High-resolution UKIRT observations of circumnuclear star formation in M100

Details High-resolution UKIRT observations of circumnuclear star formation in M100 High-resolution UKIRT observations of circumnuclear star formation in M100

1998-10-21

arxiv.org/abs/astro-ph/9810350v1

Astronomy and Astrophysics

Astrophysics

10 pages, 4 figures, uses mn-1.4.sty. Accepted for publication in Monthly Notices of the Royal Astronomical Society

Scientific paper

10.1046/j.1365-8711.1999.02204.x

We present high-resolution, near-infrared imaging of the circumnuclear region of the barred spiral galaxy M100 (=NGC 4321), accompanied by near-infrared spectroscopy. We identify a total of 43 distinct regions in the K-band image, and determine magnitudes and colours for 41 of them. By comparison with other near-infrared maps we also derive colour excesses and K-band extinctions for the knots. Combining the imaging and spectroscopic results, we conclude that the knots are the result of bursts of star formation within the last 15-25 Myr. We discuss the implications of these new results for our dynamical and evolutionary understanding of this galaxy.

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