TY - JOUR
T1 - WASP-19b: The Shortest Period Transiting Exoplanet Yet Discovered
AU - Hebb, L.
AU - Collier-Cameron, A.
AU - Triaud, A.~H.~M.~J.
AU - Lister, T.~A.
AU - Smalley, B.
AU - Maxted, P.~F.~L.
AU - Hellier, C.
AU - Anderson, D.~R.
AU - Pollacco, D.
AU - Gillon, M.
AU - Queloz, D.
AU - West, R.~G.
AU - Bentley, S.
AU - Enoch, B.
AU - Haswell, C.~A.
AU - Horne, K.
AU - Mayor, M.
AU - Pepe, F.
AU - Segransan, D.
AU - Skillen, I.
AU - Udry, S.
AU - Wheatley, P.~J.
PY - 2010/1/1
Y1 - 2010/1/1
N2 - We report on the discovery of a new extremely short period transiting extrasolar planet, WASP-19b. The planet has mass M $_pl$ = 1.15 plusmn 0.08 M$_J$ , radius R $_pl$ = 1.31 plusmn 0.06 R$_J$ , and orbital period P = 0.7888399 plusmn 0.0000008 days. Through spectroscopic analysis, we determine the host star to be a slightly super-solar metallicity ([M/H] = 0.1 plusmn 0.1 dex) G-dwarf with T $_eff$ = 5500 plusmn 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 plusmn 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.
AB - We report on the discovery of a new extremely short period transiting extrasolar planet, WASP-19b. The planet has mass M $_pl$ = 1.15 plusmn 0.08 M$_J$ , radius R $_pl$ = 1.31 plusmn 0.06 R$_J$ , and orbital period P = 0.7888399 plusmn 0.0000008 days. Through spectroscopic analysis, we determine the host star to be a slightly super-solar metallicity ([M/H] = 0.1 plusmn 0.1 dex) G-dwarf with T $_eff$ = 5500 plusmn 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 plusmn 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.
KW - planetary systems, techniques: photometric, techniques: radial velocities
U2 - 10.1088/0004-637X/708/1/224
DO - 10.1088/0004-637X/708/1/224
M3 - Article
SN - 0004-637X
VL - 708
SP - 224
EP - 231
JO - The Astrophysical Journal
JF - The Astrophysical Journal
ER -