The pattern speed of the Galactic bulge

Author(s):  
Agris J. Kalnajs
Keyword(s):  
2019 ◽  
Vol 14 (S353) ◽  
pp. 29-30
Author(s):  
Jonathan P. Clarke ◽  
Christopher Wegg ◽  
Ortwin Gerhard ◽  
Leigh C. Smith ◽  
Phil W. Lucas ◽  
...  

AbstractWe have derived absolute proper motions of stars in the Galactic bulge region combining the VVV InfraRed Astrometric Catalogue (VIRAC) and Gaia. We use the proper motions to study the kinematic structure of the bulge both integrated along the line-of-sight and in magnitude intervals using red clump stars as standard candles. In parallel we compare to a made-to-measure barred dynamical model, folding in the VIRAC selection function, to understand and interpret the structures that we observe. The barred dynamical model, which contains a boxy/peanut bulge, and has a pattern speed of 37.5 kms−1 kpc−1, is able to reproduce all structures impressively well.


2000 ◽  
Vol 120 (2) ◽  
pp. 833-844 ◽  
Author(s):  
Solange V. Ramírez ◽  
Andrew W. Stephens ◽  
Jay A. Frogel ◽  
D. L. DePoy

1999 ◽  
Vol 117 (5) ◽  
pp. 2296-2307 ◽  
Author(s):  
Jay A. Frogel ◽  
Glenn P. Tiede ◽  
Leslie E. Kuchinski
Keyword(s):  

2021 ◽  
Vol 2021 (07) ◽  
pp. E01
Author(s):  
Harrison Ploeg ◽  
Chris Gordon ◽  
Roland Crocker ◽  
Oscar Macias

1998 ◽  
Vol 11 (1) ◽  
pp. 560-561
Author(s):  
M. Grenon

As a preparation to the HIPPARCOS mission, a large observing programme on NLTT stars (propermotion > 0.18 ″/yr) was started in Genevaphotometry. The original programme consists of 10047 stars brighter than mR = 11.5, or mR = 12.5 if of colour class m. Among them, 7813 targets could be included in the HIPPARCOS programme, selected according to their observability and internal priorities in favour of large parallaxe stars (photometric distances < 100 pc) and high-velocity stars. The bulk of new nearby, halo, mild-metal poor and SMR stars in the HIP Catalogue originates from this proposal (N° 139). No less than 208 new nearby stars with π ≥ 40 mas were discovered south of δ +10°, the closest has π(HIP)= 182 mas. Radial velocities were obtained with CORAVEL at OHP and ESO. Most aspects of the early evolution of the Galaxy may be addressed with this sample. Here we discuss, as examples, the ages of the thick disk and of the galactic bulge.


2000 ◽  
Vol 536 (2) ◽  
pp. 798-815 ◽  
Author(s):  
C. Alcock ◽  
R. A. Allsman ◽  
D. R. Alves ◽  
T. S. Axelrod ◽  
A. C. Becker ◽  
...  

2010 ◽  
Vol 517 ◽  
pp. A44 ◽  
Author(s):  
S. Uttenthaler ◽  
M. Stute ◽  
R. Sahai ◽  
J. A. D. L. Blommaert ◽  
M. Schultheis ◽  
...  

Nature ◽  
1983 ◽  
Vol 301 (5897) ◽  
pp. 222-223 ◽  
Author(s):  
A. C. Fabian ◽  
J. E. Pringle ◽  
F. Verbunt ◽  
R. A. Wade

Sign in / Sign up

Export Citation Format

Share Document