elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

K2-264: a transiting multiplanet system in the Praesepe open cluster

Livingston, John H and Dai, Fei and Hirano, Teruyuki and Gandolfi, Davide and Trani, Alessandro A and Nowak, Grzegorz and Cochran, William D and Endl, Michael and Albrecht, Simon and Barragan, Oscar and Cabrera Perez, Juan and Csizmadia, Szilard and de Leon, Jerome P and Deeg, Hans and Eigmüller, Philipp and Erikson, Anders and Fridlund, Malcolm and Fukui, Akihiko and Grziwa, Sascha and Guenther, Eike W and Hatzes, Artie P. and Korth, Judith and Kuzuhara, Masayuki and Montañes, Pilar and Narita, Norio and Nespral, David and Palle, Enric and Paetzold, Martin and Persson, Carina M. and Prieto-Arranz, Jorge and Rauer, Heike and Tamura, Motohide and Van Eylen, Vincent and Winn, Joshua N. (2019) K2-264: a transiting multiplanet system in the Praesepe open cluster. Monthly Notices of the Royal Astronomical Society, 484 (1), pp. 8-18. Oxford University Press. ISSN 0035-8711

[img] PDF - Published version
3MB

Official URL: http://dx.doi.org/10.1093/mnras/sty3464

Abstract

Planet host stars with well-constrained ages provide a rare window to the time domain of planet formation and evolution. The NASA K2 mission has enabled the discovery of the vast majority of known planets transiting stars in clusters, providing a valuable sample of planets with known ages and radii. We present the discovery of two planets transiting K2-264, an M2 dwarf in the intermediate age (600-800 Myr) Praesepe open cluster (also known as the Beehive Cluster, M44, or NGC 2632), which was observed by K2 during Campaign 16. The planets have orbital periods of 5.8 and 19.7 d, and radii of 2.2 ± 0.2 and 2.7 ± 0.2R⊕, respectively, and their equilibrium temperatures are 496 ± 10 and 331 ± 7 K, making this a system of two warm sub-Neptunes. When placed in the context of known planets orbiting field stars of similar mass to K2-264, these planets do not appear to have significantly inflated radii, as has previously been noted for some cluster planets. As the second known system of multiple planets transiting a star in a cluster, K2-264 should be valuable for testing theories of photoevaporation in systems of multiple planets. Follow-up observations with current near-infrared (NIR) spectrographs could yield planet mass measurements, which would provide information about the mean densities and compositions of small planets soon after photoevaporation is expected to have finished. Follow-up NIR transit observations using Spitzer or large ground-based telescopes could yield improved radius estimates, further enhancing the characterization of these interesting planets.

