SIMBAD references

2016AJ....152..127P - Astron. J., 152, 127-127 (2016/November-0)

HATS-18b: an extreme short-period massive transiting planet spinning up its star.

PENEV K., HARTMAN J.D., BAKOS G.A., CICERI S., BRAHM R., BAYLISS D., BENTO J., JORDAN A., CSUBRY Z., BHATTI W., DE VAL-BORRO M., ESPINOZA N., ZHOU G., MANCINI L., RABUS M., SUC V., HENNING T., SCHMIDT B., NOYES R.W., LAZAR J., PAPP I. and SARI P.

Abstract (from CDS):

We report the discovery by the HATSouth network of HATS-18b: a 1.980±0.077M_J, 1.337_–0.049^+0.102R_J planet in a 0.8378 day orbit, around a solar analog star (mass 1.037±0.047M_☉ and radius 1.020_–0.031^+0.057R_☉) 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\lesssimlog₁₀(Q^*/k₂)\lesssim7 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.

Journal keyword(s): planetary systems - planets and satellites: detection - planets and satellites: gaseous planets - stars: individual: HATS-18 - stars: rotation - techniques: photometric - techniques: photometric

VizieR on-line data: <Available at CDS (J/AJ/152/127): table1.dat table2.dat>

Simbad objects: 19

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