Skip to main content

HATS-7b: A Hot Super Neptune Transiting a Quiet K Dwarf Star

Author(s): Bakos, Gaspar Aron; Penev, K; Bayliss, D; Hartman, Joel D.; Zhou, G; et al

Download
To refer to this page use: http://arks.princeton.edu/ark:/88435/pr1s12v
Full metadata record
DC FieldValueLanguage
dc.contributor.authorBakos, Gaspar Aron-
dc.contributor.authorPenev, K-
dc.contributor.authorBayliss, D-
dc.contributor.authorHartman, Joel D.-
dc.contributor.authorZhou, G-
dc.contributor.authorBrahm, R-
dc.contributor.authorMancini, L-
dc.contributor.authorde Val-Borro, Miguel-
dc.contributor.authorBhatti, W-
dc.contributor.authorJordán, A.-
dc.contributor.authorRabus, M-
dc.contributor.authorEspinoza, N-
dc.contributor.authorCsubry, Zoltan-
dc.contributor.authorHoward, AW-
dc.contributor.authorFulton, BJ-
dc.contributor.authorBuchhave, Lars A.-
dc.contributor.authorCiceri, S-
dc.contributor.authorHenning, T-
dc.contributor.authorSchmidt, B-
dc.contributor.authorIsaacson, H-
dc.contributor.authorNoyes, Robert W.-
dc.contributor.authorMarcy, GW-
dc.contributor.authorSuc, V-
dc.contributor.authorHowe, AR-
dc.contributor.authorBurrows, Adam S.-
dc.contributor.authorLázár, J.-
dc.contributor.authorPapp, I-
dc.contributor.authorSári, P-
dc.date.accessioned2019-04-10T19:31:36Z-
dc.date.available2019-04-10T19:31:36Z-
dc.date.issued2015-11-10en_US
dc.identifier.citationBakos, GÁ, Penev, K, Bayliss, D, Hartman, JD, Zhou, G, Brahm, R, Mancini, L, de Val-Borro, M, Bhatti, W, Jordán, A, Rabus, M, Espinoza, N, Csubry, Z, Howard, AW, Fulton, BJ, Buchhave, LA, Ciceri, S, Henning, T, Schmidt, B, Isaacson, H, Noyes, RW, Marcy, GW, Suc, V, Howe, AR, Burrows, AS, Lázár, J, Papp, I, Sári, P. (2015). HATS-7b: A Hot Super Neptune Transiting a Quiet K Dwarf Star. \apj, 813 (111 - 111. doi:10.1088/0004-637X/813/2/111en_US
dc.identifier.urihttp://arks.princeton.edu/ark:/88435/pr1s12v-
dc.description.abstractWe report the discovery by the HATSouth network of HATS-7b, a transiting Super-Neptune with a mass of 0.120 ± 0.012 MJ, a radius of 0.563 0.034 0.046 - + RJ, and an orbital period of 3.1853 days. The host star is a moderately bright (V =  13.340 0.010 mag, KS =  10.976 0.026 mag) K dwarf star with a mass of 0.849 ± 0.027 M, a radius of 0.815 0.035 0.049 - + R, and a metallicity of [ ] Fe H =+  0.250 0.080. The star is photometrically quiet to within the precision of the HATSouth measurements, has low RV jitter, and shows no evidence for chromospheric activity in its spectrum. HATS-7b is the second smallest radius planet discovered by a wide-field ground-based transit survey, and one of only a handful of Neptune-size planets with mass and radius determined to 10% precision. Theoretical modeling of HATS-7b yields a hydrogen–helium fraction of 18 ± 4% (rock-iron core and H2–He envelope), or 9 ± 4% (ice core and H2–He envelope), i.e., it has a composition broadly similar to that of Uranus and Neptune, and very different from that of Saturn, which has 75% of its mass in H2–He. Based on a sample of transiting exoplanets with accurately (<20%) determined parameters, we establish approximate powerlaw relations for the envelopes of the mass–density distribution of exoplanets. HATS-7b, which, together with the recently discovered HATS-8b, is one of the first two transiting super-Neptunes discovered in the Southern sky, is a prime target for additional follow-up observations with Southern hemisphere facilities to characterize the atmospheres of Super-Neptunes (which we define as objects with mass greater than that of Neptune, and smaller than halfway between that of Neptune and Saturn, i.e., 0.054 0.18 MM M Jp J < < ).en_US
dc.language.isoen_USen_US
dc.relation.ispartofAstrophysical Journalen_US
dc.rightsFinal published version. This is an open access article.en_US
dc.titleHATS-7b: A Hot Super Neptune Transiting a Quiet K Dwarf Staren_US
dc.typeJournal Articleen_US
dc.identifier.doidoi:10.1088/0004-637X/813/2/111-
dc.date.eissued2015-11-04en_US
pu.type.symplectichttp://www.symplectic.co.uk/publications/atom-terms/1.0/journal-articleen_US

Files in This Item:
File Description SizeFormat 
Bakos_2015_ApJ_813_111.pdf734.53 kBAdobe PDFView/Download
apj520627t2_mrt.txt399.55 kBTextView/Download


Items in OAR@Princeton are protected by copyright, with all rights reserved, unless otherwise indicated.