[en] We report on four new transiting hot Jupiters discovered by the WASP- South survey. WASP-178b transits a V = 9.9, A1V star with T[SUB]eff[/SUB] = 9350 ± 150 K, the second-hottest transit host known. It has a highly bloated radius of 1.81 ± 0.09 R[SUB]Jup[/SUB], in line with the known correlation between high irradiation and large size. With an estimated temperature of 2470 ± 60 K, the planet is one of the best targets for studying ultrahot Jupiters that is visible from the Southern hemisphere. The three host stars WASP-184, WASP-185, and WASP-192 are all post-main-sequence G0 stars of ages 4-8 Gyr. The larger stellar radii (1.3-1.7 M[SUB]☉[/SUB]) mean that the transits are relatively shallow (0.7-0.9 per cent) even though the planets have moderately inflated radii of 1.2-1.3 R[SUB]Jup[/SUB]. WASP-185b has an eccentric orbit (e = 0.24) and a relatively long orbital period of 9.4 d. A star that is 4.6 arcsec from WASP-185 and 4.4 mag fainter might be physically associated.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Hellier, Coel; Astrophysics Group, Keele University, Staffordshire ST5 5BG, UK
Anderson, D. R.; Astrophysics Group, Keele University, Staffordshire ST5 5BG, UK ; Department of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK
Barkaoui, Khalid ; Oukaimeden Observatory, High Energy Physics and Astrophysics Laboratory, Cadi Ayyad University, Marrakech, Morocco ; Astrobiology Research Unit, Université de Liège, Liège 1, Belgium
Benkhaldoun, Z.; Oukaimeden Observatory, High Energy Physics and Astrophysics Laboratory, Cadi Ayyad University, Marrakech, Morocco
Bouchy, F.; Observatoire astronomique de l'Université de Genève, 51 Chemin des Maillettes, CH-1290 Sauverny, Switzerland
Burdanov, Artem ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Exotic
Cameron, A. Collier; SUPA, School of Physics and Astronomy, University of St. Andrews, North Haugh, Fife KY16 9SS, UK
Delrez, Laetitia ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Exotic
Gillon, Michaël ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Exotic
Jehin, Emmanuel ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Origines Cosmologiques et Astrophysiques (OrCa)
Nielsen, L. D.; Observatoire astronomique de l'Université de Genève, 51 Chemin des Maillettes, CH-1290 Sauverny, Switzerland
Maxted, P. F. L.; Astrophysics Group, Keele University, Staffordshire ST5 5BG, UK
Pepe, F.; Observatoire astronomique de l'Université de Genève, 51 Chemin des Maillettes, CH-1290 Sauverny, Switzerland
Pollacco, D.; Department of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK
Pozuelos Romero, Francisco José ; Astrobiology Research Unit, Université de Liège, Liège 1, Belgium ; Space sciences, Technologies and Astrophysics Research (STAR) Institute, Université de Liège, Liège 1, Belgium
Ségransan, D.; Observatoire astronomique de l'Université de Genève, 51 Chemin des Maillettes, CH-1290 Sauverny, Switzerland
Smalley, B.; Astrophysics Group, Keele University, Staffordshire ST5 5BG, UK
Triaud, A. H. M. J.; School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
Turner, O. D.; Astrophysics Group, Keele University, Staffordshire ST5 5BG, UK ; Observatoire astronomique de l'Université de Genève, 51 Chemin des Maillettes, CH-1290 Sauverny, Switzerland
Udry, S.; Observatoire astronomique de l'Université de Genève, 51 Chemin des Maillettes, CH-1290 Sauverny, Switzerland
West, R. G.; Department of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK)
Anderson D. R. et al., 2018, preprint (1809.04897)
Arcangeli J. et al., 2019, A&A, 625, A136
Bakos G. Á. et al., 2012, AJ, 144, 19
Barkaoui K. et al., 2019, AJ, 157, 43
Bhatti W. et al., 2016, preprint (1607.00322)
Blackwell D. E., Shallis M. J., 1977, MNRAS, 180, 177
Boyajian T. S. et al., 2013, ApJ, 771, 40
Claret A., 2000, A&A, 363, 1081
Collier Cameron A. et al., 2007a, MNRAS, 375, 951
Collier Cameron A. et al., 2007b, MNRAS, 380, 1230
Collier Cameron A. et al., 2010, MNRAS, 407, 507
Delrez L. et al., 2016, MNRAS, 458, 4025
Doyle A. P. et al., 2013, MNRAS, 428, 3164
Doyle A. P., Davies G. R., Smalley B., Chaplin W. J., Elsworth Y., 2014, MNRAS, 444, 3592
Fossati L., Ayres T. R., Haswell C. A., Bohlender D., Kochukhov O., Flöer L., 2013, ApJ, 766, L20
Gaia Collaboration et al., 2016, A&A, 595, A1
Gaia Collaboration et al., 2018, A&A, 616, A1
Gaudi B. S. et al., 2017, Nature, 546, 514
Gillon M. et al., 2013, A&A, 552, A82
Gillon M. et al., 2014, A&A, 562, L3
Hartman J. D. et al., 2016, AJ, 152, 182
Hebb L. et al., 2009, ApJ, 693, 1920
Hellier C. et al., 2009, Nature, 460, 1098
Hellier C. et al., 2019a, MNRAS, 482, 1379
Hellier C. et al., 2019b, MNRAS, 488, 3067
Howard A. W. et al., 2012, ApJ, 749, 134
Kipping D. M. et al., 2011, AJ, 142, 95
Kreidberg L. et al., 2018a, AJ, 156, 17
Kreidberg L., Line M. R., Thorngren D., Morley C. V., Stevenson K. B., 2018b, ApJ, 858, L6
Lendl M. et al., 2012, A&A, 544, A72
Lund M. B. et al., 2017, AJ, 154, 194
Maxted P. F. L. et al., 2011, PASP, 123, 547
Maxted P. F. L., Serenelli A. M., Southworth J., 2015, A&A, 575, A36
Niemczura E., Smalley B., Pych W., 2014, Determination of Atmospheric Parameters of B-, A-, F- and G-Type Stars. Springer International Publishing, Cham, Switzerland
Oberst T. E. et al., 2017, AJ, 153, 97
Owen J. E., Lai D., 2018, MNRAS, 479, 5012
Parmentier V. et al., 2018, A&A, 617, A110
Pepe F., Mayor M., Galland F., Naef D., Queloz D., Santos N. C., Udry S., Burnet M., 2002, A&A, 388, 632
Petrovich C., Tremaine S., 2016, ApJ, 829, 132
Pollacco D. L. et al., 2006, PASP, 118, 1407
Queloz D. et al., 2001, A&A, 379, 279
Queloz D. et al., 2010, A&A, 517, L1
Ricker G. R. et al., 2016, Proc. SPIE, 9904, 99042B
Sestito P., Randich S., 2005, A&A, 442, 615
Sestovic M., Demory B.-O., Queloz D., 2018, A&A, 616, A76
