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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:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
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, SpainUNSPECIFIED
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, SpainUNSPECIFIED
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, SpainUNSPECIFIED
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, USAUNSPECIFIED
Kaminski, A.Landessternwarte, Zentrum fur Astronomie der Universtat Heidelberg, Konigstuhl 12, 69117, Heidelberg, GermanyUNSPECIFIED
Nagel, E.Hamburger Sternwarte, Gojenbergsweg 112, 21029, Hamburg, GermanyUNSPECIFIED
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, SpainUNSPECIFIED
Bauer, F.Instituto de Astrofisica de Andalucia (IAA-CSIC), Glorieta de la Astronomia s/n, 18008, Granada, SpainUNSPECIFIED
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, SpainUNSPECIFIED
Livingston, J.Department of Astronomy, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, JapanUNSPECIFIED
Barragan, O.Dipartimento di Fisica, Universita di Torino, Via P. Giuria 1, 10125, Torino, ItalyUNSPECIFIED
Hirano, T.Department of Earth and Planetary Sciences, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8551, JapanUNSPECIFIED
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 NetherlandsUNSPECIFIED
Gandolfi, D.Department of Earth and Planetary Sciences, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8551, JapanUNSPECIFIED
Justesen, A. B.Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, 8000, Aarhus C, DenmarkUNSPECIFIED
Hjorth, M.Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, 8000, Aarhus C, DenmarkUNSPECIFIED
Van Eylen, V.Department of Astrophysical Sciences, Princeton University, 4 Ivy Lane, Princeton, NJ, 08544, USAUNSPECIFIED
Winn, J. N.Department of Astrophysical Sciences, Princeton University, 4 Ivy Lane, Princeton, NJ, 08544, USAUNSPECIFIED
Esposito, M.Thuringer Landessternwarte Tautenburg, Sternwarte 5, 07778, Tautenburg, GermanyUNSPECIFIED
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, SpainUNSPECIFIED
Albrecht, S.Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, 8000, Aarhus C, DenmarkUNSPECIFIED
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, SpainUNSPECIFIED
Amado, P. J.Instituto de Astrofisica de Andalucia (IAA-CSIC), Glorieta de la Astronomia s/n, 18008, Granada, SpainUNSPECIFIED
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, SpainUNSPECIFIED
Caballero, J. A.Centro de Astrobiologia (CSIC-INTA), ESAC campus, Camino Bajo del Castillo s/n, 28692, Villanueva de la Canada, Madrid, SpainUNSPECIFIED
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, Szilardszilard.csizmadia (at) dlr.deUNSPECIFIED
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, 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
Fukui, A.Okayama Astrophysical Observatory, National Astronomical Observatory of Japan, NINS, Asakuchi, Okayama, 719-0232, JapanUNSPECIFIED
Grziwa, S.Rheinisches Institut fur Umweltforschung an der Universitat zu Koln, Aachener Strasse 209, 50931, Koln, GermanyUNSPECIFIED
Guenther, E. W.Thuringer Landessternwarte Tautenburg, Sternwarte 5, 07778, Tautenburg, GermanyUNSPECIFIED
Hatzes, A. P.Thuringer Landessternwarte Tautenburg, Sternwarte 5, 07778, Tautenburg, GermanyUNSPECIFIED
Knudstrup, E.Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, 8000, Aarhus C, DenmarkUNSPECIFIED
Korth, J.Rheinisches Institut fur Umweltforschung an der Universitat zu Koln, Aachener Strasse 209, 50931, Koln, GermanyUNSPECIFIED
Lam, K. W. F.Zentrum fur Astronomie und Astrophysik, Technische Universitat Berlin, Hardenbergstr. 36, 10623, Berlin, GermanyUNSPECIFIED
Lund, M. N.Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, 8000, Aarhus C, DenmarkUNSPECIFIED
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, SpainUNSPECIFIED
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, SpainUNSPECIFIED
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; InstitutUNSPECIFIED
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, SpainUNSPECIFIED
Niraula, P.Department of Earth, Atmospheric and Planetary Sciences, MIT, 77 Massachusetts Avenue, Cambridge, MA, 02139, USAUNSPECIFIED
Patzold, M.Rheinisches Institut fur Umweltforschung an der Universitat zu Koln, Aachener Strasse 209, 50931, Koln, GermanyUNSPECIFIED
Persson, C. M.Department of Space, Earth and Environment, Chalmers University of Technology, Onsala Space Observatory, 439 92, Onsala, SwedenUNSPECIFIED
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, SpainUNSPECIFIED
Quirrenbach, A.Landessternwarte, Zentrum fur Astronomie der Universtat Heidelberg, Konigstuhl 12, 69117, Heidelberg, GermanyUNSPECIFIED
Rauer, Hheiker.rauer (at) dlr.deUNSPECIFIED
Redfield, S.Astronomy Department and Van Vleck Observatory, Wesleyan University, Middletown, CT, 06459, USAUNSPECIFIED
Reiners, A.Institut fur Astrophysik, Georg-August-Universitat, Friedrich-Hund-Platz 1, 37077, Gottingen, GermanyUNSPECIFIED
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, SpainUNSPECIFIED
Smith, AlexisAlexis.Smith (at) dlr.deUNSPECIFIED
Date:2019
Journal or Publication Title:Astronomy & Astrophysics
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
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 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 09:31
Last Modified:31 Jul 2019 20:25

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