Circumnuclear Star Formation in M100

Details Circumnuclear Star Formation in M100 Circumnuclear Star Formation in M100

Mar 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001ap%26ss.276..405r&link_type=abstract

Astrophysics and Space Science, v. 276, Issue 2/4, p. 405-412 (2001).

Astronomy and Astrophysics

Astrophysics

Scientific paper

Near-infrared (JHK) images of the nucleus of the barred spiral galaxy M100 (NGC 4321) have been obtained using a high-bandwidth tip-tilt secondary and fast guider system on the 3.8 m United Kingdom Infrared Telescope (UKIRT). The resulting images, with a resolution of 0.34'' at K, reveal for the first time a host of compact `knots', which appear to be the result of a recent burst (or bursts) of star formation. Confirmation of this comes from K-band spectroscopy of these knots with CGS4 on UKIRT, which shows Brγ emission and CO absorption features. A comparison with starburst evolutionary models suggests ages for these knots of between 17 and 27 Myr, and a stellar population dominated by late-type supergiants.

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