Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...280l..15d&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 280, no. 1, p. L15-L18
Astronomy and Astrophysics
Astronomy
18
Absorption Spectra, Galactic Halos, Intergalactic Media, Interstellar Matter, Line Spectra, Supernovae, Ultraviolet Astronomy, Galactic Structure, Iue, Line Of Sight, Radial Velocity
Scientific paper
High resolution IUE spectra of SN 1993J in M81 show the existence of several clouds on the line of sight. These include local galactic gas at 0 km/s, gas in M81 at -130 km/s, a cloud in the halo in of the Milky Way near -45 km/s, and an intergalactic cloud near +140 km/s. Arguments for each of these locations are given. There is little gas in M81 in front of SN 1993J and no detectable CIV at or near -130 km/s. The gas of the halo of the Milky Way shows a large amount of CIV and SiIV. The intergalactic cloud shows a large velocity width extending from +100 km/s to +200 km/s and is very prominent in the absorption lines of AlIII, SiIV, and CIV. It may be related to energetic events in the M81 group galaxies.
Bomans Dominik J.
de Boer Klaas. S.
Fransson Claes
Kirshner Robert P.
Rodriguez Pascual P.
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