K2-139 b : A low-mass warm Jupiter on a 29-d orbit transiting an active K0 V star
(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 (Teq = 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 MJ and radius of 0.808 -0.033+0.034 RJ, 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 (Teq = 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 MJ and radius of 0.808 -0.033+0.034 RJ, 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.
(Less)
- author
- 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
- Publisher Copyright: © 2018 The Author(s).
- 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}}, }