K2-140b – an eccentric 6.57 d transiting hot Jupiter in Virgo. Issue 2 (5th January 2018)

• Record Type: Journal Article
• Authors: Giles, H A C; Bayliss, D; Espinoza, N; Brahm, R; Blanco-Cuaresma, S; Shporer, A; Armstrong, D; Lovis, C; Udry, S; Bouchy, F; Marmier, M; Jordán, A; Bento, J; Cameron, A Collier; Sefako, R; Cochran, W D; Rojas, F; Rabus, M; Jenkins, J S; Jones, M; Pantoja, B; Soto, M; Jensen-Clem, R; Duev, D A; Salama, M; Riddle, R; Baranec, C; Law, N M
• Is Part Of: Monthly notices of the Royal Astronomical Society. Volume 475:Issue 2(2018)
• Page Start: 1809
• Page End: 1818
• Publication Date: 2018-01-05
• Subjects: techniques: high angular resolution -- techniques: photometric -- techniques: radial velocities -- planets and satellites: detection -- stars: individual: K2-140; Astronomy -- Periodicals; Periodicals; 520.5
• DOI: 10.1093/mnras/stx3300
• Languages: English
• ISSNs: 0035-8711

Abstract

Abstract: We present the discovery of K2-140b, a P = 6.57 d Jupiter-mass ( MP = 1.019 ± 0.070MJup ) planet transiting a V = 12.5 (G5-spectral type) star in an eccentric orbit (e = $0.120^{+0.056}_{-0.046}$ ) detected using a combination of K2 photometry and ground-based observations. With a radius of 1.095 ± 0.018 RJup, the planet has a bulk density of 0.726 ± 0.062 ρJup . The host star has a [Fe/H] of 0.12 ± 0.045, and from the K2 light curve, we find a rotation period for the star of 16.3 ± 0.1 d. This discovery is the 9th hot Jupiter from K2 and highlights K2 's ability to detect transiting giant planets at periods slightly longer than traditional, ground-based surveys. This planet is slightly inflated, but much less than others with similar incident fluxes. These are of interest for investigating the inflation mechanism of hot Jupiters.