(2010) WASP-19b : the shortest period transiting exoplanet yet discovered. Astrophysical Journal, Vol.708 (No.1). pp. 224-231. doi:10.1088/0004-637X/708/1/224 ISSN 0004-637X.

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Abstract

We report on the discovery of a new extremely short period transiting extrasolar planet, WASP-19b. The planet has mass M-pl = 1.15 +/- 0.08 M-J, radius R-pl = 1.31 +/- 0.06 R-J, and orbital period P = 0.7888399 +/- 0.0000008 days. Through spectroscopic analysis, we determine the host star to be a slightly super-solar metallicity ([M/H] = 0.1 +/- 0.1 dex) G-dwarf with T-eff = 5500 +/- 100 K. In addition, we detect periodic, sinusoidal flux variations in the light curve which are used to derive a rotation period for the star of P-rot = 10.5 +/- 0.2 days. The relatively short stellar rotation period suggests that either WASP-19 is somewhat young (similar to 600 Myr old) or tidal interactions between the two bodies have caused the planet to spiral inward over its lifetime resulting in the spin-up of the star. Due to the detection of the rotation period, this system has the potential to place strong constraints on the stellar tidal quality factor, Q(s)('), if a more precise age is determined.

Item Type:	Journal Article
Subjects:	Q Science > QB Astronomy
Divisions:	Faculty of Science, Engineering and Medicine > Science > Physics
Journal or Publication Title:	Astrophysical Journal
Publisher:	IOP Publishing
ISSN:	0004-637X
Official Date:	1 January 2010
Dates:	Date Event 1 January 2010 Published
Volume:	Vol.708
Number:	No.1
Number of Pages:	8
Page Range:	pp. 224-231
DOI:	10.1088/0004-637X/708/1/224
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access

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