THE K2-ESPRINT PROJECT. II. SPECTROSCOPIC FOLLOW-UP OF THREE EXOPLANET SYSTEMS FROM CAMPAIGN 1 OF K2
Author(s)
Nowak, Grzegorz; Albrecht, Simon; Palle, Enric; Ribas, Ignasi; Bruntt, Hans; Perger, Manuel; Gandolfi, Davide; Hirano, Teriyuki; Sanchis-Ojeda, Roberto; Kiilerich, Amanda; Prieto-Arranz, Jorge; Badenas, Mariona; Deeg, Hans J.; Guenther, Eike W.; Montañés-Rodríguez, Pilar; Narita, Norio; Rogers, Leslie A.; Béjar, Víctor J. S.; Shrotriya, Tushar S.; Sebastian, Daniel; Van Eylen, Vincent; Dai, Fei; Winn, Joshua Nathan; ... Show more Show less
DownloadEylen-2016-THE K2-ESPRINT PROJE.pdf (653.2Kb)
PUBLISHER_POLICY
Publisher Policy
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Terms of use
Metadata
Show full item recordAbstract
We report on Doppler observations of three transiting planet candidates that were detected during Campaign 1 of the K2 mission. The Doppler observations were conducted with FIES, HARPS-N, and HARPS. We measure the mass of EPIC 201546283b, and provide constraints and upper limits for EPIC 201295312b and EPIC 201577035b. EPIC 201546283b is a warm Neptune orbiting its host star in 6.77 days and has a radius of 4.45[subscript -0.33][superscript +0.33]R[subscript ⊕] and a mass of 29.1[subscript -7.4][superscript +7.5]M[subscript ⊕], which leads to a mean density of 1.80[subscript -0.55][superscript +0.70]sg cm[superscript -3]. EPIC 201295312b is smaller than Neptune with an orbital period of 5.66 days, a radius of 2.75[subscript -0.22][superscript+0.24] R[subscript ⊕], and we constrain the mass to be below 12M[subscript ⊕] at 95% confidence. We also find a long-term trend indicative of another body in the system. EPIC 201577035b, which was previously confirmed as the planet K2-10b, is smaller than Neptune, orbiting its host star in 19.3 days, with a radius of 3.84[subscript -0.34][subscript +0.35]R[subscript ⊕]. We determine its mass to be 27[subscript -16][superscript +17]M[subscript ⊕], with a 95% confidence upper limit at 57 M[subscript ⊕], and a mean density of 2.6[subscript -1.6][superscript +2.1]g cm[superscript -3]. These measurements join the relatively small collection of planets smaller than Neptune with measurements or constraints of the mean density. Our code for performing K2 photometry and detecting planetary transits is now publicly available.
Date issued
2016-03Department
Massachusetts Institute of Technology. Department of Physics; MIT Kavli Institute for Astrophysics and Space ResearchJournal
Astrophysical Journal
Publisher
IOP Publishing
Citation
Eylen, Vincent Van, Grzegorz Nowak, Simon Albrecht, Enric Palle, Ignasi Ribas, Hans Bruntt, Manuel Perger, et al. “ THE K 2-ESPRINT PROJECT. II. SPECTROSCOPIC FOLLOW-UP OF THREE EXOPLANET SYSTEMS FROM CAMPAIGN 1 OF K 2 .” The Astrophysical Journal 820, no. 1 (March 17, 2016): 56. doi:10.3847/0004-637x/820/1/56.
Version: Final published version
ISSN
1538-4357