Вращательная температура гидроксильного излучения верхней атмосферы / OH rotational temperature of the atmosphere

Fishkova, L.M. and ფიშკოვა, ლ.მ. and Фишкова, Л.М. (1963) Вращательная температура гидроксильного излучения верхней атмосферы / OH rotational temperature of the atmosphere. აბასთუმნის ასტროფიზიკური ობსერვატორიის ბიულეტენი / Bulletin of the Abastumani Astrophysical Observatory (29). pp. 55-76.


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Spectral observations of airglow in spectral region 5400-7000 A have been made at the Abastumani astrophysical observatory within the period 1958—1960. OH rotational temperature of the upper atmosphere was investigated and T was measured at 106 nights (table I). Mean T for Abastumani is 240 ± 16°K (table II). Seasonal variations of T with maximum in November—December and minimum in summer and amplitude about 75°K were obtained (Fig.4). Mean T values at Abastumani are close to mean T values obtained during the same periods at higher latitudes (table III) and IV). For 250°K the dependence of OH bands intensity on T was observed (fig. 5), the dependence of lg I on i/T being approximately linear and the slope of corresponding straight line giving the activation energy E=2.2+0.8 ccal/mol. This value is close to ectivation energy of (O -H) reaction. For T< 250°K there is no dependence of I on T. this case is closer to (O -H) mechanism of OH molecules exitation. For T <270°K rotational temperature obtained from band (9—3) coincides with that obtained from band (6 — 1), but when T>270°K the latter is less than the former and the difference T(9-3) - T(6-1) reaches in some cases 40°K. The ratio I(9-3)/I(6-1) does not depend on T and it decreased continuously during the period of observations from 2.0 in 1958 to 0.8 in summer 1959 (fig. 8). During great geomagnetic disturbances followed by low-latitudal aurora [(for instance in November 1960), the anomalous increase of T to values>300°K followed by anomalous decrease of OH bands intensity was observed, at the same time the difference T(9-3) -T(6-1) increased to value 20— 40°K and ratio I(9-3)/I(6-1) increased also (fig.9). Similar anomalous phenomena were also observed at some nights in October of each year. It is suggested that seasonal variations of I and T and their anomalous variations during great geomagnetic disturbances are consequence of powerful vibrational motions of the upper atmosphere followed by vertical displacements of emission layers. January. 1962.

Item Type: Article
Subjects: Q Science > QB Astronomy
Divisions: Institutes > Evgeny Kharadze Abastumani National Astrophysical Observatory
Depositing User: თამარ ჭაღიაშვილი
Date Deposited: 11 Jun 2018 10:21
Last Modified: 11 Jun 2018 10:21
URI: http://eprints.iliauni.edu.ge/id/eprint/8143

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