[SGG2000] 82349 , the SIMBAD biblio

2000A&A...362..215S - Astronomy and Astrophysics, volume 362, 215-222 (2000/10-1)

DENIS and ISOGAL properties of variable star candidates in the Galactic Bulge.

SCHULTHEIS M., GANESH S., GLASS I.S., OMONT A., ORTIZ R., SIMON G., VAN LOON J.T., ALARD C., BLOMMAERT J.A.D.L., BORSENBERGER J., FOUQUE P. and HABING H.J.

Abstract (from CDS):

Repeated DENIS observations (summer 1996 & 1998) in the J (1.25µm) and the KS (2.15µm) bands are used to look for variable stars. We present two catalogues of ∼1000 probable variables in an area of ∼4deg2 of the inner galactic bulge. The first one contains ∼720 variable star candidates which show variability in J and KS while the second consists of sources only observed to be variable in KS (∼270 sources), mainly in regions with high interstellar extinction. Using the extinction map by Schultheis et al. (1999A&A...349L..69S), most of the variable stars are found to be above the RGB tip and thus belong to the AGB while there is a small fraction of candidates which could be below the RGB tip with rather small ``amplitudes'' of ∼0.3-0.4mag in KS. Our catalogue has been cross-correlated with five ISOGAL fields (total area ∼0.5deg2) in order to study the mid-IR properties of the LPVs. The AGB variables can be distinguished from other M-type giants by their high 7µm luminosities and redder K0-[7] colours. Based on a few repeated ISOCAM observations a good correlation is found between near- and mid-IR variability.

Abstract Copyright:

Journal keyword(s): stars: AGB and post-AGB - stars: variables: general - ISM: dust, extinction - Galaxy: general - infrared: stars

VizieR on-line data: <Available at CDS (J/A+A/362/215): table2a.dat table2b.dat>

Nomenclature: Tables 2a-2b: [SGG2000] NNNNNN N=720+271.

Simbad objects: 992

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