Star formation in the outer resonance ring of NGC 1300

被引:14
作者
Elmegreen, DM [1 ]
Elmegreen, BG [1 ]
Chromey, FR [1 ]
Hasselbacher, DA [1 ]
机构
[1] IBM CORP,THOMAS J WATSON RES CTR,YORKTOWN HTS,NY 10598
关键词
galaxies; individual; (NGC; 1300); kinematics and dynamics; photometry; spiral; structure; stars; formation;
D O I
10.1086/177765
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Surface photometry of the barred galaxy NGC 1300 in B and I bands reveals an outer pseudo-ring with star formation knots located at the positions of 10(8) M(circle dot) H I clouds previously mapped by M. England with the VLA. The age of the ring from the B-I colors is estimated to be similar to 10(9) yr, and the age of the star formation knots is estimated to be similar to 2 x 10(7) yr. Stability considerations suggest that the H I clouds formed by gravitational condensation along the ring periphery. If the outer extent of the ring is at the outer Lindblad resonance, then the bar ends slightly outside the inner 4:1 resonance and corotation is at the position of the break and dust lane crossing midway out in the spiral arms.
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页码:131 / &
页数:8
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