The Changing Face of the Extrasolar Giant Planet HD 209458b
نویسندگان
چکیده
منابع مشابه
CHANGING FACE OF THE EXTRASOLAR GIANT PLANET, HD 209458b
High-resolution atmospheric flow simulations of the tidally-locked extrasolar giant planet, HD209458b, show large-scale spatio-temporal variability. This is in contrast to the simple, permanent day/night (i.e., hot/cold) picture. The planet’s global circulation is characterized by a polar vortex in motion around each pole and a banded structure corresponding to ∼3 broad zonal (east-west) jets. ...
متن کاملSYSTEM PARAMETERS OF THE TRANSITING EXTRASOLAR PLANET HD 209458b
We derive improved system parameters for the HD 209458 system using a model that simultaneously fits both photometric transit and radial velocity observations. The photometry consists of previous Hubble Space Telescope STIS and FGS observations, 12 I-band transits observed between 2001 and 2003 with the Mount Laguna Observatory 1 m telescope, and six Strömgren bþ y transits observed between 200...
متن کاملChanging Face of the Extrasolar Giant Planet, Hd 209458 B 3.1. Atmospheric Flow
High-resolution simulations of atmospheric flow on the tidally-locked extrasolar giant planet, HD 209458 b, show large-scale spatio-temporal variability—in contrast to the simple, permanent day/night (hot/cold) picture. The planet's global circulation is characterized by a polar vortex in motion around each pole and a banded structure corresponding to ∼3 broad, zonal (east-west) jets. For very ...
متن کامل3.8-Micron Photometry During the Secondary Eclipse of the Extrasolar Planet HD 209458b
We report infrared photometry of the extrasolar planet HD209458b during the time of secondary eclipse (planet passing behind the star). Observations were acquired during two secondary eclipses at the NASA Infrared Telescope Facility (IRTF) in September 2003. We used a circular variable filter (1.5% bandpass) centered at 3.8 μm to isolate the predicted flux peak of the planet at this wavelength....
متن کاملA Search for Hα Absorption in the Exosphere of the Transiting Extrasolar Planet HD 209458b
There is evidence that the transiting planet HD 209458b has a large exosphere of neutral hydrogen, based on a 15% decrement in Lyman-α flux that was observed by Vidal-Madjar et al. during transits. Here we report upper limits on Balmer-α (Hα) absorption by the exosphere. The results are based on optical spectra of the parent star obtained with the Subaru High Dispersion Spectrograph. Comparison...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2003
ISSN: 0004-637X,1538-4357
DOI: 10.1086/375016