Ultraviolet observations of interstellar absorption lines toward SN 1987A

Details Ultraviolet observations of interstellar absorption lines toward SN 1987A Ultraviolet observations of interstellar absorption lines toward SN 1987A

Oct 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...345..393s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 345, Oct. 1, 1989, p. 393-411.

Astronomy and Astrophysics

Astronomy

38

Absorption Spectra, Interstellar Radiation, Line Spectra, Supernova 1987A, Ultraviolet Astronomy, High Resolution, Iue, Magellanic Clouds, Milky Way Galaxy

Scientific paper

High-dispersion IUE echelle spectra of SN 1987A were averaged in order to obtain UV absorption-line profiles of the highest possible quality in the direction of SN 1987A. The profiles for Si IV and C IV are quite similar and have much less structure than the Al III profile. On relating column densities, while the C IV and Si IV ratio is relatively constant over the 0-100 km/s velocity range, the C IV to Al III and Si IV to Al III ratios vary by nearly a factor of 10. This suggests that the C IV and Si IV along this sight line in the Galaxy and its halo may have a common origin which differs from that for Al III.

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