The detection of CO in NGC 4594

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Carbon Monoxide, Galactic Evolution, Galactic Nuclei, Spiral Galaxies, Astronomical Spectroscopy, Interstellar Gas, Interstellar Matter, Stellar Evolution

Scientific paper

The early-type spiral galaxy NGC 4594 (M 104, the 'Sombrero' galaxy) has been observed in the (1-0) and (2-1) line transitions of (C-12)O with the 30-m mm-radio telescope of IRAM at Pico Veleta. Here, the detections of molecular material at + or - 140 arcsec from the nucleus of M 104 along the major axis are presented. The location of the detected CO coincides with the inner H I annulus, the dust ring, and the peaks of radio continuum emission. No CO was detected in the nuclear area of NGC 4594. The detection is discussed in an evolutionary scenario for the interstellar medium in early-type disk galaxies.

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