An I-GALFA Study of Supernova Remnant G54.4-0.3 (HC40)

Details An I-GALFA Study of Supernova Remnant G54.4-0.3 (HC40) An I-GALFA Study of Supernova Remnant G54.4-0.3 (HC40)

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21545409a&link_type=abstract

American Astronomical Society, AAS Meeting #215, #454.09; Bulletin of the American Astronomical Society, Vol. 42, p.469

Astronomy and Astrophysics

Astronomy

Scientific paper

The interaction of supernova remnant G54.4-0.3 (HC 40) with the interstellar medium was studied using H I 21-cm emission data obtained from the Inner Galactic ALFA (I-GALFA) Survey using the Arecibo 305-meter telescope. High resolution Arecibo H I observations (3.35’ beamwidth) show the evidence of a well-defined, rapidly expanding, H I shell at a high velocity range of 75 to 129 km sec -1 evolving through the inhomogeneous interstellar medium. We estimated physical parameters to describe the HI shell. The observed mass is 200±100 solar units, the expansion velocity is 94 km sec-1, the observed kinetic energy is 1.74 ± 0.87 x 1049 ergs, and the age is 6.1 x 104 years, assuming a distance of 3.3 kpc.

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