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A discussion of the H-alpha filamentary nebulae and galactic structure in the Cygnus regionFrom observation of the galactic structure in Cygnus, the system of filamentary nebulae was found to lie at a distance of roughly 1.5 kpc, in the same region as about half the thermal radio sources in Cygnus X, the supernova remnant near gamma Cygni, and the association Cygnus OB2, in the direction of which the X-ray source Cygnus XR-3 is observed. The source of excitation was probably the pulse of radiation from a supernova explosion, as proposed in the case of Gum nebula. However continuing excitation by early stars in the region of Cygnus X cannot be excluded.
Document ID
Document Type
Conference Paper
Matthews, T. A. (Maryland Univ. College Park, MD, United States)
Simonson, S. C., III (Maryland Univ. College Park, MD, United States)
Date Acquired
August 6, 2013
Publication Date
September 1, 1971
Publication Information
Publication: NASA. Goddard Space Flight Center The Gum Nebula and Related Probl.
Subject Category
Distribution Limits
Work of the US Gov. Public Use Permitted.

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