The distribution of neutral hydrogen in the Sombrero galaxy, NGC 4594

Details The distribution of neutral hydrogen in the Sombrero galaxy, NGC 4594 The distribution of neutral hydrogen in the Sombrero galaxy, NGC 4594

Dec 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...141..309b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 141, no. 2, Dec. 1984, p. 309-317. Research supported by the Nederlandse Organ

Astronomy and Astrophysics

Astrophysics

37

Galactic Structure, Gas Density, Hydrogen Clouds, Radio Galaxies, Annuli, Astronomical Maps, Centimeter Waves, Neutral Gases, Spatial Distribution

Scientific paper

Fan beam observations with an E-W resolution of 11arcsec.4 of NGC 4594 in the 21-cm line, made with the Westerbork Synthesis Radio Telescope, are reported. The results are presented in the form of a position-velocity contour map. A model is proposed which reproduces the gross properties of the H I distribution. The relative H I content is very much lower for this galaxy than for other Sa galaxies and is lower than for H I-rich ellipticals. The H I distribution suggests that only gas outside the optical bulge has been able to survive. Mechanisms causing the removal of gas from the spheroid of the galaxy are briefly discussed.

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