Is Messier 74 a barred spiral galaxy? Near-infrared imaging of M74

被引：10
|
作者：
Seigar, MS [1 ]
机构：
[1] Joint Astron Ctr, Hilo, HI 96720 USA
来源：
ASTRONOMY & ASTROPHYSICS | 2002年 / 393卷 / 02期
关键词：
galaxies : individual : M74; galaxies : fundamental parameters; galaxies : spiral; galaxies : structure;
D O I：
10.1051/0004-6361:20021060
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We have obtained ground-based I, J and K band images of the spiral galaxy, Messier 74 (NGC 628). This galaxy has been shown to possess a circumnuclear ring of star formation from both near-infrared spectroscopy of CO absorption and sub-millimetre imaging of CO emission. Circumnuclear rings of star formation are believed to exist only as a result of a bar potential. In this paper we show evidence for a weak oval distortion in the centre of M74. We use the results of Combes & Gerin (1985) to suggest that this weak oval potential is responsible for the circumnuclear ring of star formation observed in M74.
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收藏
页码：499 / 502
页数：4
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