An interstellar contribution of NA I D from the arm of M 51 toward the nucleus of NGC 5195

Details An interstellar contribution of NA I D from the arm of M 51 toward the nucleus of NGC 5195 An interstellar contribution of NA I D from the arm of M 51 toward the nucleus of NGC 5195

Jun 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987pasp...99..467v&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 99, June 1987, p. 467-470.

Astronomy and Astrophysics

Astronomy

4

D Lines, Galactic Nuclei, Interstellar Extinction, Interstellar Matter, Sodium, Spiral Galaxies, Cosmic Dust, Visible Spectrum

Scientific paper

The author reports on evidence for interstellar absorption due to the foreground spiral arm of NGC 5194 (M51) in the spectrum of the nucleus of NGC 5195. The presence of such absorption was hinted at by Spinrad (1973) but not confirmed. The Na I D lines in the spectrum are anomalously strong and might be accounted for by interstellar dust in the arm projectd against the nucleus of NGC 5195.

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