Universität zu Köln

Niraula, Prajwal ORCID: 0000-0002-8052-3893, Redfield, Seth, Dai, Fei, Barragan, Oscar ORCID: 0000-0003-0563-0493, Gandolfi, Davide ORCID: 0000-0001-8627-9628, Cauley, P. Wilson, Hirano, Teruyuki, Korth, Judith ORCID: 0000-0002-0076-6239, Smith, Alexis M. S., Prieto-Arranz, Jorge, Grziwa, Sascha, Fridlund, Malcolm ORCID: 0000-0002-0855-8426, Persson, Carina M., Justesen, Anders Bo ORCID: 0000-0002-0174-2466, Winn, Joshua N., Albrecht, Simon, Cochran, William D., Csizmadia, Szilard, Duvvuri, Girish M., Endl, Michael, Hatzes, Artie P., Livingston, John H., Narita, Norio, Nespral, David, Nowak, Grzegorz, Paetzold, Martin, Palle, Enric and Van Eylen, Vincent ORCID: 0000-0001-5542-8870 (2017). Three Super-Earths Transiting the Nearby Star GJ 9827. Astron. J., 154 (6). BRISTOL: IOP PUBLISHING LTD. ISSN 1538-3881

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Abstract

We report on the discovery of three transiting planets around GJ. 9827. The planets have radii of 1.75 +/- 0.18, 1.36 +/- 0.14, and 2.11 (+0.22)(-0.21) R-circle plus, and periods of 1.20896, 3.6480, and 6.2014 days, respectively. The detection was made in Campaign 12 observations as part of our K2 survey of nearby stars. GJ 9827 is a V = 10.39 mag K6V star at a distance of 30.3 +/- 1.6 parsecs and the nearest star to be found hosting planets by Kepler and K2. The radial velocity follow- up, high- resolution imaging, and detection of multiple transiting objects near commensurability drastically reduce the false positive probability. The orbital periods of GJ 9827 b, c, and d planets are very close to the 1:3:5 mean motion resonance. Our preliminary analysis shows that GJ 9827 planets are excellent candidates for atmospheric observations. Besides, the planetary radii span both sides of the rocky and gaseous divide, hence the system will be an asset in expanding our understanding of the threshold.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Niraula, Prajwal UNSPECIFIED orcid.org/0000-0002-8052-3893 UNSPECIFIED Redfield, Seth UNSPECIFIED UNSPECIFIED UNSPECIFIED Dai, Fei UNSPECIFIED UNSPECIFIED UNSPECIFIED Barragan, Oscar UNSPECIFIED orcid.org/0000-0003-0563-0493 UNSPECIFIED Gandolfi, Davide UNSPECIFIED orcid.org/0000-0001-8627-9628 UNSPECIFIED Cauley, P. Wilson UNSPECIFIED UNSPECIFIED UNSPECIFIED Hirano, Teruyuki UNSPECIFIED UNSPECIFIED UNSPECIFIED Korth, Judith UNSPECIFIED orcid.org/0000-0002-0076-6239 UNSPECIFIED Smith, Alexis M. S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Prieto-Arranz, Jorge UNSPECIFIED UNSPECIFIED UNSPECIFIED Grziwa, Sascha UNSPECIFIED UNSPECIFIED UNSPECIFIED Fridlund, Malcolm UNSPECIFIED orcid.org/0000-0002-0855-8426 UNSPECIFIED Persson, Carina M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Justesen, Anders Bo UNSPECIFIED orcid.org/0000-0002-0174-2466 UNSPECIFIED Winn, Joshua N. UNSPECIFIED UNSPECIFIED UNSPECIFIED Albrecht, Simon UNSPECIFIED UNSPECIFIED UNSPECIFIED Cochran, William D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Csizmadia, Szilard UNSPECIFIED UNSPECIFIED UNSPECIFIED Duvvuri, Girish M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Endl, Michael UNSPECIFIED UNSPECIFIED UNSPECIFIED Hatzes, Artie P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Livingston, John H. UNSPECIFIED UNSPECIFIED UNSPECIFIED Narita, Norio UNSPECIFIED UNSPECIFIED UNSPECIFIED Nespral, David UNSPECIFIED UNSPECIFIED UNSPECIFIED Nowak, Grzegorz UNSPECIFIED UNSPECIFIED UNSPECIFIED Paetzold, Martin UNSPECIFIED UNSPECIFIED UNSPECIFIED Palle, Enric UNSPECIFIED UNSPECIFIED UNSPECIFIED Van Eylen, Vincent UNSPECIFIED orcid.org/0000-0001-5542-8870 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-210019
DOI:	10.3847/1538-3881/aa957c
Journal or Publication Title:	Astron. J.
Volume:	154
Number:	6
Date:	2017
Publisher:	IOP PUBLISHING LTD
Place of Publication:	BRISTOL
ISSN:	1538-3881
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Externe Einrichtungen > An-Institute > Associated Institutes of the Faculty of Mathematics and Natural Sciences > Rhenish Institute for Environmental Research - RIU
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language WEBB-SPACE-TELESCOPE; 2ND-ORDER RESONANCES; PLANETS; MISSION; DWARF; ATMOSPHERES; ABSORPTION; SPECTRUM; SYSTEMS; KEPLER Multiple languages Astronomy & Astrophysics Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/21001