Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...291..425v&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 291, no. 2, p. 425-438
Astronomy and Astrophysics
Astrophysics
18
Intergalactic Media, Interstellar Gas, Milky Way Galaxy, Molecular Clouds, Supernovae, Galactic Halos, Line Spectra
Scientific paper
We present a study of the interstellar and intergalactic clouds located in the direction of the recent supernova 1993J in M81 based on the analysis of optical and 21 cm spectra obtained during the first nights after its discovery. The optical spectra were taken at high spectral resolution (FWHM 4 to 6 km/s) using the 4.2 m William Herschel Telescope (La Palma, Spain), covering the resonance lines of CN, Ca II, Ca I, CH(+), CH, Na I, Li I and K I. We also observed in Ca II a sample of foreground Galactic stars in the field of the supernova. The 21 cm spectra were taken with the 100 m Effelsberg Radiotelescope (beam FWHM approximately equals 9 min) at the position of SN 1993J and in 6 positions around the supernova, at 10 min separation.
Centurion Martin
de Boer Klaas. S.
King David L.
Lipman Keith
Stegert S. W. J.
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