The authors thank SAO/NASA ADS Astronomy Abstract Service for their deposit authorization. The original publication is available at www.springerlink.com.
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INTERSTELLAR MATTER; MAGELLANIC CLOUDS; MOLECULAR CLOUDS; STELLAR SPECTRA; SUPERNOVAE; ABSORPTION SPECTRA; LINE OF SIGHT; LINE SPECTRA; MILKY WAY GALAXY; MOLECULAR ABSORPTION
Abstract :
[en] 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.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
D'Odorico, S.; European Southern Observatory, Garching, Federal Republic of Germany
di Serego Alighieri, S.; European Southern Observatory, Garching, Federal Republic of Germany
Pettini, M.; ESA, Space Telescope European Coordinating Facility, Garching, Federal Republic of Germany
Magain, Pierre ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image
Nissen, P. E.; Aarhus Universitet, Denmark
Panagia, N.
Language :
English
Title :
A study of the interstellar medium in line to NGC 5128 from high resolution observations of the supernova 1986G
