Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21542322h&link_type=abstract
American Astronomical Society, AAS Meeting #215, #423.22; Bulletin of the American Astronomical Society, Vol. 42, p.330
Astronomy and Astrophysics
Astronomy
Scientific paper
We report on the discovery of a new extremely short period transiting extra-solar planet, WASP-19b. The planet has mass, Mpl=1.15 +- 0.08 MJ, radius, Rpl=1.31 +- 0.06 RJ, 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 Teff=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 Prot=10.5 +- 0.2 days. The relatively short stellar rotation period suggests that either WASP-19 is somewhat young ( 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, Qs', if a more precise age is determined.
Anderson David R.
Bentley Samuel
Collier-Cameron Andrew
Enoch B.
Gillon Michael
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