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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.
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Official URL: http://dx.doi.org/10.1093/mnras/sty3464 AbstractPlanet 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/ |
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Document Type: | Article |
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Title: | K2-264: a transiting multiplanet system in the Praesepe open cluster |
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Authors: | Authors | Institution or Email of Authors | Author's ORCID iD |
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Livingston, John H | Department of Astronomy, University of Tokyo, 7-3-1 Hongo, Bunkyo-ky, Tokyo 113-0033, Japan | 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 | Hirano, Teruyuki | Department of Earth and Planetary Sciences, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8551, Japan); | UNSPECIFIED | Gandolfi, Davide | Dipartimento di Fisica, Universit` | UNSPECIFIED | Trani, Alessandro A | Department of Astronomy, University of Tokyo, 7-3-1 Hongo, Bunkyo-ky, Tokyo 113-0033, Japan | UNSPECIFIED | Nowak, Grzegorz | Instituto de Astrofísica de Canarias, C/ Vía Láctea s/n, E-38205 La Laguna, Spain | UNSPECIFIED | Cochran, William D | Department of Astronomy and McDonald Observatory, University of Texas at Austin, 2515 Speedway, Stop C1400, Austin, TX 78712, USA | UNSPECIFIED | Endl, Michael | Department of Astronomy and McDonald Observatory, University of Texas at Austin, 2515 Speedway, Stop C1400, Austin, TX 78712, USA | UNSPECIFIED | Albrecht, Simon | Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, Denmark | UNSPECIFIED | Barragan, Oscar | Dipartimento di Fisica, Universita di Torino, via P. Giuria 1, I-10125 Torino, Italy 7 Instituto de Astrofisica | UNSPECIFIED | Cabrera Perez, Juan | Juan.Cabrera (at) dlr.de | UNSPECIFIED | Csizmadia, Szilard | szilard.csizmadia (at) dlr.de | UNSPECIFIED | de Leon, Jerome P | Department of Astronomy, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan | UNSPECIFIED | Deeg, Hans | Instituto de Astrofísica de Canarias, C/ Vía Láctea s/n, E-38205 La Laguna, Spain | UNSPECIFIED | Eigmüller, Philipp | Philipp.Eigmueller (at) dlr.de | https://orcid.org/0000-0003-4096-0594 | Erikson, Anders | anders.erikson (at) dlr.de | UNSPECIFIED | Fridlund, Malcolm | Research and Scientific Support Department, ESA, European Space Research and Technology Centre, Noordwijk, the Netherlands | UNSPECIFIED | Fukui, Akihiko | Subaru 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, Spain | UNSPECIFIED | Grziwa, Sascha | Rheinisches Institut für Umweltforschung an der Universität zu Köln, Aachener Strasse 209, D-50931 Köln, Germany | UNSPECIFIED | Guenther, Eike W | Thüringer Landessternwarte Tautenburg, Sternwarte 5, D-07778 Tautenberg, Germany | UNSPECIFIED | Hatzes, Artie P. | Thueringer Landessternwarte Tautenburg | UNSPECIFIED | Korth, Judith | Rheinisches Institut für Umweltforschung an der Universität zu Köln, Aachener Strasse 209, D-50931 Köln, Germany | UNSPECIFIED | Kuzuhara, Masayuki | Astrobiology Center, NINS, 2-21-1 Osawa, Mitaka, Tokyo 181–8588, Japan | UNSPECIFIED | Montañes, Pilar | Instituto de Astrofísica de Canarias, C/ Vía Láctea s/n, E-38205 La Laguna, Spain | UNSPECIFIED | Narita, Norio | Astrobiology Center, NINS, 2-21-1 Osawa, Mitaka, Tokyo 181–8588, Japan | UNSPECIFIED | Nespral, David | Instituto de Astrofísica de Canarias, C/ Vía Láctea s/n, E-38205 La Laguna, Spain | UNSPECIFIED | Palle, Enric | Instituto de Astrofísica de Canarias, C/ Vía Láctea s/n, E-38205 La Laguna, Spain | UNSPECIFIED | Paetzold, Martin | Rheinisches Institut für Umweltforschung an der Universität zu Köln, Aachener Strasse 209, D-50931 Köln, Germany | UNSPECIFIED | Persson, Carina M. | Department of Space, Earth and Environmanet, Chalmers University of Technology, Onsala space Observatory, SE-439 92 Onsala Sweden | UNSPECIFIED | Prieto-Arranz, Jorge | Instituto 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, Sp | UNSPECIFIED | Rauer, Heike | heike.rauer (at) dlr.de | UNSPECIFIED | Tamura, Motohide | Department 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, J | UNSPECIFIED | Van Eylen, Vincent | Department of Astrophysical Sciences, Princeton University, 4 Ivy Lane, Princeton, NJ 08544, USA | UNSPECIFIED | Winn, Joshua N. | Department of Astrophysical Sciences, Princeton University, 4 Ivy Lane, Princeton, NJ 08544, USA | UNSPECIFIED |
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Date: | March 2019 |
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Journal or Publication Title: | Monthly Notices of the Royal Astronomical Society |
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Refereed publication: | Yes |
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Open Access: | Yes |
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Gold Open Access: | No |
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In SCOPUS: | Yes |
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In ISI Web of Science: | Yes |
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Volume: | 484 |
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Page Range: | pp. 8-18 |
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Publisher: | Oxford University Press |
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ISSN: | 0035-8711 |
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Status: | Published |
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Keywords: | planets and satellites: detection; techniques: photometric; techniques: high angular resolution; Astrophysics - Earth and Planetary Astrophysics |
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HGF - Research field: | Aeronautics, Space and Transport |
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HGF - Program: | Space |
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HGF - Program Themes: | Space Exploration |
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DLR - Research area: | Raumfahrt |
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DLR - Program: | R EW - Space Exploration |
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DLR - Research theme (Project): | R - Project PLATO (old) |
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Location: |
Berlin-Adlershof
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Institutes and Institutions: | Institute of Planetary Research > Extrasolar Planets and Atmospheres Institute of Planetary Research > Leitungsbereich PF |
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Deposited By: |
Csizmadia, Szilard
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Deposited On: | 13 Jun 2019 10:23 |
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Last Modified: | 06 Sep 2019 15:17 |
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