Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...130..294c&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 130, no. 2, Jan. 1984, p. 294-300.
Astronomy and Astrophysics
Astronomy
3
Continuous Spectra, H Lines, Supernova Remnants, X Ray Sources, Astronomical Maps, Neutral Gases, Radio Astronomy
Scientific paper
Observations in the radio-continuum and H I emission, at 1420 MHz, in the direction of the soft X-ray source H 1538-32, proposed as a possible supernova remnant by Riegler et al. (1980), are reported. The observational results provide further support to Riegler et al.'s contention. The radio-continuum emission is distributed around H 1538-32 forming an elliptical shell with an equivalent angular radius of 2.6 deg. A number of discrete sources have been detected immersed into the radio shell. The neutral gas associated with H 1538-32 shows the dynamical effects of an expanding shock front interacting with a cloudy surrounding medium. An inter-cloud preshock density of about 0.02/cu cm, an initial energy of about 4 x 10 to the 50th ergs, an age of 20,000 yr, and a distance of about 950 pc have been estimated. The H I features associated to this supernova remnant have no connection with the extended H I ring noticed by Riegler et al.
Colomb Fernando R.
Dubner Gloria M.
Giacani Elsa B.
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