Kinematic detection of supernova remnants in giant H II regions

Details Kinematic detection of supernova remnants in giant H II regions Kinematic detection of supernova remnants in giant H II regions

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...311...85c&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 311, Dec. 1, 1986, p. 85-97.

Other

35

H Ii Regions, Spiral Galaxies, Supernova Remnants, H Alpha Line, Kinematics, Kinetic Energy, Nonthermal Radiation, Optical Emission Spectroscopy, Radio Spectra, Spectral Line Width

Scientific paper

In a kinematic survey of giant H II regions in M 101, four sources that have large velocity widths at low intensity levels are detected. Two of these large-velocity-width sources (LVWSs) are, within the limit of resolution, coincident with nonthermal radio sources several times as luminous as Cas A. The LVWS in NGC 5471 B is so bright that it is possible to separate its broad profile from the narrower profile of the background H II region. H-alpha CCD photometry, optical spectroscopy, and high-resolution radio data are combined to derive its physical properties, which support Skillman's (1985) identification of the object as a supernova remnant. The other LVWSs might be supernova remnants embedded in giant H II regions, unusually massive wind-driven shells, or the combination of both.

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