High resolution (C-12)O observations of the central parts of the interacting galaxy NGC 3628

Details High resolution (C-12)O observations of the central parts of the interacting galaxy NGC 3628 High resolution (C-12)O observations of the central parts of the interacting galaxy NGC 3628

Feb 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...173..229b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 173, no. 2, Feb. 1987, p. 229-236.

Astronomy and Astrophysics

Astrophysics

23

Astronomical Spectroscopy, Carbon Monoxide, Galactic Nuclei, Interacting Galaxies, Spectral Resolution, Spiral Galaxies, High Resolution, Infrared Spectra, Radial Distribution, Radio Spectra, Star Formation

Scientific paper

(C-12)O (J = 1-0) observations made with the IRAM 30-m telescope (22-arcsec beam at 115 GHz) are reported for the nearby edge-on spiral galaxy NGC 3628. The central 100 arcsecs have been mapped with 10-arcsec sampling; emission is detected at the 11 positions observed along the galactic plane. The data reveal the presence of a central component unresolved in earlier observations with smaller antennas. It is well detached from the smooth disk emission but only marginally resolved; its size is less than 800 pc, for an H2 mass around 3 x 10 to the 8th solar mass. Six additional positions have been observed 10 arcsec apart from the galactic disk around the CO maximum: the CO plane is not resolved and therefore less than 660 pc in thickness. The central CO component coincides with the compact radio continuum source but not with the far-infrared emission as determined by IRAS.

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