Universität zu Köln

Nespral, D., Gandolfi, D., Deeg, H. J., Borsato, L., Fridlund, M. C. V., Barragan, O., Alonso, R., Grziwa, S., Korth, J., Albrecht, S., Cabrera, J., Csizmadia, Sz., Nowak, G., Kuutma, T., Saario, J., Eigmueller, P., Erikson, A., Guenther, E. W., Hatzes, A. P., Montanes Rodriguez, P., Palle, E., Paetzold, M., Prieto-Arranz, J., Rauer, H. and Sebastian, D. (2017). Mass determination of K2-19b and K2-19c from radial velocities and transit timing variations. Astron. Astrophys., 601. LES ULIS CEDEX A: EDP SCIENCES S A. ISSN 1432-0746

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Abstract

We present radial velocity follow-up observations of K2-19, a compact planetary system hosting three planets, of which the two larger ones, K2-19b and K2-19c, are close to the 3: 2 mean motion resonance. An analysis considering only the radial velocity measurements detects K2-19b, the larger and more massive planet in the system, with a mass of 54.8 +/- 7.5 M-circle plus and provides a marginal detection of K2-19c, with a mass of M-c = 5.9(-4.3)(+7.6) M-circle plus. We also used the TRADES code to simultaneously model both our RV measurements and the existing transit timing measurements. We derived a mass of 54.4 +/- 8.9 M-circle plus for K2-19b and of 7.5(-1.4)(+3.0) M-circle plus for K2-19c. For K2-19b, these masses are consistent with a previous determination that was principally based on a photodynamical analysis of the K2-19 light curve. Differences remain mainly in the mass determination of the more lightweight planet, driven likely by the limited precision of the RV measurements and possibly some as yet unrecognized systematics.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Nespral, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Gandolfi, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Deeg, H. J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Borsato, L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Fridlund, M. C. V. UNSPECIFIED UNSPECIFIED UNSPECIFIED Barragan, O. UNSPECIFIED UNSPECIFIED UNSPECIFIED Alonso, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Grziwa, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Korth, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Albrecht, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Cabrera, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Csizmadia, Sz. UNSPECIFIED UNSPECIFIED UNSPECIFIED Nowak, G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Kuutma, T. UNSPECIFIED UNSPECIFIED UNSPECIFIED Saario, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Eigmueller, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Erikson, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Guenther, E. W. UNSPECIFIED UNSPECIFIED UNSPECIFIED Hatzes, A. P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Montanes Rodriguez, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Palle, E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Paetzold, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Prieto-Arranz, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Rauer, H. UNSPECIFIED UNSPECIFIED UNSPECIFIED Sebastian, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-231975
DOI:	10.1051/0004-6361/201628639
Journal or Publication Title:	Astron. Astrophys.
Volume:	601
Date:	2017
Publisher:	EDP SCIENCES S A
Place of Publication:	LES ULIS CEDEX A
ISSN:	1432-0746
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language MEAN-MOTION RESONANCES; WIRE SATELLITE; PLANETS; SYSTEM; STARS; SPECTROGRAPH; CONSTRAINTS; PARAMETERS; MIGRATION; KEPLER Multiple languages Astronomy & Astrophysics Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/23197