Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...166...97h&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 166, no. 1-2, Sept. 1986, p. 97-106.
Astronomy and Astrophysics
Astrophysics
27
Continuous Radiation, Galactic Structure, Hydrogen, Neutral Gases, Radio Emission, Star Formation, Astronomical Maps, Flux Density, Magellanic Clouds, Radio Spectra, Very Large Array (Vla)
Scientific paper
The neutral hydrogen emission and radio continuum emission of the Magellanic-type galaxy NGC 55 were observed with the Very Large Array at a resolution of about 40 arcsec. An integrated H I flux of 1600 Jy km/s, corresponding to a total H I mass of 1.5 x 10 to the 9th solar masses is found. The total H I distribution, which is not centered on the bar, shows a warp and looks disturbed on the most western side. The extent of the H I emission is comparable to the optical dimensions. The velocity field shows a large-scale asymmetry with respect to the center of the bar, confirming the mass asymmetry indicated by the optical light distribution. About 80 percent of the total mass resides in the disk while the remaining 20 percent of the mass is in the off-centered component. The centers of the two components are 2.1 kpc apart.
Dettmar Ralf-Juergen
Hummel Evi
Wielebinski Richard
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