Universität zu Köln

Smith, A. M. S., Gandolfi, D., Barragan, O., Bowler, B., Csizmadia, Sz., Endl, M., Fridlund, M. C. V., Grziwa, S., Guenther, E., Hatzes, A. P., Nowak, G., Albrecht, S., Alonso, R., Cabrera, J., Cochran, W. D., Deeg, H. J., Cusano, F., Eigmueller, Ph., Erikson, A., Hidalgo, D., Hirano, T., Johnson, M. C., Korth, J., Mann, A., Narita, N., Nespral, D., Palle, E., Paetzold, M., Prieto-Arranz, J., Rauer, H., Ribas, I., Tingley, B. and Wolthoff, V. (2017). K2-99: a subgiant hosting a transiting warm Jupiter in an eccentric orbit and a long-period companion. Mon. Not. Roy. Astron. Soc., 464 (3). S. 2708 - 2717. OXFORD: OXFORD UNIV PRESS. ISSN 1365-2966

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Abstract

We report the discovery from K2 of a transiting planet in an 18.25-d, eccentric (0.19 +/- 0.04) orbit around K2-99, an 11th magnitude subgiant in Virgo. We confirm the planetary nature of the companion with radial velocities, and determine that the star is a metal-rich ([ Fe/H] = 0.20 +/- 0.05) subgiant, with mass 1.60(+0.14) (-0.10) M (circle dot) and radius 3.1 +/- 0.1 R-circle dot. The planet has a mass of 0.97 +/- 0.09 M-Jup and a radius 1.29 +/- 0.05 R-Jup. A measured systemic radial acceleration of -2.12 +/- 0.04 ms(- 1) d(- 1) offers compelling evidence for the existence of a third body in the system, perhaps a brown dwarf orbiting with a period of several hundred days.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Smith, A. M. S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Gandolfi, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Barragan, O. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bowler, B. UNSPECIFIED UNSPECIFIED UNSPECIFIED Csizmadia, Sz. UNSPECIFIED UNSPECIFIED UNSPECIFIED Endl, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Fridlund, M. C. V. UNSPECIFIED UNSPECIFIED UNSPECIFIED Grziwa, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Guenther, E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Hatzes, A. P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Nowak, G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Albrecht, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Alonso, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Cabrera, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Cochran, W. D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Deeg, H. J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Cusano, F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Eigmueller, Ph. UNSPECIFIED UNSPECIFIED UNSPECIFIED Erikson, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Hidalgo, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Hirano, T. UNSPECIFIED UNSPECIFIED UNSPECIFIED Johnson, M. C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Korth, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Mann, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Narita, N. UNSPECIFIED UNSPECIFIED UNSPECIFIED Nespral, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Palle, E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Paetzold, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Prieto-Arranz, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Rauer, H. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ribas, I. UNSPECIFIED UNSPECIFIED UNSPECIFIED Tingley, B. UNSPECIFIED UNSPECIFIED UNSPECIFIED Wolthoff, V. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-247496
DOI:	10.1093/mnras/stw2487
Journal or Publication Title:	Mon. Not. Roy. Astron. Soc.
Volume:	464
Number:	3
Page Range:	S. 2708 - 2717
Date:	2017
Publisher:	OXFORD UNIV PRESS
Place of Publication:	OXFORD
ISSN:	1365-2966
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language PLANET-PLANET INTERACTIONS; BROWN DWARF DESERT; SOLAR-TYPE STARS; HOT-JUPITERS; RADIAL-VELOCITY; EXTRASOLAR PLANETS; MASS-DISTRIBUTION; GIANT PLANETS; LIGHT CURVES; KEPLER Multiple languages Astronomy & Astrophysics Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/24749