Engineering topics

Batrla, W.

Publications and source records attributed to Batrla, W..

2 records

NASA NTRS1984

Radioastronomical observations of comets IRAS-Araki-Alcock (1983d) and Sugano-Saigusa-Fujikawa (1983e)

Continuum and spectral-line radio observations of the comets IRAS-Araki-Alcock and Sugano-Saigusa-Fujikawa obtained at a number of observatories during May and June, 1983, are compiled in tables and briefly characterized. The species NH3, H2O, CO, and HCN are considered in detail; visible-range observations of CN are compared; and the implications of the results and the experience gained in performing and coordinating the observations for the detection of important species in other comets, especially Halley's Comet, are explored.

Irvine, W. M.↗

NASA NTRS1981

H I and dust in Kutner's cloud

A map in the 1.420 GHz line of H I, with an angular resolution of 9.1 arcmin, is made toward Kutner's Cloud and the region between Kutner's Cloud and Heiles' Cloud. It is assumed that the cold H I in the clouds is located only in front of, and absorbs the H I background; the column density of cold H I, N(H I), is obtained from this absorption. The visual extinction for this region is determined from star counts on red and blue POSS prints. It is noted that most of the gas in the cloud is in the form of H2. The column density of H2 is obtained from the visual extinction and the extinction-to-gas ratio given by Bohlin et al. (1978).

Batrla, W.↗