OGLE variables in Galactic bar (Wray+, 2004)

Details OGLE variables in Galactic bar (Wray+, 2004) OGLE variables in Galactic bar (Wray+, 2004)

Jun 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004ycat..73491059w&link_type=abstract

VizieR On-line Data Catalog: J/MNRAS/349/1059. Originally published in: 2004MNRAS.349.1059W

Physics

Stars: Variable, Photometry

Scientific paper

Among over 200000 Galactic bulge variable stars in the public domain Optical Gravitational Lensing Experiment (OGLE) catalogue, we found over 15000 red giant variables following two well-defined period-amplitude relations. The periods are in the range 100<5, and a fairly narrow range of extinction-corrected apparent magnitudes, 10.50<13. A subset of variables (type A) has an rms scatter of only 0.44mag. The average magnitudes for these stars are well correlated with the Galactic longitude, and vary from Ik,0=11.82 for l=+8{deg} to Ik,0=12.07 for l=-5{deg}, clearly indicating that they are located in the Galactic bar. Most variables have several oscillation periods.
(3 data files).

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