Vertical Distribution of the 1.27 µm O2 Airglow from the Limb VIRTIS-M VEX Observations

Details Vertical Distribution of the 1.27 µm O2 Airglow from the Limb VIRTIS-M VEX Observations Vertical Distribution of the 1.27 µm O2 Airglow from the Limb VIRTIS-M VEX Observations

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007dps....39.4507z&link_type=abstract

American Astronomical Society, DPS meeting #39, #45.07; Bulletin of the American Astronomical Society, Vol. 39, p.503

Astronomy and Astrophysics

Astronomy

1

Scientific paper

We present the results of limb observations of the oxygen night airglow with imaging spectrometer VIRTIS on Venus Express in the NIR spectral range. Vertical profiles of the 1.27 and 1.58 µm O2 emission were obtained. Coincidence of vertical profiles of the 1.27 and 1.58 µm O2 emissions and pretty stable ratio between them (the intensity of the 1.58 µm emission is of 1.2 % of the emission at 1.27 µm) indicates to the same processes of their formation. The two maxima in the O2 emission vertical profile were discovered. One of them (at 97± 1 km) is predicted by models. The second peak appears at higher altitudes at 104 -110 km. Absolute and relative intensities of both peaks are variable. The second peak does not always observed and its intensity is lower in most cases, although there are few cases, when the intensity of the upper peak is higher. The nature of the second maximum is not so clear: it is possible that some processes of the O2 (a1Δg) production like 3-body and catalytic ones may be very effective at different levels in the atmosphere. The vertical profiles of the O2 emission were obtained at different latitudes of the northern hemisphere around midnight and at evening terminator. The emission rate near midnight is observed up to 1.5 MR. The abundance of the O atoms, participating in production of the exited O2 and consequently airglow was found to vary in the regions of maxima by more than an order of magnitude from 2e10 cm-3 on the terminator up to 2.5e11 cm-3 near midnight.

Affiliated with

Also associated with

No associations

Rating

Vertical Distribution of the 1.27 µm O2 Airglow from the Limb VIRTIS-M VEX Observations does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Vertical Distribution of the 1.27 µm O2 Airglow from the Limb VIRTIS-M VEX Observations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Vertical Distribution of the 1.27 µm O2 Airglow from the Limb VIRTIS-M VEX Observations will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1066720