The corotation gap in the Galactic H i distribution

被引：25
作者：
Amores, E. B. [1 ,2 ]
Lepine, J. R. D. [1 ]
Mishurov, Yu. N. [3 ,4 ]
机构：
[1] Univ Sao Paulo, Inst Astron Geof & Ciencias Atmosfer, BR-05508900 Sao Paulo, Brazil
[2] Univ Lisbon, SIM IDL, Fac Ciencias, P-1749016 Lisbon, Portugal
[3] So Fed Univ, Space Res Dept, Rostov Na Donu 344090, Russia
[4] Russian Acad Sci, Special Astrophys Observ, Nizhnii Arkhyz, Karachaevo Cher, Russia
来源：
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2009年 / 400卷 / 04期
关键词：
Galaxy: disc; Galaxy: general; Galaxy: kinematics and dynamics; Galaxy: structure; galaxies: spiral; FINAL DATA RELEASE; SPIRAL STRUCTURE; MILKY-WAY; PATTERN SPEED; YOUNG STARS; ABUNDANCE PATTERN; ROTATION CURVE; OPEN CLUSTERS; LAB SURVEY; GALAXY;
D O I：
10.1111/j.1365-2966.2009.15611.x
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We used the H i data from the LAB Survey to map the ring-shaped gap in H i density that lies slightly outside the solar circle. Adopting R-0 = 7.5 kpc, we find an average gap radius of 8.3 kpc and an average gap width of 0.8 kpc. The characteristics of the H i gap correspond closely to the expected ones, as predicted by theory and by numerical simulations of the gas flow near the corotation resonance.
引用
收藏
页码：1768 / 1774
页数：7
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