Curtis S. Cooper and Adam P. Showman 2005 ApJ 629 L45 doi:10.1086/444354
Curtis S. Cooper1 and Adam P. Showman1
Show affiliationsWe calculate the meteorology of the close-in transiting extrasolar planet HD 209458b using a global, three-dimensional atmospheric circulation model. Dynamics are driven by perpetual irradiation of one hemisphere of this tidally locked planet. The simulation predicts global temperature contrasts of ~500 K at the photosphere and the development of a steady superrotating jet. The jet extends from the equator to midlatitudes and from the top model layer at 1 mbar down to 10 bar at the base of the heated region. Wind velocities near the equator exceed 4 km s-1 at 300 mbar. The hottest regions of the atmosphere are blown downstream from the substellar point by ~60° of longitude. We predict from these results a factor of ~2 ratio between the maximum and minimum observed radiation from the planet over a full orbital period, with peak infrared emission preceding the time of the secondary eclipse by ~14 hr.
atmospheric effects; planets and satellites: general; planets and satellites: individual (HD 209458b); methods: numerical
Issue 1 (2005 August 10)
Received 2005 February 22, accepted for publication 2005 June 28
Published 2005 July 18
Curtis S. Cooper and Adam P. Showman 2005 ApJ 629 L45
C Elsässer et al 1998 J. Phys.: Condens. Matter 10 5081
Xiaobing Fan et al 2006 Phys. Med. Biol. 51 N451
Andrew P. Rasmussen et al. 2007 ApJ 656 129
Eric D. Feigelson et al. 2002 ApJ 574 258
D. Burgess 2006 ApJ 653 316
Lorenzo Iorio 2002 Class. Quantum Grav. 19 L175
Robbie C. Dohm-Palmer et al. 1998 The Astronomical Journal 115 152
J E S Venart 1964 Br. J. Appl. Phys. 15 1409
V Pravda et al 2002 Class. Quantum Grav. 19 6213