SIMBAD references

2019AJ....157...31Z - Astron. J., 157, 31-31 (2019/January-0)

HATS-70b: a 13 MJ brown dwarf transiting an A star.

ZHOU G., BAKOS G.A., BAYLISS D., BENTO J., BHATTI W., BRAHM R., CSUBRY Z., ESPINOZA N., HARTMAN J.D., HENNING T., JORDAN A., MANCINI L., PENEV K., RABUS M., SARKIS P., SUC V., DE VAL-BORRO M., RODRIGUEZ J.E., OSIP D., KEDZIORA-CHUDCZER L., BAILEY J., TINNEY C.G., DURKAN S., LAZAR J., PAPP I. and SARI P.

Abstract (from CDS):

We report the discovery of HATS-70b, a transiting brown dwarf at the deuterium burning limit. HATS-70b has a mass of Mp=12.9–1.6+1.8MJup and a radius of Rp=1.384–0.074+0.079RJup, residing in a close-in orbit with a period of 1.89 days. The host star is a M*=1.78±0.12M A star rotating at vsinI*=40.61–0.35+0.32kms–1, enabling us to characterize the spectroscopic transit of the brown dwarf via Doppler tomography. We find that HATS-70b, like other massive planets and brown dwarfs previously sampled, orbits in a low projected-obliquity orbit with λ=8.9–4.5^+5.6○^. The low obliquities of these systems is surprising given all brown dwarf and massive planets with obliquities measured orbit stars hotter than the Kraft break. This trend is tentatively inconsistent with dynamically chaotic migration for systems with massive companions, though the stronger tidal influence of these companions makes it difficult to draw conclusions on the primordial obliquity distribution of this population. We also introduce a modeling scheme for planets around rapidly rotating stars, accounting for the influence of gravity darkening on the derived stellar and planetary parameters.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): stars: individual: HATS-70 - techniques: spectroscopic - techniques: photometric

VizieR on-line data: <Available at CDS (J/AJ/157/31): table2.dat table4.dat>

Status at CDS:   could be processed
// Tables of objects will be appraised for possible ingestion in SIMBAD.

Simbad objects: 25

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2020.06.05-09:15:52

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