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Hebb, L; Collier-Cameron, A; Triaud, A.H.M.J; Lister, T.A; Smalley, B; Maxted, P.F.L; Hellier, C; Anderson, D.R; Pollacco, D; Gillon, M; Queloz, D; West, R.G; Bentley, S; Enoch, B; Haswell, C.A; Horne, K; Mayor, M; Pepe, F; Segransan, D; Skillen, I; Udry, S; Wheatley, P.J
The Astrophysical journal, 01/2010, Letnik: 708, Številka: 1Journal Article, Web Resource
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 MJ, radius R pl = 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 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 (~ 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.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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