HATS-47b, HATS-48Ab, HATS-49b, and HATS-72b: Four Warm Giant Planets Transiting K Dwarfs

Hartman, J. D. and Jordan, Andres and Bayliss, D. and Bakos, G. A. and Bento, J. and Bhatti, W. and Brahm, R. and Csubry, Z. and Espinoza, N. and Henning, Th. and Mancini, L. and Penev, K. and Rabus, M. and Sarkis, P. and Suc, V. and de Val-Borro, M. and Zhou, G. ORCID: https://orcid.org/0000-0002-4891-3517 and Crane, J. D. and Shectman, S. and Teske, J. K. and Wang, S. X. and Butler, R. P. and Lazar, J. and Papp, I. and Sari, P. and Anderson, D. R. and Hellier, C. and West, R. G. and Barkaoui, K. and Pozuelos, F. J. and Jehin, E. and Gillon, M. and Nielsen, L. and Lendl, M. and Udry, S. and Ricker, George R. and Vanderspek, Roland and Latham, David W. and Seager, S. and Winn, Joshua N. and Christiansen, Jessie and Crossfield, Ian J. M. and Henze, Christopher E. and Jenkins, Jon M. and Smith, Jeffrey C. and Ting, Eric B. (2020) HATS-47b, HATS-48Ab, HATS-49b, and HATS-72b: Four Warm Giant Planets Transiting K Dwarfs. The Astronomical Journal, 159 (4):173. pp. 1-23. ISSN 0004-6256

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We report the discovery of four transiting giant planets around K dwarfs. The planets HATS-47b, HATS-48Ab, HATS- 49b, and HATS-72b have masses of 0.369-0.021+0.031MJ, 0.243-0.030+0.022 MJ, 0.353-0.027+0.038 MJ, and 0.1254 ± 0.0039 MJ, respectively, and radii of 1.117 ± 0.014 RJ, 0.800 ± 0.015 RJ, 0.765 ± 0.013 RJ, and 0.7224 ± 0.0032 RJ, respectively. The planets orbit close to their host stars with orbital periods of 3.9228 days, 3.1317 days, 4.1480 days, and 7.3279 days, respectively. The hosts are main-sequence K dwarfs with masses of 0.674-0.012+0.016 M⊙, 0.7279 ± 0.0066 M⊙, 0.7133 ± 0.0075 M⊙, and 0.7311 ± 0.0028, and with V-band magnitudes of V = 14.829 ± 0.010, 14.35 ± 0.11, 14.998 ± 0.040 and 12.469 ± 0.010. The super-Neptune HATS-72b (a.k.a. WASP-191b and TOI 294.01) was independently identified as a transiting planet candidate by the HATSouth, WASP, and TESS surveys, and we present a combined analysis of all of the data gathered by each of these projects (and their follow-up programs). An exceptionally precise mass is measured for HATS-72b thanks to high-precision radial velocity (RV) measurements obtained with VLT/ESPRESSO, FEROS, HARPS, and Magellan/PFS. We also incorporate TESS observations of the warm Saturn-hosting systems HATS-47 (a.k.a. TOI 1073.01), HATS-48A, and HATS-49. HATS-47 was independently identified as a candidate by the TESS team, while the other two systems were not previously identified from the TESS data. The RV orbital variations are measured for these systems using Magellan/PFS. HATS-48A has a resolved 5′.4 neighbor in Gaia DR2, which is a common-proper-motion binary star companion to HATS-48A with a mass of 0.22 M⊙ and a current projected physical separation of ∼1400 au.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: No Faculty
Faculty/School / Institute/Centre: No Faculty
Date Deposited: 09 Feb 2022 06:33
Last Modified: 14 Feb 2022 02:17
Uncontrolled Keywords: Exoplanets; Extrasolar gas giants; Hot Jupiters; Transits; Astrophysics - Earth and Planetary Astrophysics
Fields of Research (2008): 02 Physical Sciences > 0201 Astronomical and Space Sciences > 020110 Stellar Astronomy and Planetary Systems
Fields of Research (2020): 51 PHYSICAL SCIENCES > 5101 Astronomical sciences > 510109 Stellar astronomy and planetary systems
Socio-Economic Objectives (2008): E Expanding Knowledge > 97 Expanding Knowledge > 970102 Expanding Knowledge in the Physical Sciences
Socio-Economic Objectives (2020): 28 EXPANDING KNOWLEDGE > 2801 Expanding knowledge > 280120 Expanding knowledge in the physical sciences
Identification Number or DOI: https://doi.org/10.3847/1538-3881/ab7821
URI: http://eprints.usq.edu.au/id/eprint/44992

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