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44 Validated Planets from K2 Campaign 10

Status Report From: arXiv.org e-Print archive
Posted: Thursday, July 5, 2018

John H. Livingston, Michael Endl, Fei Dai, William D. Cochran, Oscar Barragan, Davide Gandolfi, Teruyuki Hirano, Sascha Grziwa, Alexis M. S. Smith, Simon Albrecht, Juan Cabrera, Szilard Csizmadia, Jerome P. de Leon, Hans Deeg, Philipp Eigmueller, Anders Erikson, Mark Everett, Malcolm Fridlund, Akihiko Fukui, Eike W. Guenther, Artie P. Hatzes, Steve Howell, Judith Korth, Norio Narita, David Nespral, Grzegorz Nowak, Enric Palle, Martin Paetzold, Carina M. Persson, Jorge Prieto-Arranz, Heike Rauer, Motohide Tamura, Vincent Van Eylen, Joshua N. Winn
(Submitted on 29 Jun 2018)

We present 44 validated planets from the 10th observing campaign of the NASA K2 mission, as well as high resolution 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 Rp = 2.2 R⊕, Porb = 6.9 days, Teq = 890 K, and J = 11.2 mag. Of particular interest are four ultra-short period planets (Porb≲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 (Rp≈1−2R⊕), sub-Neptunes (Rp≈2−4R⊕), and sub-Saturns (Rp≈4−8R⊕) orbiting bright stars (J=8−10 mag) by ∼4%, ∼17%, and ∼11%, respectively.

Comments:    25 pages, 6 figures, 12 tables, accepted for publication in AJ
Subjects:    Earth and Planetary Astrophysics (astro-ph.EP)
Cite as:    arXiv:1806.11504 [astro-ph.EP] (or arXiv:1806.11504v1 [astro-ph.EP] for this version)
Submission history
From: John Livingston
[v1] Fri, 29 Jun 2018 16:03:00 GMT (1266kb,D)
http://xxx.lanl.gov/abs/1806.11504

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