Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...202...35b&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 202, no. 1-2, Aug. 1988, p. 35-40.
Astronomy and Astrophysics
Astrophysics
24
H I Regions, Spiral Galaxies, Star Formation Rate, Active Galactic Nuclei, Brightness Distribution, Far Infrared Radiation, H Alpha Line, Radiant Flux Density, Very Large Array (Vla)
Scientific paper
The authors observed the nearly edge-on early-type spiral galaxy NGC 4594 (M104, the "Sombrero" galaxy) with the Very Large Array and have detected extended emission at 1.49 GHz with a total flux of about 13 mJy. This emission originates in two components, a ring associated with the H I and dust rings, and a spheroidal component with a large z extent. The contribution of the latter to the total flux is twice as much as that of the ring. Comparison with Hα measurements indicates that less than 10% of the disk emission is thermal. The star formation rate derived from Hα and from the radio continuum is rather low (0.8 M_sun;yr-1) which is consistent with the low radio surface brightness and FIR emission. The authors detected linearly polarized emission in a spur that emerges from the active nucleus.
Bajaja Esteban
Dettmar Ralf-Juergen
Hummel Evi
Wielebinski Richard
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