CaltechAUTHORS
Published August 21, 2018 | Version Published
Journal Article Open

K2-237 b and K2-238 b: discovery and characterization of two new transiting hot Jupiters from K2

Creators

  • 1. ROR icon University of Chile
  • 2. ROR icon Centro de Astrofísica y Tecnologías Afines
  • 3. ROR icon Pontificia Universidad Católica de Chile
  • 4. ROR icon Max Planck Institute for Astronomy
  • 5. ROR icon Millennium Institute of Astrophysics
  • 6. ROR icon European Southern Observatory
  • 7. ROR icon Princeton University
  • 8. ROR icon NASA Exoplanet Science Institute
  • 9. ROR icon Massachusetts Institute of Technology
  • 10. ROR icon University of California, Berkeley
  • 11. ROR icon University of California, Santa Cruz

Abstract

We report the discovery of two hot Jupiters orbiting the stars K2-237 and K2-238. We used photometric data from Campaigns 11 and 12 of the Kepler K2mission and radial velocity data obtained using the HARPS, FEROS, and CORALIE spectrographs. K2-237 b and K2-238 b have masses of 1.60^(+0.11)_(−0.11) and 0.86^(+0.13)_(−0.12) M_(Jup), radii of 1.65^(+0.07)_(−0.08) and 1.30^(+0.15)_(−0.14) R_(Jup), and are orbiting their host stars in 2.18- and 3.20-d orbits, respectively. The large radius of K2-237 b leads us to conclude that this candidate corresponds to a highly inflated hot Jupiter. K2-238 b has a radius consistent with theoretical models, considering the high incident flux falling on the planet. We consider K2-237 b to be an excellent system for follow-up studies, since not only is it very inflated, but it also orbits a relatively bright star (V = 11.6).

Additional Information

© 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society. This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model (https://academic.oup.com/journals/pages/about_us/legal/notices). Accepted 2018 May 17. Received 2018 May 16; in original form 2018 January 23. Published: 18 May 2018. MGS acknowledges the support of CONICYT-PFCHA/Doctorado Nacional-21141037, Chile. MRD is supported by CONICYT-PFCHA/Doctorado Nacional-21140646, Chile. JSJ acknowledges support by FONDECYT grant 1161218 and partial support by CATA-Basal (PB06, CONICYT). AJ acknowledges support from FONDECYT project 1171208, BASAL CATA PFB-06, and by the Ministry for the Economy, Development, and Tourism's Programa Iniciativa Científica Milenio through grant IC 120009, awarded to the Millennium Institute of Astrophysics (MAS). HD acknowledges support from FONDECYT Postdoctorado 3150314 and FONDECYT Regular 1171364, from Fondo Nacional de Desarrollo Científico y Tecnológico. RL acknowledges support from BASAL CATA PFB-06. This research has made use of the VizieR catalogue access tool, CDS, Strasbourg, France. The original description of the VizieR service was published in A&AS 143, 23.

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Additional details

Identifiers

Eprint ID
89294
Resolver ID
CaltechAUTHORS:20180830-075657106

Funding

Comisión Nacional de Investigación Científica y Tecnológica (CONICYT)
21141037
Comisión Nacional de Investigación Científica y Tecnológica (CONICYT)
21140646
Fondo Nacional de Desarrollo Científico y Tecnológico (FONDECYT)
1161218
CATA-Basal
PB06
Fondo Nacional de Desarrollo Científico y Tecnológico (FONDECYT)
1171208
Iniciativa Científica Milenio del Ministerio de Economía, Fomento y Turismo
IC120009
Fondo Nacional de Desarrollo Científico y Tecnológico (FONDECYT)
3150314
Fondo Nacional de Desarrollo Científico y Tecnológico (FONDECYT)
1171364

Dates

Created
2018-08-30
Created from EPrint's datestamp field
Updated
2021-11-16
Created from EPrint's last_modified field

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Caltech groups
Infrared Processing and Analysis Center (IPAC)