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

Nespral, D.; Gandolfi, Davide; Deeg, H. J.; Borsato, L.; Fridlund, M. C.V.; Barragán, O.; Alonso, R.; Grziwa, S.; Korth, J.; Albrecht, S.; Cabrera, J.; Csizmadia, Sz; Nowak, G.; Kuutma, T.; Saario, J.; Eigmüller, P.; Erikson, A.; Guenther, E. W.; Hatzes, A. P.; Montañés Rodríguez, P.; Palle, E.; Pätzold, M.; Prieto-Arranz, J.; Rauer, H.; Sebastian, D.

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

Mark

Nespral, D. ; Gandolfi, Davide ; Deeg, H. J. ; Borsato, L. ; Fridlund, M. C.V. ; Barragán, O. ; Alonso, R. ; Grziwa, S. ; Korth, J. ^LU and Albrecht, S. , et al. (2017) In Astronomy and Astrophysics 601.

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 ± 7.5M_⊕ and provides a marginal detection of K2-19c, with a mass of M_c = M_⊕. 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 ± 8.9M_⊕ for K2-19b and of M_⊕ for K2-19c. For K2-19b, these masses are consistent with a previous determination... (More); 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 ± 7.5M_⊕ and provides a marginal detection of K2-19c, with a mass of M_c = M_⊕. 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 ± 8.9M_⊕ for K2-19b and of M_⊕ 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.
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Please use this url to cite or link to this publication: https://lup.lub.lu.se/record/922b2ec0-7724-4566-9cdb-0e56762d2cee

author

Nespral, D. ; Gandolfi, Davide ; Deeg, H. J. ; Borsato, L. ; Fridlund, M. C.V. ; Barragán, O. ; Alonso, R. ; Grziwa, S. ; Korth, J. ^LU and Albrecht, S. , et al. (More)

Nespral, D. ; Gandolfi, Davide ; Deeg, H. J. ; Borsato, L. ; Fridlund, M. C.V. ; Barragán, O. ; Alonso, R. ; Grziwa, S. ; Korth, J. ^LU ; Albrecht, S. ; Cabrera, J. ; Csizmadia, Sz ; Nowak, G. ; Kuutma, T. ; Saario, J. ; Eigmüller, P. ; Erikson, A. ; Guenther, E. W. ; Hatzes, A. P. ; Montañés Rodríguez, P. ; Palle, E. ; Pätzold, M. ; Prieto-Arranz, J. ; Rauer, H. and Sebastian, D. (Less)

publishing date

2017-05-01

type

Contribution to journal

publication status

published

keywords

Planets and satellites: fundamental parameters, Stars: fundamental parameters, Stars: individual: K2-19, Techniques: radial velocities, Techniques: spectroscopic

in

Astronomy and Astrophysics

volume

601

article number

A128

publisher

EDP Sciences

external identifiers

scopus:85019833865

ISSN

0004-6361

DOI

10.1051/0004-6361/201628639

language

English

LU publication?

no

additional info

id

922b2ec0-7724-4566-9cdb-0e56762d2cee

date added to LUP

2023-02-02 12:56:04

date last changed

2023-02-20 16:22:48

@article{922b2ec0-7724-4566-9cdb-0e56762d2cee,
  abstract     = {{<p>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 ± 7.5M<sub>⊕</sub> and provides a marginal detection of K2-19c, with a mass of M<sub>c</sub> = M<sub>⊕</sub>. 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 ± 8.9M<sub>⊕</sub> for K2-19b and of M<sub>⊕</sub> 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.</p>}},
  author       = {{Nespral, D. and Gandolfi, Davide and Deeg, H. J. and Borsato, L. and Fridlund, M. C.V. and Barragán, O. and Alonso, R. and Grziwa, S. and Korth, J. and Albrecht, S. and Cabrera, J. and Csizmadia, Sz and Nowak, G. and Kuutma, T. and Saario, J. and Eigmüller, P. and Erikson, A. and Guenther, E. W. and Hatzes, A. P. and Montañés Rodríguez, P. and Palle, E. and Pätzold, M. and Prieto-Arranz, J. and Rauer, H. and Sebastian, D.}},
  issn         = {{0004-6361}},
  keywords     = {{Planets and satellites: fundamental parameters; Stars: fundamental parameters; Stars: individual: K2-19; Techniques: radial velocities; Techniques: spectroscopic}},
  language     = {{eng}},
  month        = {{05}},
  publisher    = {{EDP Sciences}},
  series       = {{Astronomy and Astrophysics}},
  title        = {{Mass determination of K2-19b and K2-19c from radial velocities and transit timing variations}},
  url          = {{http://dx.doi.org/10.1051/0004-6361/201628639}},
  doi          = {{10.1051/0004-6361/201628639}},
  volume       = {{601}},
  year         = {{2017}},
}

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