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Anders Bo Justesen

K2-141 b A 5-M-circle plus super-Earth transiting a K7V star every 6.7 h

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisTidsskriftartikelForskningpeer review

DOI

  • O. Barragan, Univ Torino, University of Turin, Dipartimento Fis
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  • D. Gandolfi, Univ Torino, University of Turin, Dipartimento Fis
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  • F. Dai, Princeton Univ, Princeton University, Dept Astrophys Sci
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  • J. Livingston, Univ Tokyo, University of Tokyo, Grad Sch Sci, Dept Astron, Bunkyo Ku
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  • C. M. Persson, Chalmers Univ Technol, Onsala Space Observ, Dept Space Earth & Environm
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  • T. Hirano, Tokyo Inst Technol, Tokyo Institute of Technology, Dept Earth & Planetary Sci, Meguro Ku
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  • N. Narita, Natl Astron Observ Japan, National Astronomical Observatory of Japan, National Institutes of Natural Sciences (NINS) - Japan, Okayama Astrophys Observ
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  • Sz. Csizmadia, German Aerosp Ctr, Inst Planetary Res
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  • J. N. Winn, Princeton Univ, Princeton University, Dept Astrophys Sci
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  • D. Nespral, Instituto de Astrofísica de Canarias
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  • J. Prieto-Arranz, Instituto de Astrofísica de Canarias
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  • A. M. S. Smith, German Aerosp Ctr, Inst Planetary Res
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  • G. Nowak, Instituto de Astrofísica de Canarias
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  • S. Albrecht
  • G. Antoniciello, Univ Torino, University of Turin, Dipartimento Fis
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  • A. Bo Justesen
  • J. Cabrera, German Aerosp Ctr, Inst Planetary Res
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  • W. D. Cochran, Univ Texas Austin, University of Texas Austin, McDonald Observ
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  • H. Deeg, Instituto de Astrofísica de Canarias
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  • Ph. Eigmuller, German Aerosp Ctr, Inst Planetary Res
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  • M. Endl, Univ Texas Austin, University of Texas Austin, McDonald Observ
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  • A. Erikson, German Aerosp Ctr, Inst Planetary Res
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  • M. Fridlund, Leiden Univ, Leiden University, Leiden Observ
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  • A. Fukui, Natl Astron Observ Japan, National Astronomical Observatory of Japan, National Institutes of Natural Sciences (NINS) - Japan, Okayama Astrophys Observ
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  • S. Grziwa, Univ Cologne, University of Cologne, Rhein Inst Umweltforsch, Abt Planetenforsch
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  • E. Guenther, Thuringer Landessternwarte Tautenburg TLS
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  • A. P. Hatzes, Thuringer Landessternwarte Tautenburg TLS
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  • D. Hidalgo, Instituto de Astrofísica de Canarias
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  • M. C. Johnson, Ohio State Univ, Ohio State University, Dept Astron, McPherson Lab
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  • J. Korth, Univ Cologne, University of Cologne, Rhein Inst Umweltforsch, Abt Planetenforsch
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  • E. Palle, Instituto de Astrofísica de Canarias
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  • M. Patzold, Univ Cologne, University of Cologne, Rhein Inst Umweltforsch, Abt Planetenforsch
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  • H. Rauer, TU Berlin, Technical University of Berlin, Ctr Astron & Astrophys
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  • Y. Tanaka, Univ Tokyo, University of Tokyo, Grad Sch Sci, Dept Astron, Bunkyo Ku
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  • V. Van Eylen, Leiden Univ, Leiden University, Leiden Observ

We report on the discovery of K2-141 b (EPIC 246393474 b), an ultra-short-period super-Earth on a 6.7 h orbit transiting an active K7V star based on data from K2 campaign 12. We confirmed the planet's existence and measured its mass with a series of follow-up observations: seeing-limited MuSCAT imaging, NESSI high-resolution speckle observations, and FIES and HARPS high-precision radial-velocity monitoring. K2-141 b has a mass of 5.31 +/- 0.46 M-circle plus and radius of 1.54(-0.09)(+0.10), yielding a mean density of 8.00(-1.45)(+1.83) g cm(-3) and suggesting a rocky-iron composition. Models indicate that iron cannot exceed similar to 70% of the total mass. With an orbital period of only 6.7 h, K2-141 b is the shortest-period planet known to date with a precisely determined mass.

OriginalsprogEngelsk
Artikelnummer95
TidsskriftAstronomy & Astrophysics
Vol/bind612
Antal sider11
ISSN1432-0746
DOI
StatusUdgivet - 4 maj 2018

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