HATS-25b through HATS-30b: a half-dozen new inflated transiting hot jupiters from the HATSouth survey

Espinoza, N. and Bayliss, D. and Hartman, J. D. and Bakos, G. A. and Jordan, A. and Zhou, G. ORCID: https://orcid.org/0000-0002-4891-3517 and Mancini, L. and Brahm, R. and Ciceri, S. and Bhatti, W. and Csubry, Z. and Rabus, M. and Penev, K. and Bento, J. and de Val-Borro, M. and Henning, T. and Schmidt, B. and Suc, V. and Wright, D. J. ORCID: https://orcid.org/0000-0001-7294-5386 and Tinney, C. G. and Tan, T. G. and Noyes, R. (2016) HATS-25b through HATS-30b: a half-dozen new inflated transiting hot jupiters from the HATSouth survey. The Astronomical Journal, 152 (4):108. pp. 1-18. ISSN 0004-6256


We report six new inflated hot Jupiters (HATS-25b through HATS-30b) discovered using the HATSouth global network of automated telescopes. The planets orbit stars with V magnitudes in the range of similar to 12-14 and have masses in the largely populated 0.5M(J)-0.7M(J) region of parameter space but span a wide variety of radii, from 1.17R(J) to 1.75R(J). HATS-25b, HATS-28b, HATS-29b, and HATS-30b are typical inflated hot Jupiters (R-p = 1.17-1.26R(J)) orbiting G-type stars in short period (P = 3.2-4.6 days) orbits. However, HATS-26b (R-p = 1.75R(J), P = 3.3024 days) and HATS-27b (R-p = 1.50R(J), P = 4.6370 days) stand out as highly inflated planets orbiting slightly evolved F stars just after and in the turn-off points, respectively, which are among the least dense hot Jupiters, with densities of 0.153 g cm(-3) and 0.180 g cm(-3), respectively. All the presented exoplanets but HATS-27b are good targets for future atmospheric characterization studies, while HATS-27b is a prime target for Rossiter-McLaughlin monitoring in order to determine its spin-orbit alignment given the brightness (V = 12.8) and stellar rotational velocity (v sin i approximate to 9.3 km s(-1)) of the host star. These discoveries significantly increase the number of inflated hot Jupiters known, contributing to our understanding of the mechanism(s) responsible for hot Jupiter inflation.

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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 Sep 2019 00:18
Last Modified: 27 May 2021 23:22
Uncontrolled Keywords: stars, HATS-25, HATS-26, HATS-27, HATS-28, HATS-29, HATS-30
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
Identification Number or DOI: https://doi.org/10.3847/0004-6256/152/4/108
URI: http://eprints.usq.edu.au/id/eprint/36376

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