Structure and Kinematics of the Milky Way
2017 ◽
Vol 13
(S336)
◽
pp. 148-153
◽
Keyword(s):
AbstractMaser astrometry is now providing parallaxes with accuracies of ±10 micro-arcseconds, which corresponds to 10% accuracy at a distance of 10 kpc! The VLBA BeSSeL Survey and the Japanese VERA project have measured ≈200 parallaxes for masers associated with young, high-mass stars. Since these stars are found in spiral arms, we now are directly mapping the spiral structure of the Milky Way. Combining parallaxes, proper motions, and Doppler velocities, we have complete 6-dimensional phase-space information. Modeling these data yields the distance to the Galactic Center, the rotation speed of the Galaxy at the Sun, and the nature of the rotation curve.
1998 ◽
Vol 184
◽
pp. 433-434
Keyword(s):
2012 ◽
Vol 8
(S287)
◽
pp. 421-422
Keyword(s):
2020 ◽
Vol 496
(1)
◽
pp. 638-648
◽
Keyword(s):
2007 ◽
Vol 16
(12b)
◽
pp. 2399-2405
◽
Keyword(s):
1996 ◽
Vol 173
◽
pp. 175-176
Keyword(s):
1988 ◽
Vol 126
◽
pp. 37-48
Keyword(s):
2020 ◽
Vol 497
(2)
◽
pp. 2442-2454
◽
Keyword(s):