Barragan, Oscar ORCID: 0000-0003-0563-0493, Grziwa, Sascha, Gandolfi, Davide ORCID: 0000-0001-8627-9628, Fridlund, Malcolm, Endl, Michael, Deeg, Hans J., Cagigal, Manuel P., Lanza, Antonino F., Moroni, Pier G. Prada, Smith, Alexis M. S., Korth, Judith ORCID: 0000-0002-0076-6239, Bedell, Megan, Cabrera, Juan ORCID: 0000-0001-6653-5487, Cochran, William D., Cusano, Felice, Csizmadia, Szilard, Eigmueller, Philipp, Erikson, Anders, Guenther, Eike W., Hatzes, Artie P., Nespral, David, Paetzold, Martin, Prieto-Arranz, Jorge and Rauer, Heike (2016). K2-98b: A 32 M-circle plus NEPTUNE-SIZE PLANET IN A 10 DAY ORBIT TRANSITING AN F8 STAR. Astron. J., 152 (6). BRISTOL: IOP PUBLISHING LTD. ISSN 1538-3881

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Abstract

We report the discovery of K2-98b (EPIC 211391664b), a transiting Neptune-size planet monitored by the K2 mission during its Campaign 5. We combine the K2 time-series data with ground-based photometric and spectroscopic follow-up observations to confirm the planetary nature of the object and derive its mass, radius, and orbital parameters. K2-98b is a warm Neptune-like planet in a 10 day orbit around a V = 12.2 mag F-type star with M-star = 1.074 +/- 0.042 M-circle dot, R-star = 1.311(-0.048)(+0.083) R-circle dot, and age of 5.2(-1.0)(+1.2) Gyr We derive a planetary mass and radius of M-p = 32.2 +/- 8.1 M-circle plus and R-p = 4.3(-0.2)(+0.3) R-circle plus.K2-98b joins the relatively small group of Neptune-size planets whose mass and radius have been derived with a precision better than 25%. We estimate that the planet will be engulfed by its host star in similar to 3 Gyr, due to the evolution of the latter toward the red giant branch.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Barragan, OscarUNSPECIFIEDorcid.org/0000-0003-0563-0493UNSPECIFIED
Grziwa, SaschaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gandolfi, DavideUNSPECIFIEDorcid.org/0000-0001-8627-9628UNSPECIFIED
Fridlund, MalcolmUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Endl, MichaelUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Deeg, Hans J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cagigal, Manuel P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lanza, Antonino F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Moroni, Pier G. PradaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Smith, Alexis M. S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Korth, JudithUNSPECIFIEDorcid.org/0000-0002-0076-6239UNSPECIFIED
Bedell, MeganUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cabrera, JuanUNSPECIFIEDorcid.org/0000-0001-6653-5487UNSPECIFIED
Cochran, William D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cusano, FeliceUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Csizmadia, SzilardUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Eigmueller, PhilippUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Erikson, AndersUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Guenther, Eike W.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hatzes, Artie P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Nespral, DavidUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Paetzold, MartinUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Prieto-Arranz, JorgeUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Rauer, HeikeUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-253314
DOI: 10.3847/0004-6256/152/6/193
Journal or Publication Title: Astron. J.
Volume: 152
Number: 6
Date: 2016
Publisher: IOP PUBLISHING LTD
Place of Publication: BRISTOL
ISSN: 1538-3881
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
SOLAR-TYPE STARS; EXOPLANETARY SYSTEMS; HOT JUPITERS; LIGHT CURVES; SUPER-EARTHS; MISSION; MASS; KEPLER; CANDIDATES; SPECTROGRAPHMultiple languages
Astronomy & AstrophysicsMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/25331

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