Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-04-14
Astronomy and Astrophysics
Astrophysics
4 pages, 10 figures. To appear in the proceedings of the International Workshop Astronomia Dinamica en Latino-America (ADeLA 2
Scientific paper
We present preliminary results of a RR Lyrae star search and stellar populations study performed in the Canis Major overdensity, spanning an area of 8.35sq deg. The observations were made in R and V bands, with the QUEST camera installed in the 1m Jurgen Stock Telescope, at the Venezuela National Observatory. The resulting Hess diagram shows a possible, but weak, red giant branch and no obvious horizontal branch, red clump or main sequence turnoff. After a multi--epoch photometric search, 6 RR Lyrae stars were confirmed with further observations obtained at the 1.0 and 1.3m telescopes of the SMARTS consortium at CTIO. Of these confirmed RR Lyrae stars, 5 have heliocentric distances between 5 and 7 kpc. Confirmation of their physsical association with the Canis Major system awaits for a study of their radial velocities.
Mateu Cecilia E.
Miller Lissa
Vivas Katherina A.
Zinn Robert
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