Circumnuclear star formation in M100

Stuart D. Ryder*, Johan H. Knapen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


Near-infrared (J H K) 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.

Original languageEnglish
Pages (from-to)405-412
Number of pages8
JournalAstrophysics and Space Science
Issue number2-4
Publication statusPublished - 1 Dec 2001
Externally publishedYes


  • Star Formation
  • Equivalent Width
  • Stellar Population
  • Luminosity Function
  • Density Wave Spiral


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