A study of the interstellar medium in line to NGC 5128 from high resolution observations of the supernova 1986G

Details A study of the interstellar medium in line to NGC 5128 from high resolution observations of the supernova 1986G A study of the interstellar medium in line to NGC 5128 from high resolution observations of the supernova 1986G

May 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...215...21d&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 215, no. 1, May 1989, p. 21-32.

Astronomy and Astrophysics

Astrophysics

41

Interstellar Matter, Magellanic Clouds, Molecular Clouds, Stellar Spectra, Supernovae, Absorption Spectra, Line Of Sight, Line Spectra, Milky Way Galaxy, Molecular Absorption

Scientific paper

Interstellar absorption on the line of sight to SN 1986G in NGC 5128 is investigated on the basis of high-resolution high-S/N observations obtained with the Caspec echelle spectrograph at the f/8 Cassegrain focus of the 3.6-m telescope at ESO on May 7-11, 1986. The data are presented in extensive tables and graphs and characterized in detail. Evidence is found for a warped disk or ring of cool gas, spread over a velocity range of about 178 km/sec and with 12 or more distinct clouds absorbing Ca II and Na I; three of the seven components have Ca(+)/Na(0) column-density ratios less than 1. Also detected are two absorption components with vH of 236 and 257 km/sec (possibly associated with high-velocity H I clouds), diffuse interstellar bands at both Galactic and NGC 5128 velocities, and optical CH and CH(+) absorption lines.

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