2013A&A...552A.120S


C.D.S. - SIMBAD4 rel 1.7 - 2019.12.09CET11:04:00

2013A&A...552A.120S - Astronomy and Astrophysics, volume 552A, 120-120 (2013/4-1)

WASP-71b: a bloated hot Jupiter in a 2.9-day, prograde orbit around an evolved F8 star.

SMITH A.M.S., ANDERSON D.R., BOUCHY F., COLLIER CAMERON A., DOYLE A.P., FUMEL A., GILLON M., HEBRARD G., HELLIER C., JEHIN E., LENDL M., MAXTED P.F.L., MOUTOU C., PEPE F., POLLACCO D., QUELOZ D., SANTERNE A., SEGRANSAN D., SMALLEY B., SOUTHWORTH J., TRIAUD A.H.M.J., UDRY S. and WEST R.G.

Abstract (from CDS):

We report the discovery by the WASP transit survey of a highly-irradiated, massive (2.242±0.080MJup planet which transits a bright (V=10.6), evolved F8 star every 2.9-days. The planet, WASP-71b, is larger than Jupiter (1.46±0.13RJup), but less dense (0.71±0.16ρJup). We also report spectroscopic observations made during transit with the CORALIE spectrograph, which allow us to make a highly-significant detection of the Rossiter-McLaughlin effect. We determine the sky-projected angle between the stellar-spin and planetary-orbit axes to be λ=20.1±9.7degrees, i.e. the system is ``aligned'', according to the widely-used alignment criteria that systems are regarded as misaligned only when λ is measured to be greater than 10 degrees with 3-σ confidence. WASP-71, with an effective temperature of 6059±98K, therefore fits the previously observed pattern that only stars hotter than 6250K are host to planets in misaligned orbits. We emphasise, however, that λ is merely the sky-projected obliquity angle; we are unable to determine whether the stellar-spin and planetary-orbit axes are misaligned along the line-of-sight. With a mass of 1.56±0.07M, WASP-71 was previously hotter than 6250K, and therefore might have been significantly misaligned in the past. If so, the planetary orbit has been realigned, presumably through tidal interactions with the cooling star's growing convective zone.

Abstract Copyright:

Journal keyword(s): planetary systems - planets and satellites: detection - planets and satellites: fundamental parameters - stars: individual: WASP-71 - planets and satellites: individual: WASP-71b

VizieR on-line data: <Available at CDS (J/A+A/552/A120): phot.dat>

Simbad objects: 3

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Number of rows : 3

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 WASP-71b Pl 01 57 03.2040575164 +00 45 31.878858095           ~ 13 1
2 WASP-71 * 01 57 03.2040575164 +00 45 31.878858095   11.35 10.56     ~ 19 1
3 CD-23 9677 PM* 11 01 35.8978900078 -23 51 38.384687448   11.05 10.28 10.21 9.66 ~ 37 1

    Equat.    Gal    SGal    Ecl

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2019.12.09-11:04:00

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