Abstract
The centimeter wavelength continuum radiation seen toward the Galactic center (Figure 1) is a mixture of thermal (free-free) and nonthermal (synchrotron) radiation which originates in the nucleus and along the line-of-sight. In this review we discuss only the thermal emission (also see Mezger 1974 and Oort 1977). High-frequency radio continuum and recombination line observations show that the thermal radiation comes from extend, low-density (ELD) HII, and a number of giant “radio HII regions” (see Mezger 1978 for definitions). The approximate half-power contour of the ELD HII (labelled EI in Fig. 1), probably represents a superposition of evolved and expanded HII regions. Thermal radiation outside EI comes predominantly from along the line-of-sight (see Pauls and Mezger 1975).
Publisher
Cambridge University Press (CUP)
Reference36 articles.
1. Infrared observations of the galactic center. II - Forbidden NE II emission
2. Smith L. F. , Biermann P. , and Mezger P. G. : 1978, Astron. Astrophys. in press.
3. Schmidt J. : 1978b, in preparation.
4. Schmidt J. : 1978a, dissertation, University of Bonn.
Cited by
11 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献