Molecular rings in galaxies and a possible new cosmic distance indicator

Details Molecular rings in galaxies and a possible new cosmic distance indicator Molecular rings in galaxies and a possible new cosmic distance indicator

Oct 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991pasj...43..671s&link_type=abstract

Astronomical Society of Japan, Publications (ISSN 0004-6264), vol. 43, no. 5, 1991, p. 671-683. Research supported by Japan Soci

Astronomy and Astrophysics

Astronomy

10

Distance, Galactic Nuclei, Galactic Structure, Interstellar Gas, Molecular Gases, Carbon Monoxide, Interstellar Extinction, Spiral Galaxies, Starburst Galaxies

Scientific paper

The molecular gas distribution in the nuclear regions of galaxies can be classified into three types: a core (C) type with a high-density peak toward the nucleus; a compact-ring (CR) type with ring radius of about 200 pc; and a broad-ring (BR) type with ring radius of 750 pc. The possibility of using the ring radius as a cosmic distance indicator is examined for galaxies of up to about 100 Mpc. This geometrical method is independent of such correction factors as extinction and reddening.

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