HATS-50b through HATS-53b: four transiting hot Jupiters orbiting G-type stars discovered by the HATSouth survey

Henning, Th. and Mancini, L. and Sarkis, P. and Bakos, G. A. and Hartman, J. D. and Bayliss, D. and Bento, J. and Bhatti, W. and Brahm, R. and Ciceri, S. and Csubry, Z. and de Val-Borro, M. and Espinoza, N. and Fulton, B. J. and Howard, A. W. and Isaacson, H. T. and Jordan, A. and Marcy, G. W. and Penev, K. and Rabus, M. and Suc, V. and Tan, T. G. and Tinney, C. G. and Wright, D. J. and Zhou, G. and Durkan, S. and Lazar, J. and Papp, I. and Sari, P. (2018) HATS-50b through HATS-53b: four transiting hot Jupiters orbiting G-type stars discovered by the HATSouth survey. The Astronomical Journal, 155 (2 - Article 79). pp. 1-20. ISSN 0004-6256

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Abstract

We report the discovery of four close-in transiting exoplanets (HATS-50b through HATS-53b), discovered using the HATSouth three-continent network of homogeneous and automated telescopes. These new exoplanets belong to the class of hot Jupiters and orbit G-type dwarf stars, with brightness in the range V = 12.5-14.0 mag. While HATS-53 has many physical characteristics similar to the Sun, the other three stars appear to be metal-rich ([Fe/H]= 0.2-0.3), larger, and more massive. Three of the new exoplanets, namely HATS-50b, HATS-51b, and HATS-53b, have low density (HATS-50b: 0.39 +/- 0.10 M-J, 1.130 +/- 0.075 R-J; HATS-51b: 0.768 +/- 0.045 M-J, 1.41 +/- 0.19 R-J; HATS-53b: 0.595 +/- 0.089 M-J, 1.340 +/- 0.056 R-J) and similar orbital periods (3.8297 days, 3.3489 days, 3.8538 days, respectively). Instead, HATS-52b is more dense (mass 2.24. +/- 0.15 M-J and radius 1.382 +/- 0.086 R-J) and has a shorter orbital period (1.3667 days). It also receives an intensive radiation from its parent star and, consequently, presents a high equilibrium temperature (T-eq = 1834 +/- 73 K). HATS-50 shows a marginal additional transit feature consistent with an ultra-short-period hot super Neptune (upper mass limit 0.16 M-J), which will be able to be confirmed with TESS photometry.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Published version deposited in accordance with the copyright policy of the publisher.
Faculty/School / Institute/Centre: No Faculty
Faculty/School / Institute/Centre: No Faculty
Date Deposited: 09 Sep 2019 02:00
Last Modified: 10 Sep 2019 04:07
Uncontrolled Keywords: stars, HATS-50, HATS-51, HATS-52, HATS-53, techniques, photometric
Fields of Research : 02 Physical Sciences > 0201 Astronomical and Space Sciences > 020110 Stellar Astronomy and Planetary Systems
Identification Number or DOI: 10.3847/1538-3881/aaa254
URI: http://eprints.usq.edu.au/id/eprint/36378

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