A Correlation Between CO Linewidth and Starburst Age in Barred Spiral Galaxies

Details A Correlation Between CO Linewidth and Starburst Age in Barred Spiral Galaxies A Correlation Between CO Linewidth and Starburst Age in Barred Spiral Galaxies

1996-12-18

arxiv.org/abs/astro-ph/9612173v1

Astronomy and Astrophysics

Astrophysics

Accepted for publication in A&A. 4 pages, including one figure. LateX using l-aa and epsf macros

Scientific paper

New CO(1-0) and CO(2-1) profiles complemented by data from the literature are used to obtain CO linewidths for 29 barred spiral galaxies with young nuclear starbursts. The ages of the starbursts were estimated from optical spectroscopy and recent evolutionary synthesis models. The CO linewidths and the starburst ages are correlated : galaxies with young (4-6 Myr) starbursts display narrow (< 100 km/s) CO line while those with older starbursts show broader CO lines. We discuss several scenarios of the gas dynamics during the nuclear starbursts' evolution to interpret the correlation.

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