STAR FORMATION IN THE SPIRAL ARMS OF NGC-4321 .1. CO OBSERVATIONS

被引：16
|
作者：
CEPA, J
BECKMAN, JE
KNAPEN, JH
NAKAI, N
KUNO, N
机构：
[1] KAPTEYN ASTRON INST,9700 AV GRONINGEN,NETHERLANDS
[2] NOBEYAMA RADIO OBSERV,MINAMISA KU,NAGANO 38413,JAPAN
[3] TOHOKU UNIV,INST ASTRON,SENDAI,MIYAGI 980,JAPAN
来源：
ASTRONOMICAL JOURNAL | 1992年 / 103卷 / 02期
关键词：
D O I：
10.1086/116072
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Several positions in the southern spiral arm and the interarm disk of NGC 4321 have been observed in CO (J = 1 --> 0) using the NRO 45 m telescope at Nobeyama, Japan. The analysis shows evidence for streaming motions in the arms, together with an exponential radial decrease of both the integrated CO emission and the velocity width at the observed positions, with comparable scale lengths. The arm/interarm contrast ratio of CO integrated emission shows values ranging from less than one to four.
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页码：429 / &
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