scholarly journals Frequency Analysis of δ Scuti and RR Lyrae Stars in the OGLE-1 Database

2002 ◽  
Vol 185 ◽  
pp. 392-395 ◽  
Author(s):  
P. Moskalik ◽  
E. Poretti
Keyword(s):  
Frequency Analysis ◽  
Systematic Search ◽  
Pulsation Frequency ◽  
Galactic Bulge ◽  
Rr Lyrae Stars ◽  
Rr Lyrae ◽  
Lyrae Stars

AbstractWe discuss the results of a systematic search for multi-periodic pulsations in Galactic Bulge δ Scuti and RR Lyrae stars. Six “normal” double-mode variables pulsating in two radial modes have been identified (5 δ Scuti-type and 1 RR Lyrae-type). In 37 RR Lyrae stars secondary periodicities very close to the primary pulsation frequency have been detected. These periodicities correspond to nonradial modes of oscillation. They are found in ∼ 23% of RRab and in ∼ 3% of RRc variables of our sample.

scholarly journals The MACHO Project Large Magellanic Cloud Variable Star Inventory. XI. Frequency Analysis of the Fundamental‐Mode RR Lyrae Stars

2003 ◽  
Vol 598 (1) ◽  
pp. 597-609 ◽  
Author(s):  
C. Alcock ◽  
D. R. Alves ◽  
A. Becker ◽  
D. Bennett ◽  
K. H. Cook ◽  
...  
Keyword(s):  
Frequency Analysis ◽  
Fundamental Mode ◽  
Variable Star ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Rr Lyrae Stars ◽  
Rr Lyrae ◽  
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
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