Circumnuclear star formation in M100

Stuart D. Ryder; Johan H. Knapen

doi:10.1023/A:1017578713184

Circumnuclear star formation in M100

Stuart D. Ryder^*, Johan H. Knapen

^*Corresponding author for this work

Research output: Contribution to journal › Article

Abstract

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 language	English
Pages (from-to)	405-412
Number of pages	8
Journal	Astrophysics and Space Science
Volume	276
Issue number	2-4
DOIs	https://doi.org/10.1023/A:1017578713184
Publication status	Published - 1 Dec 2001
Externally published	Yes

Keywords

Star Formation
Equivalent Width
Stellar Population
Luminosity Function
Density Wave Spiral

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10.1023/A:1017578713184

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abstract = "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.",

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