Planet Candidates from K2 Campaigns 5-8 and Follow-up Optical Spectroscopy

被引：43

作者：

Petigura, Erik A. ^{[1
,9
]}

Crossfield, Ian J. M. ^{[2
,3
]}

Isaacson, Howard ^{[4
]}

Beichman, Charles A. ^{[5
]}

Christiansen, Jessie L. ^{[5
]}

Dressing, Courtney D. ^{[1
,4
]}

Fulton, Benjamin J. ^{[1
,6
]}

Howard, Andrew W. ^{[1
]}

Kosiarek, Molly R.

Lepine, Sebastien ^{[7
]}

Schlieder, Joshua E. ^{[8
]}

Sinukoff, Evan ^{[1
,6
]}

Yee, Samuel W. ^{[1
]}

机构：

[1] CALTECH, 1200 E Calif Blvd, Pasadena, CA 91125 USA

[2] MIT, Dept Phys, 77 Massachusetts Ave, Cambridge, MA USA

[3] Univ Calif Santa Cruz, Santa Cruz, CA 95064 USA

[4] Univ Calif Berkeley, Dept Astron, 501 Campbell Hall 3411, Berkeley, CA 94720 USA

[5] CALTECH, NASA, Exoplanet Sci Inst, Pasadena, CA 91125 USA

[6] CALTECH, NASA, Infrared Proc & Anal Ctr, Pasadena, CA 91125 USA

[7] Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA

[8] Georgia State Univ, Dept Phys & Astron, 25 Pk Pl NE 605, Atlanta, GA USA

[9] NASA, Goddard Space Flight Ctr, 8800 Greenbelt Rd, Greenbelt, MD 20771 USA

来源：

ASTRONOMICAL JOURNAL | 2018年 / 155卷 / 01期

关键词：

planetary systems; planets and satellites: detection; planets and satellites: fundamental parameters; stars: abundances; stars: fundamental parameters; techniques: spectroscopic; STELLAR; PHOTOMETRY; EVOLUTION; SYSTEMS; MASS;

D O I：

10.3847/1538-3881/aa9b83

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present 151 planet candidates orbiting 141 stars from K2 campaigns 5-8 (C5-C8), identified through a systematic search of K2 photometry. In addition, we identify 16 targets as likely eclipsing binaries, based on their light curve morphology. We obtained follow-up optical spectra of 105/141 candidate host stars and 8/16 eclipsing binaries to improve stellar properties and to identify spectroscopic binaries. Importantly, spectroscopy enables measurements of host star radii with approximate to 10% precision, compared to approximate to 40% precision when only broadband photometry is available. The improved stellar radii enable improved planet radii. Our curated catalog of planet candidates provides a starting point for future efforts to confirm and characterize K2 discoveries.

引用

页数：14

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