WASP-19b : the shortest period transiting exoplanet yet discovered
. (2010) WASP-19b : the shortest period transiting exoplanet yet discovered. Astrophysical Journal, Vol.708 (No.1). pp. 224-231. ISSN 0004-637X Full text not available from this repository.
Official URL: http://dx.doi.org/10.1088/0004-637X/708/1/224
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 > Physics|
|Journal or Publication Title:||Astrophysical Journal|
|Official Date:||1 January 2010|
|Number of Pages:||8|
|Page Range:||pp. 224-231|
|Access rights to Published version:||Restricted or Subscription Access|
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