K2-139 b : A low-mass warm Jupiter on a 29-d orbit transiting an active K0 V star

Barragán, 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.; Eigmüller, Ph; Eiroa, C.; Erikson, A.; Guenther, E.; Korth, J.; Lorenzo-Oliveira, D.; Mancini, L.; Pätzold, M.; Prieto-Arranz, J.; Rauer, H.; Rebollido, I.; Saario, J.; Zakhozhay, O. V.

K2-139 b : A low-mass warm Jupiter on a 29-d orbit transiting an active K0 V star

Mark

Barragán, O. ; Gandolfi, D. ; Smith, A. M.S. ; Deeg, H. J. ; Fridlund, M. C.V. ; Persson, C. M. ; Donati, P. ; Endl, M. ; Csizmadia, Sz and Grziwa, S. , et al. (2018) In Monthly Notices of the Royal Astronomical Society 475(2). p.1765-1776

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 (logR' _HK =-4.46±0.06) K0V star in K2 Campaign 7.We derive the system's parameters by combining the K2 photometry with groundbased follow-up observations. With a mass of 0.387 _-0.033^+0.075 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^-3can be explained with a core of ~50M_⊕. Given the brightness of the host star (V=11.653 mag), the relatively short... (More); 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 (logR' _HK =-4.46±0.06) K0V star in K2 Campaign 7.We derive the system's parameters by combining the K2 photometry with groundbased follow-up observations. With a mass of 0.387 _-0.033^+0.075 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^-3can be explained with a core of ~50M_⊕. Given the brightness of the host star (V=11.653 mag), the relatively short transit duration (~5 h), and the expected amplitude of the Rossiter-McLaughlin effect (~25m s^-1), K2-139 is an ideal target to measure the spin-orbit angle of a planetary system hosting a warm Jupiter.
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Please use this url to cite or link to this publication: https://lup.lub.lu.se/record/875bbd3a-3094-4072-bbb5-fe3d46473147

author

Barragán, O. ; Gandolfi, D. ; Smith, A. M.S. ; Deeg, H. J. ; Fridlund, M. C.V. ; Persson, C. M. ; Donati, P. ; Endl, M. ; Csizmadia, Sz and Grziwa, S. , et al. (More)

Barragán, 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. ; Eigmüller, Ph ; Eiroa, C. ; Erikson, A. ; Guenther, E. ; Korth, J. ^LU ; Lorenzo-Oliveira, D. ; Mancini, L. ; Pätzold, M. ; Prieto-Arranz, J. ; Rauer, H. ; Rebollido, I. ; Saario, J. and Zakhozhay, O. V. (Less)

publishing date

2018-04-01

type

Contribution to journal

publication status

published

keywords

Planetary systems, Planets and satellites: detection, Planets and satellites: individual: K2-139 b (EPIC 218916923b), Stars: fundamental parameters

in

Monthly Notices of the Royal Astronomical Society

volume

475

issue

2

pages

12 pages

publisher

Oxford University Press

external identifiers

scopus:85046107892

ISSN

0035-8711

DOI

10.1093/mnras/stx3207

language

English

LU publication?

no

additional info

id

875bbd3a-3094-4072-bbb5-fe3d46473147

date added to LUP

2023-02-02 11:30:23

date last changed

2023-02-20 14:25:45

@article{875bbd3a-3094-4072-bbb5-fe3d46473147,
  abstract     = {{<p>We announce the discovery of K2-139 b (EPIC 218916923 b), a transiting warm-Jupiter (T<sub>eq</sub> = 547± 25 K) on a 29-d orbit around an active (logR' <sub>HK</sub> =-4.46±0.06) K0V star in K2 Campaign 7.We derive the system's parameters by combining the K2 photometry with groundbased follow-up observations. With a mass of 0.387 <sub>-0.033</sub><sup>+0.075</sup> M<sub>J</sub> and radius of 0.808 <sub>-0.033</sub><sup>+0.034</sup> R<sub>J</sub>, K2-139 b is one of the transiting warm Jupiters with the lowest mass known to date. The planetary mean density of 0.91 <sub>-0.20</sub><sup>+0.24</sup> g cm<sup>-3</sup>can be explained with a core of ~50M<sub>⊕</sub>. Given the brightness of the host star (V=11.653 mag), the relatively short transit duration (~5 h), and the expected amplitude of the Rossiter-McLaughlin effect (~25m s<sup>-1</sup>), K2-139 is an ideal target to measure the spin-orbit angle of a planetary system hosting a warm Jupiter.</p>}},
  author       = {{Barragán, O. and Gandolfi, D. and Smith, A. M.S. and Deeg, H. J. and Fridlund, M. C.V. and Persson, C. M. and Donati, P. and Endl, M. and Csizmadia, Sz and Grziwa, S. and Nespral, D. and Hatzes, A. P. and Cochran, W. D. and Fossati, L. and Brems, S. S. and Cabrera, J. and Cusano, F. and Eigmüller, Ph and Eiroa, C. and Erikson, A. and Guenther, E. and Korth, J. and Lorenzo-Oliveira, D. and Mancini, L. and Pätzold, M. and Prieto-Arranz, J. and Rauer, H. and Rebollido, I. and Saario, J. and Zakhozhay, O. V.}},
  issn         = {{0035-8711}},
  keywords     = {{Planetary systems; Planets and satellites: detection; Planets and satellites: individual: K2-139 b (EPIC 218916923b); Stars: fundamental parameters}},
  language     = {{eng}},
  month        = {{04}},
  number       = {{2}},
  pages        = {{1765--1776}},
  publisher    = {{Oxford University Press}},
  series       = {{Monthly Notices of the Royal Astronomical Society}},
  title        = {{K2-139 b : A low-mass warm Jupiter on a 29-d orbit transiting an active K0 V star}},
  url          = {{http://dx.doi.org/10.1093/mnras/stx3207}},
  doi          = {{10.1093/mnras/stx3207}},
  volume       = {{475}},
  year         = {{2018}},
}

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K2-139 b : A low-mass warm Jupiter on a 29-d orbit transiting an active K0 V star