K2-114b and K2-115b: Two Transiting Warm Jupiters

Shporer, Avi and Zhou, George ORCID: https://orcid.org/0000-0002-4891-3517 and Fulton, Benjamin J. and Vanderburg, Andrew and Espinoza, Nestor and Collins, Karen and Ciardi, David and Bayliss, Daniel and Armstrong, James D. and Bento, Joao and Bouchy, Francois and Cochran, William D. and Collier Cameron, Andrew and Colon, Knicole and Crossfield, Ian and Dragomir, Diana and Howard, Andrew W. and Howell, Steve B. and Isaacson, Howard and Kielkopf, John F. and Murgas, Felipe and Sefako, Ramotholo and Sinukoff, Evan and Siverd, Robert and Udry, Stephane (2017) K2-114b and K2-115b: Two Transiting Warm Jupiters. The Astronomical Journal, 154 (5):188. pp. 1-11. ISSN 0004-6256

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We report the first results from a search for transiting warm Jupiter exoplanets - gas giant planets receiving stellar irradiation below about 108 erg s-1 cm-2, equivalent to orbital periods beyond about 10 days around Sun-like stars. We have discovered two transiting warm Jupiter exoplanets initially identified as transiting candidates in K2 photometry. K2-114b has a mass of , a radius of , and an orbital period of 11.4 days. K2-115b has a mass of , a radius of , and an orbital period of 20.3 days. Both planets are among the longest-period transiting gas giant planets with a measured mass, and they are orbiting relatively old host stars. Both planets are not inflated, as their radii are consistent with theoretical expectations. Their position in the planet radius-stellar irradiation diagram is consistent with the scenario where the radius-irradiation correlation levels off below about 108 erg s-1 cm-2, suggesting that for warm Jupiters stellar irradiation does not play a significant role in determining the planet radius. We also report our identification of another K2 transiting warm Jupiter candidate, EPIC 212504617, as a false positive.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: No Faculty
Faculty/School / Institute/Centre: No Faculty
Date Deposited: 07 Feb 2022 05:40
Last Modified: 14 Feb 2022 00:19
Uncontrolled Keywords: stars: individual (K2-114; EPIC 211418729; K2-115; EPIC 211442297; EPIC 212504617); Astrophysics - Earth and Planetary Astrophysics
Fields of Research (2008): 02 Physical Sciences > 0201 Astronomical and Space Sciences > 020110 Stellar Astronomy and Planetary Systems
Fields of Research (2020): 51 PHYSICAL SCIENCES > 5101 Astronomical sciences > 510109 Stellar astronomy and planetary systems
Socio-Economic Objectives (2008): E Expanding Knowledge > 97 Expanding Knowledge > 970102 Expanding Knowledge in the Physical Sciences
Socio-Economic Objectives (2020): 28 EXPANDING KNOWLEDGE > 2801 Expanding knowledge > 280120 Expanding knowledge in the physical sciences
Identification Number or DOI: https://doi.org/10.3847/1538-3881/aa8bb9
URI: http://eprints.usq.edu.au/id/eprint/45027

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