THE GROUND-BASEDH-,K-, ANDL-BAND ABSOLUTE EMISSION SPECTRA OF HD 209458b
نویسندگان
چکیده
منابع مشابه
The 3.6− 8.0 μm Broadband Emission Spectrum of HD 209458b: Evidence for an Atmospheric Temperature Inversion
We estimate the strength of the bandpass-integrated thermal emission from the extrasolar planet HD 209458b at 3.6, 4.5, 5.8, and 8.0 μm using the Infrared Array Camera (IRAC) on the Spitzer Space Telescope. We observe a single secondary eclipse simultaneously in all four bandpasses and find relative eclipse depths of 0.00094 ± 0.00009, 0.00213 ± 0.00015, 0.00301 ± 0.00043, and 0.00240 ± 0.00026...
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Atomic hydrogen loss at the top of HD 209458b’s atmosphere has been recently suggested (Vidal-Madjar et al.). We have developed a one-dimensional model to study the chemistry in the upper atmosphere of this extrasolar “hot Jupiter.” The three most abundant elements (other than He) as well as four parent molecules are included in this model, viz., H, C, O, H2, CO, H2O, and CH4. The higher temper...
متن کاملTheoretical Spectral Models of the Planet Hd 209458b with a Thermal Inversion and Water Emission Bands
We find that a theoretical fit to all the HD 209458b data at secondary eclipse requires that the dayside atmosphere of HD 209458b have a thermal inversion and a stratosphere. This inversion is caused by the capture of optical stellar flux by an absorber of uncertain origin that resides at altitude. One consequence of stratospheric heating and temperature inversion is the flipping of water absor...
متن کاملTHE MID-INFRARED SPECTRUM OF THE TRANSITING EXOPLANET HD 209458b
We report the spectroscopic detection of mid-infrared emission from the transiting exoplanet HD 209458b. Using archive data taken with the Spitzer IRS instrument, we have determined the spectrum of HD 209458b between 7.46 and 15.25 m. We have used two independent methods to determine the planet spectrum, one differential in wavelength and one absolute, and find the results are in good agreement...
متن کاملDynamic Meteorology at the Photosphere of Hd 209458b
We calculate the meteorology of the close-in transiting extrasolar planet HD 209458b using a global, threedimensional 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 ...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2014
ISSN: 1538-4357
DOI: 10.1088/0004-637x/796/1/48