Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21334601l&link_type=abstract
American Astronomical Society, AAS Meeting #213, #346.01; Bulletin of the American Astronomical Society, Vol. 41, p.481
Astronomy and Astrophysics
Astronomy
Scientific paper
Eccentric extrasolar planets present a unique opportunity to study the effects of variable heating and non-synchronous rotation on the atmospheric dynamics of hot Jupiters and hot Neptunes. We present three-dimensional atmospheric circulation models that include realistic radiative transfer for three such extrasolar planets: GJ436b (e=0.15), HD17156b (e=0.67), and HD80606b (e=0.93). GJ436b is the smallest transiting extrasolar planet known to date. Because of its size, it is likely to have a composition more similar to Neptune ( 30x Solar), which has an effect on the radiative transfer and hence dynamics of the planet's atmosphere. HD17156b is a fairly massive Jupiter sized planet on a highly elliptical orbit. During its orbit, HD17156b passes through the radiative regime of both pM and pL Class planets as defined by Fortney et al. (2008), which makes it an ideal candidate to test the effects of TiO and VO in the atmospheres of extrasolar planets. HD80606b has the largest eccentricity of the extrasolar planets detected to date. Because of its highly eccentric orbit, HD80606b is flash heated as it passes through the periapse of its orbit, which leads to a significant increase in the thermal gradients that drive winds. We contrast the global circulation patterns and vertical thermal structures of these planets to those of HD189733b and HD209458b and postulate possible observational implications. This work was supported by NASA's Origins and NESSF programs.
Fortney Jonathan J.
Lewis Nikole
Marley Mark S.
Showman Adam P.
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