44 Validated Planets from K2 Campaign 10

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    John H. Livingston, Univ Tokyo, University of Tokyo, Grad Sch Sci, Dept Astron, Bunkyo Ku, Michael Endl, Univ Texas Austin, University of Texas System, University of Texas Austin, McDonald Observ, Fei Dai, Princeton Univ, Princeton University, Dept Astrophys Sci, William D. Cochran, Univ Texas Austin, University of Texas System, University of Texas Austin, McDonald Observ, Oscar Barragan, Univ Torino, University of Turin, Dipartimento Fis, Davide Gandolfi, Univ Torino, University of Turin, Dipartimento Fis, Teruyuki Hirano, Tokyo Inst Technol, Tokyo Institute of Technology, Dept Earth & Planetary Sci, Meguro Ku, Sascha Grziwa, Univ Cologne, University of Cologne, Rheinisches Inst Umweltforsch, Alexis M. S. Smith, German Aerosp Ctr, German Aerospace Centre (DLR), Helmholtz Association, Inst Planetary Res,
  • Simon Albrecht
  • Juan Cabrera, German Aerosp Ctr, German Aerospace Centre (DLR), Helmholtz Association, Inst Planetary Res, Szilard Csizmadia, German Aerosp Ctr, German Aerospace Centre (DLR), Helmholtz Association, Inst Planetary Res, Jerome P. de Leon, Univ Tokyo, University of Tokyo, Grad Sch Sci, Dept Astron, Bunkyo Ku, Hans Deeg, Univ La Laguna, Universidad de la Laguna, Dept Astrofis, Philipp Eigmueller, German Aerosp Ctr, German Aerospace Centre (DLR), Helmholtz Association, Inst Planetary Res, Anders Erikson, German Aerosp Ctr, German Aerospace Centre (DLR), Helmholtz Association, Inst Planetary Res, Mark Everett, Natl Opt Astron Observ, National Optical Astronomy Observatory, Malcolm Fridlund, Chalmers Univ Technol, Chalmers University of Technology, Onsala Space Observ, Dept Space Earth & Environm, Akihiko Fukui, Instituto de Astrofísica de Canarias, Eike W. Guenther, Thüringer Landessternwarte Tautenburg, Artie P. Hatzes, Thüringer Landessternwarte Tautenburg, Steve Howell, NASA, Ames Research Center, National Aeronautics & Space Administration (NASA), Ames Res Ctr, Space Sci & Astrobiol Div, Judith Korth, Univ Cologne, University of Cologne, Rheinisches Inst Umweltforsch, Norio Narita, Natl Astron Observ Japan, National Astronomical Observatory of Japan, National Institutes of Natural Sciences (NINS) - Japan, Okayama Astrophys Observ, David Nespral, Univ La Laguna, Universidad de la Laguna, Dept Astrofis, Grzegorz Nowak, Univ La Laguna, Universidad de la Laguna, Dept Astrofis, Enric Palle, Univ La Laguna, Universidad de la Laguna, Dept Astrofis, Martin Paetzold, Univ Cologne, University of Cologne, Rheinisches Inst Umweltforsch, Carina M. Persson, Chalmers Univ Technol, Chalmers University of Technology, Onsala Space Observ, Dept Space Earth & Environm, Jorge Prieto-Arranz, Univ La Laguna, Universidad de la Laguna, Dept Astrofis, Heike Rauer, TU Berlin, Technical University of Berlin, Ctr Astron & Astrophys, Motohide Tamura, Natl Astron Observ Japan, National Astronomical Observatory of Japan, National Institutes of Natural Sciences (NINS) - Japan, Okayama Astrophys Observ, Vincent Van Eylen, Leiden Univ, Leiden University, Leiden Observ, Joshua N. Winn, Princeton Univ, Princeton University, Dept Astrophys Sci

We present 44 validated planets from the 10th observing campaign of the NASA K2 mission, as well as highresolution spectroscopy and speckle imaging follow-up observations. These 44 planets come from an initial set of 72 vetted candidates, which we subjected to a validation process incorporating pixel-level analyses, light curve analyses, observational constraints, and statistical false positive probabilities. Our validated planet sample has median values of R-p = 2.2 R-&, P-orb = 6.9 days, T-eq = 890 K, and J = 11.2 mag. Of particular interest are four ultrashort period planets (P-orb less than or similar to 1 day), 16 planets smaller than 2 R-&, and two planets with large predicted amplitude atmospheric transmission features orbiting infrared-bright stars. We also present 27 planet candidates, most of which are likely to be real and worthy of further observations. Our validated planet sample includes 24 new discoveries and has enhanced the number of currently known super-Earths (R-p approximate to 1-2R(&)), sub-Neptunes (R-p approximate to 2-4R(&)), and subSaturns (R-p approximate to 4-8R(&)) orbiting bright stars (J = 8-10 mag) by similar to 4%, similar to 17%, and similar to 11%, respectively.

Original languageEnglish
JournalAstronomical Journal
Volume156
Issue number2
Number of pages22
ISSN0004-6256
DOIs
StatePublished - Aug 2018

    Research areas

  • planetary systems, planets and satellites: detection, techniques: photometric, techniques: spectoscopic, LOW-MASS STARS, SUPER-EARTHS, M-DWARF, SIZED EXOPLANET, BINARY STARS, SPACED DATA, TELESCOPE, TIME, KEPLER-138, CANDIDATES

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