 38205, La Laguna, Tenerife, Spain; Departamento de Astrofisica, Universidad de La Laguna (ULL), 38206, La Laguna, Tenerife, Spain	UNSPECIFIED	UNSPECIFIED
Eigmüller, Philipp	UNSPECIFIED	https://orcid.org/0000-0003-4096-0594	UNSPECIFIED
Endl, M.	Department of Astronomy and McDonald Observatory, University of Texas at Austin, 2515 Speedway, Stop C1400, Austin, TX, 78712, USA	UNSPECIFIED	UNSPECIFIED
Erikson, A	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Fukui, A.	Okayama Astrophysical Observatory, National Astronomical Observatory of Japan, NINS, Asakuchi, Okayama, 719-0232, Japan	UNSPECIFIED	UNSPECIFIED
Grziwa, S.	Rheinisches Institut fur Umweltforschung an der Universitat zu Koln, Aachener Strasse 209, 50931, Koln, Germany	UNSPECIFIED	UNSPECIFIED
Guenther, E. W.	Thuringer Landessternwarte Tautenburg, Sternwarte 5, 07778, Tautenburg, Germany	UNSPECIFIED	UNSPECIFIED
Hatzes, A. P.	Thuringer Landessternwarte Tautenburg, Sternwarte 5, 07778, Tautenburg, Germany	UNSPECIFIED	UNSPECIFIED
Knudstrup, E.	Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, 8000, Aarhus C, Denmark	UNSPECIFIED	UNSPECIFIED
Korth, J.	Rheinisches Institut fur Umweltforschung an der Universitat zu Koln, Aachener Strasse 209, 50931, Koln, Germany	UNSPECIFIED	UNSPECIFIED
Lam, K. W. F.	Zentrum fur Astronomie und Astrophysik, Technische Universitat Berlin, Hardenbergstr. 36, 10623, Berlin, Germany	UNSPECIFIED	UNSPECIFIED
Lund, M. N.	Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, 8000, Aarhus C, Denmark	UNSPECIFIED	UNSPECIFIED
Mathur, S.	Instituto de Astrofisica de Canarias (IAC), 38205, La Laguna, Tenerife, Spain; Departamento de Astrofisica, Universidad de La Laguna (ULL), 38206, La Laguna, Tenerife, Spain	UNSPECIFIED	UNSPECIFIED
Montanes-Rodriguez, P.	Instituto de Astrofisica de Canarias (IAC), 38205, La Laguna, Tenerife, Spain; Departamento de Astrofisica, Universidad de La Laguna (ULL), 38206, La Laguna, Tenerife, Spain	UNSPECIFIED	UNSPECIFIED
Narita, N.	Astrobiology Center and National Astronomical Observatory of Japan, NINS, 2-21-1 Osawa, Mitaka, Tokyo, 181-8588, Japan; Department of Earth and Planetary Sciences, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8551, Japan; Institut	UNSPECIFIED	UNSPECIFIED
Nespral, D.	Instituto de Astrofisica de Canarias (IAC), 38205, La Laguna, Tenerife, Spain; Departamento de Astrofisica, Universidad de La Laguna (ULL), 38206, La Laguna, Tenerife, Spain	UNSPECIFIED	UNSPECIFIED
Niraula, P.	Department of Earth, Atmospheric and Planetary Sciences, MIT, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA	UNSPECIFIED	UNSPECIFIED
Patzold, M.	Rheinisches Institut fur Umweltforschung an der Universitat zu Koln, Aachener Strasse 209, 50931, Koln, Germany	UNSPECIFIED	UNSPECIFIED
Persson, C. M.	Department of Space, Earth and Environment, Chalmers University of Technology, Onsala Space Observatory, 439 92, Onsala, Sweden	UNSPECIFIED	UNSPECIFIED
Prieto-Arranz, J.	Instituto de Astrofisica de Canarias (IAC), 38205, La Laguna, Tenerife, Spain; Departamento de Astrofisica, Universidad de La Laguna (ULL), 38206, La Laguna, Tenerife, Spain	UNSPECIFIED	UNSPECIFIED
Quirrenbach, A.	Landessternwarte, Zentrum fur Astronomie der Universtat Heidelberg, Konigstuhl 12, 69117, Heidelberg, Germany	UNSPECIFIED	UNSPECIFIED
Rauer, H	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Redfield, S.	Astronomy Department and Van Vleck Observatory, Wesleyan University, Middletown, CT, 06459, USA	UNSPECIFIED	UNSPECIFIED
Reiners, A.	Institut fur Astrophysik, Georg-August-Universitat, Friedrich-Hund-Platz 1, 37077, Gottingen, Germany	UNSPECIFIED	UNSPECIFIED
Ribas, I.	Institut de Ciencies de l'Espai (ICE, CSIC), C/Can Magrans, s/n, Campus UAB, 08193, Bellaterra, Spain; Institut d'Estudis Espacials de Catalunya (IEEC), 08034, Barcelona, Spain	UNSPECIFIED	UNSPECIFIED
Smith, Alexis	UNSPECIFIED	https://orcid.org/0000-0002-2386-4341	UNSPECIFIED

Date:

2019

Journal or Publication Title:

Astronomy & Astrophysics

Refereed publication:

Yes

Open Access:

Yes

Gold Open Access:

In SCOPUS:

Yes

In ISI Web of Science:

Yes

Volume:

623

DOI:

10.1051/0004-6361/201834952

Page Range:

A114

Publisher:

EDP Sciences

ISSN:

0004-6361

Status:

Published

Keywords:

planetary systems, techniques: photometric, techniques: radial velocities, techniques: high angular resolution, stars: individual: HD 119130, stars: individual: K2-292

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 09:31

Last Modified:

28 Mar 2023 23:53

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