Orbits of maser stars in the rotating Galactic bar

被引：7
|
作者：
Habing, H. J. [1 ]
机构：
[1] Sterrewacht Leiden, POB 9513, NL-2300 RA Leiden, Netherlands
来源：
ASTRONOMY & ASTROPHYSICS | 2016年 / 587卷
关键词：
Galaxy: bulge; Galaxy: center; Galaxy: kinematics and dynamics; DISK IRAS SOURCES; 1612 MHZ SURVEY; MILKY-WAY; OH/IR STARS; BULGE REGION; SPIRAL ARMS; GALAXY; KINEMATICS; MORPHOLOGY; PLANE;
D O I：
10.1051/0004-6361/201526083
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Maser stars have been found with radial velocities up to +350 km s(-1) and down to -350 km s(-1) and exclusively within a few degrees from the Galactic centre. They form two spatially separated streams: one stream is at positive longitudes and consists of stars going away from us and the other is at negative longitudes consisting of stars approaching us. I show that closed orbits in a simple mass model for the bar explain quantitatively the existence of the two streams and the velocities observed. The mass of the bar is estimated on dynamical grounds: 3 x 10(10) M-sun.
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页数：7
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