High-resolution UKIRT observations of circumnuclear star formation in M100

被引：29
|
作者：
Ryder, SD
Knapen, JH
机构：
[1] Joint Astron Ctr, Hilo, HI 96720 USA
[2] Univ Hertfordshire, Dept Phys Sci, Hatfield AL10 9AB, Herts, England
来源：
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 1999年 / 302卷 / 01期
关键词：
galaxies : evolution; galaxies : individual : M100 (NGC 4321); galaxies : kinematics and dynamics; galaxies : structure; infrared : galaxies;
D O I：
10.1046/j.1365-8711.1999.02204.x
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
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.
引用
收藏
页码：L7 / L12
页数：6
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