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Mass determination of K2-19b and K2-19c from radial velocities and transit timing variations

Nespral, D. (author)
Universidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias
Gandolfi, D. (author)
Universita degli Studi di Torino,University of Turin
Deeg, H. J. (author)
Universidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias
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Borsato, L. (author)
Università Degli Studi di Padova,University of Padua
Fridlund, Malcolm, 1952 (author)
Chalmers tekniska högskola,Chalmers University of Technology
Barragán, O. (author)
Universita degli Studi di Torino,University of Turin
Alonso, R. (author)
Universidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias
Grziwa, S. (author)
Universität zu Köln,University of Cologne
Korth, J. (author)
Universität zu Köln,University of Cologne
Albrecht, S. (author)
Århus Universitet,Aarhus University
Cabrera, J. (author)
Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)
Csizmadia, S. (author)
Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)
Nowak, G. (author)
Instituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna
Kuutma, T. (author)
Nordic Optical Telescope
Saario, J. (author)
Nordic Optical Telescope
Eigmüller, Philipp (author)
Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)
Erikson, A. (author)
Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)
Guenther, E. W. (author)
Thüringer Landessternwarte Tautenburg
Hatzes, A. (author)
Thüringer Landessternwarte Tautenburg
Rodriguez, P. M. (author)
Universidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias
Palle, E. (author)
Instituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna
Patzold, M. (author)
Universität zu Köln,University of Cologne
Prieto-Arranz, J. (author)
Universidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias
Rauer, H. (author)
Technische Universität Berlin,Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)
Sebastian, D. (author)
Thüringer Landessternwarte Tautenburg
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 (creator_code:org_t)
2017-05-19
2017
English.
In: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 601, s. Article Number: A128-
Related links:
http://dx.doi.org/10...
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https://doi.org/10.1...
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  • Journal article (peer-reviewed)
Abstract Subject headings
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  • 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.

Subject headings

NATURVETENSKAP  -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)

Keyword

techniques: radial velocities
stars: individual: K2-19
planets and satellites: fundamental parameters
techniques: spectroscopic
stars: fundamental parameters

Publication and Content Type

art (subject category)
ref (subject category)

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