RR Lyrae stars as tracers of stellar populations in the Galactic bulge and satellite galaxies.

2009 ◽  
Author(s):  
Andrea Malaika. Kunder
Keyword(s):  
Stellar Populations ◽  
Galactic Bulge ◽  
Rr Lyrae Stars ◽  
Rr Lyrae ◽  
Satellite Galaxies ◽  
Lyrae Stars

scholarly journals 3.17. MACHO RR Lyrae stars in the Galactic bulge: the spatial distribution

1998 ◽  
Vol 184 ◽  
pp. 123-124
Author(s):  
D. Minniti ◽  
C. Alcock ◽  
D. Alves ◽  
K. Cook ◽  
S. Marshall ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Density Distribution ◽  
Surface Density ◽  
Galactic Bulge ◽  
Rr Lyrae Stars ◽  
Rr Lyrae ◽  
Type C ◽  
Type Ab ◽  
Lyrae Stars

We have analyzed a sample of 1150 type ab, and 550 type c RR Lyrae stars found in 24 of 94 bulge fields of the MACHO database. These fields cover a range in Galactocentric distances from 0.3 to 1.6 kpc. In combination with the data on the outer bulge fields of Alard (1997) and Wesselink (1987), here we present the surface density distribution of bulge RR Lyrae between 0.3 and 3 kpc.

scholarly journals THE EXTINCTION TOWARD THE GALACTIC BULGE FROM RR LYRAE STARS

2008 ◽  
Vol 135 (2) ◽  
pp. 631-636 ◽  
Author(s):  
Andrea Kunder ◽  
Piotr Popowski ◽  
Kem H. Cook ◽  
Brian Chaboyer
Keyword(s):  
Galactic Bulge ◽  
Rr Lyrae Stars ◽  
Rr Lyrae ◽  
Lyrae Stars

New Views From Galactoseismology: Rethinking the Galactic Disk-Halo Connection

2017 ◽  
Vol 13 (S334) ◽  
pp. 185-188
Author(s):  
Allyson A. Sheffield ◽  
Kathryn V. Johnston ◽  
Adrian M. Price-Whelan ◽  
Anastasios Tzanidakis ◽  
Chervin F. P. Laporte ◽  
...  
Keyword(s):  
Formation Mechanism ◽  
Milky Way ◽  
Galactic Disk ◽  
External Perturbation ◽  
Stellar Populations ◽  
Preliminary Evidence ◽  
Low Latitude ◽  
Rr Lyrae Stars ◽  
Rr Lyrae ◽  
Lyrae Stars

AbstractWe present preliminary results from a study exploring the origin of Milky Way substructures, and show initial evidence of a common “kicked-out” formation mechanism for two low-latitude substructures. In this scenario, stars in these substructures formed in the disk and were subsequently “kicked-out” by an external perturbation, such as the merger of an accreted satellite, which created an oscillation in the Galactic disk. To test this origin scenario, we found the fraction of different stellar populations – M giants and RR Lyrae stars – in the Monoceros Ring (also known as GASS) and A13, supplementing a study of stellar populations in the Triangulum-Andromeda cloud. This work provides: (1) the first analysis of the GASS and A13 features based upon their stellar populations; and (2) preliminary evidence of disk stars in the Milky Way that have been relocated to the disk-halo interface due to vertical oscillations of the Milky Way’s disk.

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