TY - JOUR
T1 - Hats-18B
T2 - An extreme short-period massive transiting planet spinning up its star
AU - Penev, K.
AU - Hartman, J. D.
AU - Bakos, G.
AU - Ciceri, S.
AU - Brahm, R.
AU - Bayliss, D.
AU - Bento, J.
AU - Jordán, A.
AU - Csubry, Z.
AU - Bhatti, W.
AU - De Val-Borro, M.
AU - Espinoza, N.
AU - Zhou, G.
AU - Mancini, L.
AU - Rabus, M.
AU - Suc, V.
AU - Henning, T.
AU - Schmidt, B.
AU - Noyes, R. W.
AU - Lázár, J.
AU - Papp, I.
AU - Sári, P.
N1 - Funding Information:
Development of the HATSouth project was funded by NSF MRI grant NSF/AST-0723074, operations have been supported by NASA grants NNX09AB29G and NNX12AH91H, and follow-up observations received partial support from grant NSF/AST-1108686. K.P. acknowledges support from NASA grants NNX13AQ62G and NNG14FC03C. G.B. acknowledges support from the David and Lucile Packard Foundation, from NASA grants NNX13AJ15G, NNX14AF87G, and NNX13AQ62G. J.H. acknowledges support from NASA grants NNX13AJ15G and NNX14AF87G. R.B. and N.E. are supported by CONICYT-PCHA/Doctorado Nacional. A.J. acknowledges support from FONDECYT project 1130857, BASAL CATA PFB-06, and from the Ministry of Economy, Development, and Tourism's Millenium Science Initiative through grant IC120009, awarded to the Millenium Institute of Astrophysics, MAS. R.B. and N.E. acknowledge additional support from the Ministry of Economy, Development, and Tourism's Millenium Science Initiative through grant IC120009, awarded to the Millenium Institute of Astrophysics, MAS. V.S. acknowledges support from BASAL CATA PFB- 06. This paper uses observations obtained with facilities of the Las Cumbres Observatory Global Telescope. Work at the Australian National University is supported by ARC Laureate Fellowship Grant FL0992131. We acknowledge the use of the AAVSO Photometric All-Sky Survey (APASS), funded by the Robert Martin Ayers Sciences Fund, and the SIMBAD database, operated at CDS, Strasbourg, France. Operations at the MPG 2.2 m Telescope are jointly performed by the Max Planck Gesellschaft and the European Southern Observatory. G.B. wishes to thank the warm hospitality of Adele and Joachim Cranz at the farm Isabis, supporting the operations and service missions of HATSouth.
Publisher Copyright:
© 2016. The American Astronomical Society. All rights reserved.
PY - 2016/11
Y1 - 2016/11
N2 - We report the discovery by the HATSouth network of HATS-18b: a 1.980 ± 0.077 MJ, - 1.337-0.049 +0.102 RJ planet in a 0.8378 day orbit, around a solar analog star (mass 1.037 ± 0.047 M⊙ and radius - 1.020-0.031 +0.057 R⊙) with V=14.067±0.040 mag. The high planet mass, combined with its short orbital period, implies strong tidal coupling between the planetary orbit and the star. In fact, given its inferred age, HATS-18 shows evidence of significant tidal spin up, which together with WASP-19 (a very similar system) allows us to constrain the tidal quality factor for Sun-like stars to be in the range of 6.5≲log10(Q∗/k2)≲7 even after allowing for extremely pessimistic model uncertainties. In addition, the HATS-18 system is among the best systems (and often the best system) for testing a multitude of star-planet interactions, be they gravitational, magnetic, or radiative, as well as planet formation and migration theories.
AB - We report the discovery by the HATSouth network of HATS-18b: a 1.980 ± 0.077 MJ, - 1.337-0.049 +0.102 RJ planet in a 0.8378 day orbit, around a solar analog star (mass 1.037 ± 0.047 M⊙ and radius - 1.020-0.031 +0.057 R⊙) with V=14.067±0.040 mag. The high planet mass, combined with its short orbital period, implies strong tidal coupling between the planetary orbit and the star. In fact, given its inferred age, HATS-18 shows evidence of significant tidal spin up, which together with WASP-19 (a very similar system) allows us to constrain the tidal quality factor for Sun-like stars to be in the range of 6.5≲log10(Q∗/k2)≲7 even after allowing for extremely pessimistic model uncertainties. In addition, the HATS-18 system is among the best systems (and often the best system) for testing a multitude of star-planet interactions, be they gravitational, magnetic, or radiative, as well as planet formation and migration theories.
KW - planetary systems
KW - planets and satellites: detection
KW - planets and satellites: gaseous planets
KW - stars: individual (HATS-18)
KW - stars: rotation
KW - techniques: photometric
UR - http://www.scopus.com/inward/record.url?scp=84994545699&partnerID=8YFLogxK
U2 - 10.3847/0004-6256/152/5/127
DO - 10.3847/0004-6256/152/5/127
M3 - Article
AN - SCOPUS:84994545699
SN - 0004-6256
VL - 152
JO - Astronomical Journal
JF - Astronomical Journal
IS - 5
M1 - 127
ER -