Spectroscopy and interferometry of four emission nebulae

Details Spectroscopy and interferometry of four emission nebulae Spectroscopy and interferometry of four emission nebulae

Feb 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976sva....19..416l&link_type=abstract

(Astronomicheskii Zhurnal, vol. 52, July-Aug. 1975, p. 682-691.) Soviet Astronomy, vol. 19, no. 4, 1976, p. 416-421. Translatio

Astronomy and Astrophysics

Astronomy

4

Nebulae, Radio Sources (Astronomy), Spectral Emission, Supernova Remnants, Brightness Temperature, Electron Energy, Interferometry, Radial Velocity

Scientific paper

Results are presented for spectrophotometric and interferometric observations of four emission nebulae: (1) a bright compact nebula of unknown nature identified with the nonthermal radio source G 6.4-0.5 in the region W28, (2) RCW 171, identified with the radio source G 23.1+0.6, (3) Simeiz 34 (Sharpless 261), and (4) the extended complex of bright emission filaments in Cygnus that is partially projected on to the possible supernova remnant W63. The electron densities and temperatures are estimated, and the mean radial velocities are determined together with the parameters of internal motions within the nebulae. It is shown that the nebula in W28 is localized in the outer part of a supernova remnant and that the filamentary complex in Cygnus may be a superposition of a supernova remnant on an H II region.

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