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Table · dataset · 2004

OGLE variables in Galactic bar

Listed in IVOA Registry (Virtual Observatory)

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.

Description

The periods are in the range 10<P<100d, and amplitudes in the range 0.005<A<0.13mag in the I band. The variables cover a broad range of reddening-corrected colours, 1<(V-I)_0_<5, and a fairly narrow range of extinction-corrected apparent magnitudes, 10.5<I_0_<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 I_k,0_=11.82 for l=+8{deg} to I_k,0_=12.07 for l=-5{deg}, clearly indicating that they are located in the Galactic bar. Most variables have several oscillation periods.

Links

Topics

Stated by source
Optical
Provenance · 1 source records, 8 field assertions
SourceKeyLast seenRaw
IVOA Registry (Virtual Observatory)ivo://cds.vizier/j/mnras/349/105910 d agoJSON v1
FieldAssertionExtractorEvidence
access_levelsource · IVOA Registryconnector:ivoa_registry@1.0.0
concepts[field].local:field:astronomymapping · IVOA Registryconnector:ivoa_registry@1.0.0
concepts[modality].ivoa_waveband:opticalsource · IVOA Registryconnector:ivoa_registry@1.0.0
descriptionsource · IVOA Registryconnector:ivoa_registry@1.0.0rr.resource.res_description
license_textsource · IVOA Registryconnector:ivoa_registry@1.0.0
publication_datesource · IVOA Registryconnector:ivoa_registry@1.0.0
titlesource · IVOA Registryconnector:ivoa_registry@1.0.0rr.resource.res_title
updated_datesource · IVOA Registryconnector:ivoa_registry@1.0.0