Heating Associated with the Venus 1.27-μm O2 Airglow

Details Heating Associated with the Venus 1.27-μm O2 Airglow Heating Associated with the Venus 1.27-μm O2 Airglow

Sep 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006dps....38.2609o&link_type=abstract

American Astronomical Society, DPS meeting #38, #26.09; Bulletin of the American Astronomical Society, Vol. 38, p.526

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Scientific paper

We conducted several ground-based observations of the Venus 1.27-μm O2 airglow. Spectral image cubes were taken with Okayama Astrophysical Observatory/infrared imaging spectrometer (superOASIS) and the Gunma Astronomical Observatory/near-infrared camera during 2002 and 2004. They show 1.27-μm O2 airglow and thermal emission from the lower atmosphere. The brightest airglow features are found at around the anti-solar point, which agrees with previous studies. The NASA's Infrared Telescope Facility/cryogenic echelle spectrograph (CSHELL) was used to acquire high-resolution spatially resolved spectra during December, 2005 and February, 2006. The 0.5” slit provided a spectral resolution of λ/Δλ 40,000. The spectra contain several rotational lines of R-branch of the airglow. The bright patch patterns gradually varied in an hour and entirely changed within a day. Using the temperature dependency of airglow spectra, we derived the rotational temperature distributions on the nightside hemisphere corresponding to each intensity distribution. The temperature shows a positive correlation with the airglow intensity. This result indicates the bright region is hotter than the other regions and supports the existing scenario of the Venus O2 airglow.

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