Physics
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsa13b0277o&link_type=abstract
American Geophysical Union, Fall Meeting 2006, abstract #SA13B-0277
Physics
0310 Airglow And Aurora, 7949 Ionospheric Storms (2441)
Scientific paper
Presented here is an analysis of the terrestrial nightglow content of high spectral resolution and sensitivity astronomical spectra taken during and just after the geomagnetic storm of October/November 2003. The nightglow is extracted from spectra taken with the VLT/UVES instrument on 28 October-1 November, possessing an instrumental spectral resolution (λ/Δλ) of 50,000 and covering various regions between 314--1083 nm, and the Keck/HIRES instrument on 2--3 November, with spectral resolution 34,000 covering the region 630--875 nm. Emission intensities in various systems of the dominant mesospheric species, OH and O2, are compared to their quiescent values derived from equivalent spectra [Hanuschik, 2003, Cosby et al. 2006], and are used to derive rotational temperatures. An emphasis is placed on comparisons involving nightglow emission features arising wholly or at least partially from ionospheric interactions, such as N(2D°--4S°) 520 nm, the O(^1D-3P) 630,636 nm red lines, the O-atom electron radiative recombination Rydberg lines 777,845 nm, O+(2P°--2D°) 732,733 nm, and the O2(b ^1Σ+g-X 3Σ-g) v^'=0,1 "hot" bands. A comparison is made temporally between their intensities and the geomagnetic activity indicator Dst and Kp indices. The results of an examination of these spectra for emission from auroral species N2 and N+2 are also presented. This work is supported by NSF Atmospheric Sciences (Aeronomy) and the NSF Physics Research Experience for Undergraduates program. R. Hanuschik, Astron. Astrophys., 407, 1157--1164 (2003). P.C. Cosby, B.D. Sharpee, T.G. Slanger, D.L. Huestis, and R. Hanuschik, J. Geophys. Res., in press (2006).
O'Neill E. R.
Sharpee Brian D.
Slanger Tom G.
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