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Comment: Accepted for publication by MNRAS
Comment: 18 pages, 3 figures and 2 tables. Final proof version, to appear in The Astrophysical Journal, Vol 511, February 1, 1999
Comment: 4 pages with 11 postscript figures included. To appear in New Astronomy Reviews, as part of proceedings of 2nd Workshop on Galactic Sources with Relativistic Jets. Uses newarcrc.sty (included)
(shortened version) We show that many observations of W44, a supernova remnant in the galactic plane at a distance of about 2500 pc, are remarkably consistent with the simplest realistic model. The model remnant is evolving in a smooth ambient medium of fairly high density, about 6 cm^-3 on average, with a substantial density gradient. At the observed time it has an age of about 20,000 years, consistent with the age of the associated pulsar, and a radius of 11 to 13 pc. Over most of the outer surface, radiative cooling has become important in the post shock gas; on the denser end there has been sufficient compression of the cooled gas to develop a very thin dense half shell of about 450 M_sun, supported against further compression by nonthermal pressure. The half shell has an expansion velocity of about 150 km s^-1, and is bounded ...
Comment: 9 pages, 4 figures in a single ps file
Comment: 10 pages including 1 figure, AASTeX, accepted by ApJ
Comment: 4 pages, 2 figures. To be published in New Astronomy Reviews, as part of proceedings of 2nd workshop on Galactic sources with relativistic jets
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