Item URL in elib:https://elib.dlr.de/127761/
Document Type:Article
Title:K2-264: a transiting multiplanet system in the Praesepe open cluster
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Livingston, John HDepartment of Astronomy, University of Tokyo, 7-3-1 Hongo, Bunkyo-ky, Tokyo 113-0033, JapanUNSPECIFIED
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
Hirano, TeruyukiDepartment of Earth and Planetary Sciences, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8551, Japan);UNSPECIFIED
Gandolfi, DavideDipartimento di Fisica, Universit`UNSPECIFIED
Trani, Alessandro ADepartment of Astronomy, University of Tokyo, 7-3-1 Hongo, Bunkyo-ky, Tokyo 113-0033, JapanUNSPECIFIED
Nowak, GrzegorzInstituto de Astrofísica de Canarias, C/ Vía Láctea s/n, E-38205 La Laguna, SpainUNSPECIFIED
Cochran, William DDepartment of Astronomy and McDonald Observatory, University of Texas at Austin, 2515 Speedway, Stop C1400, Austin, TX 78712, USAUNSPECIFIED
Endl, MichaelDepartment of Astronomy and McDonald Observatory, University of Texas at Austin, 2515 Speedway, Stop C1400, Austin, TX 78712, USAUNSPECIFIED
Albrecht, SimonStellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, DenmarkUNSPECIFIED
Barragan, OscarDipartimento di Fisica, Universita di Torino, via P. Giuria 1, I-10125 Torino, Italy 7 Instituto de AstrofisicaUNSPECIFIED
Cabrera Perez, JuanJuan.Cabrera (at) dlr.deUNSPECIFIED
Csizmadia, Szilardszilard.csizmadia (at) dlr.deUNSPECIFIED
de Leon, Jerome PDepartment of Astronomy, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, JapanUNSPECIFIED
Deeg, HansInstituto de Astrofísica de Canarias, C/ Vía Láctea s/n, E-38205 La Laguna, SpainUNSPECIFIED
Eigmüller, PhilippPhilipp.Eigmueller (at) dlr.dehttps://orcid.org/0000-0003-4096-0594
Erikson, Andersanders.erikson (at) dlr.deUNSPECIFIED
Fridlund, MalcolmResearch and Scientific Support Department, ESA, European Space Research and Technology Centre, Noordwijk, the NetherlandsUNSPECIFIED
Fukui, AkihikoSubaru Telescope Okayama Branch Office, National Astronomical Observatory of Japan, NINS, 3037-5 Honjo, Kamogata, Asakuchi, Okayama 719-0232, Japan ; Instituto de Astrofísica de Canarias, C/ Vía Láctea, s/n, 38205 La Laguna, SpainUNSPECIFIED
Grziwa, SaschaRheinisches Institut für Umweltforschung an der Universität zu Köln, Aachener Strasse 209, D-50931 Köln, GermanyUNSPECIFIED
Guenther, Eike WThüringer Landessternwarte Tautenburg, Sternwarte 5, D-07778 Tautenberg, GermanyUNSPECIFIED
Hatzes, Artie P.Thueringer Landessternwarte TautenburgUNSPECIFIED
Korth, JudithRheinisches Institut für Umweltforschung an der Universität zu Köln, Aachener Strasse 209, D-50931 Köln, GermanyUNSPECIFIED
Kuzuhara, MasayukiAstrobiology Center, NINS, 2-21-1 Osawa, Mitaka, Tokyo 181–8588, JapanUNSPECIFIED
Montañes, PilarInstituto de Astrofísica de Canarias, C/ Vía Láctea s/n, E-38205 La Laguna, SpainUNSPECIFIED
Narita, NorioAstrobiology Center, NINS, 2-21-1 Osawa, Mitaka, Tokyo 181–8588, JapanUNSPECIFIED
Nespral, DavidInstituto de Astrofísica de Canarias, C/ Vía Láctea s/n, E-38205 La Laguna, SpainUNSPECIFIED
Palle, EnricInstituto de Astrofísica de Canarias, C/ Vía Láctea s/n, E-38205 La Laguna, SpainUNSPECIFIED
Paetzold, MartinRheinisches Institut für Umweltforschung an der Universität zu Köln, Aachener Strasse 209, D-50931 Köln, GermanyUNSPECIFIED
Persson, Carina M.Department of Space, Earth and Environmanet, Chalmers University of Technology, Onsala space Observatory, SE-439 92 Onsala SwedenUNSPECIFIED
Prieto-Arranz, JorgeInstituto de Astrofísica de Canarias, C/ Vía Láctea s/n, E-38205 La Laguna, Spain ; Departamento de Astrofísica, Universidad de La Laguna, E-38206 La Laguna, SpUNSPECIFIED
Rauer, Heikeheike.rauer (at) dlr.deUNSPECIFIED
Tamura, MotohideDepartment of Astronomy, 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 181-8588, JUNSPECIFIED
Van Eylen, VincentDepartment of Astrophysical Sciences, Princeton University, 4 Ivy Lane, Princeton, NJ 08544, USAUNSPECIFIED
Winn, Joshua N.Department of Astrophysical Sciences, Princeton University, 4 Ivy Lane, Princeton, NJ 08544, USAUNSPECIFIED
Date:March 2019
Journal or Publication Title:Monthly Notices of the Royal Astronomical Society
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:484
Page Range:pp. 8-18
Publisher:Oxford University Press
ISSN:0035-8711
Status:Published
Keywords:planets and satellites: detection; techniques: photometric; techniques: high angular resolution; Astrophysics - Earth and Planetary Astrophysics
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 - Project PLATO
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Extrasolar Planets and Atmospheres
Institute of Planetary Research > Leitungsbereich PF
Deposited By: Csizmadia, Szilard
Deposited On:13 Jun 2019 10:23
Last Modified:06 Sep 2019 15:17

Repository Staff Only: item control page

Browse
Search
Help & Contact
Information
electronic library is running on EPrints 3.3.12
Copyright © 2008-2017 German Aerospace Center (DLR). All rights reserved.