Universität zu Köln

Barragan, O., Gandolfi, D., Smith, A. M. S., Deeg, H. J., Fridlund, M. C. V., Persson, C. M., Donati, P., Endl, M., Csizmadia, Sz., Grziwa, S., Nespral, D., Hatzes, A. P., Cochran, W. D., Fossati, L., Brems, S. S., Cabrera, J., Cusano, F., Eigmuller, Ph., Eiroa, C., Erikson, A., Guenther, E., Korth, J., Lorenzo-Oliveira, D., Mancini, L., Paetzold, M., Prieto-Arranz, J., Rauer, H., Rebollido, I., Saario, J. and Zakhozhay, O. V. (2018). K2-139 b: a low-mass warm Jupiter on a 29-d orbit transiting an active K0 V star. Mon. Not. Roy. Astron. Soc., 475 (2). S. 1765 - 1777. OXFORD: OXFORD UNIV PRESS. ISSN 1365-2966

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Abstract

We announce the discovery of K2-139 b (EPIC 218916923 b), a transiting warm- Jupiter (T-eq = 547 +/- 25 K) on a 29-d orbit around an active (log R'(HK)= -4.46 +/- 0.06) K0V star in K2 Campaign 7. We derive the system's parameters by combining the K2 photometry with ground-based follow-up observations. With a mass of 0.387(-0.075)(+0.083) M-J and radius of 0.808(-0.033)(+0.034) R-J, K2-139 b is one of the transiting warm Jupiters with the lowest mass known to date. The planetary mean density of 0.91(-0.20)(+0.24) g cm(-3) can be explained with a core of similar to 50M circle dot. Given the brightness of the host star (V = 11.653 mag), the relatively short transit duration (similar to 5 h), and the expected amplitude of the Rossiter-McLaughlin effect (similar to 25m s(-1)), K2-139 is an ideal target to measure the spin-orbit angle of a planetary system hosting a warm Jupiter.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Barragan, O. UNSPECIFIED UNSPECIFIED UNSPECIFIED Gandolfi, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Smith, A. M. S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Deeg, H. J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Fridlund, M. C. V. UNSPECIFIED UNSPECIFIED UNSPECIFIED Persson, C. M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Donati, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Endl, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Csizmadia, Sz. UNSPECIFIED UNSPECIFIED UNSPECIFIED Grziwa, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Nespral, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Hatzes, A. P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Cochran, W. D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Fossati, L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Brems, S. S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Cabrera, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Cusano, F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Eigmuller, Ph. UNSPECIFIED UNSPECIFIED UNSPECIFIED Eiroa, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Erikson, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Guenther, E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Korth, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Lorenzo-Oliveira, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Mancini, L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Paetzold, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Prieto-Arranz, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Rauer, H. UNSPECIFIED UNSPECIFIED UNSPECIFIED Rebollido, I. UNSPECIFIED UNSPECIFIED UNSPECIFIED Saario, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Zakhozhay, O. V. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-192116
DOI:	10.1093/mnras/stx3207
Journal or Publication Title:	Mon. Not. Roy. Astron. Soc.
Volume:	475
Number:	2
Page Range:	S. 1765 - 1777
Date:	2018
Publisher:	OXFORD UNIV PRESS
Place of Publication:	OXFORD
ISSN:	1365-2966
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language LIGHT CURVES; COOL STARS; ECCENTRIC ORBIT; PLANET; EXOPLANETS; SEARCH; ATMOSPHERES; TELESCOPE; EVOLUTION; SPECTRA Multiple languages Astronomy & Astrophysics Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/19211