Diameters and Positions of Three Sources of 18-cm OH Emission

Observations of Oh Radio Emission Sources

“…Since its discovery, referred to in Sec. I-B, this OH emission from W49 has been studied with a single antenna by many workers including Zuckerman (1967), Weaver, et al (1968), and Ball and Meeks (1968), and with an OH interferometer by ), Cudaback, et al (1966, Davies, et al (1967), Moran, et al (1968), and by Raimond and Eliasson (1969). The Z n ,., .1 = l/2 line of excited OH was detected from this source by Zuckerman, et al (1968).…”

“…Excited hydrogen lines have been observed in this region by Mezger and Hoglund (1967), Dieter (1967), and Reifenstein (1968). The OH emission from this region has been observed with a single antenna by Weaver, et al (1965), Weinreb, et al (1965), Dieter, et al (1966b, Barrett and Rogers (1966), Davies, et al (1966), Meeks, et al (1966), Weaver, et al (1968, , and with an OH interferometer by , Cudaback, et al (1966), Davies, et al (1967), Moran, et al (1967), Moran, et al (1968), and by Raimond and Eliasson (1969). The 7r / J = l/2 line of excited OH has been detected from this source by Zuckerman, et al (1968), the ir,/,, J = 5/2 line by Yen, et al (1969), and the * i / 2 , J = 5 / 2 line b y p -Schwartz (1969, private communication).…”

The 4830 MHz Formaldehyde Line Observations of Dark Clouds in IC 1795 (W3)

“…IC 1795 is the youngest object of the group of three H n regions in the Perseus arm, the others being IC 1805 (W4) and IC 1848 (W5). It has OH and H 2 CO emission sources 17' southeast of the main radio continuum source (Cudaback et al, 1966;Rogers et al, 1966;Knowles et al, 1969) and large extinction in front of, as well as in, areas surrounding the main radio source. Lynds (1962) lists 13 dark clouds subtending from 0.016 to 0.2 sq deg in the vicinity of IC 1795.…”