Astronomy and Astrophysics – Astrophysics
Scientific paper
1999-08-04
Astronomy and Astrophysics
Astrophysics
10 pages, 14 figures. Accepted by A&AS
Scientific paper
10.1051/aas:1999398
Intensive monitoring of low-extinction windows towards the galactic bulge has provided in the last years valuable information for studies about the dynamics, kinematics and formation history of this part of the galaxy, mainly by characterizing the bulge stellar populations (Paczy\'nski, 1996). Since 1997, we have been conducting an intensive photometric-astrometric survey of the galactic bulge, with the monitoring of about 120000 stars in 12 windows uniformly distributed in galactic latitude and longitude (Blanco & Terndrup, 1989 e Blanco, 1988) never before submitted to this kind of survey. For this purpose, we have used the IAG/USP CCD Meridian Circle of the Abrah\~ao de Moraes Observatory. The main objective of this work is the identification and classification of variable objects. In this work we present the set up and development of the necessary tools for a project like this and the posterior analysis of our data. We briefly describe the construction of a program to organize and detect variables among the observed stars, including real time alerts (for variations greater than 0.3 magnitudes). The preliminary analysis after the processing of 76 nights of observation yielded 479 variable stars, from which 96.7 % of them are new. We discuss the preliminary classification of this variables, based on: a) the observed amplitude of variation; b) the shape of light curve; c) the expected variable classes among our data and d) the calculated periods, whenever possible. Finally, we discuss the future perspectives for the project and for the applications and analysis of the discovered variable stars.
Benevides-Soares Paulo
Dominici Tânia P.
Horvath Jorge Ernesto
Medina Tanco Gustavo A.
Teixeira Ramachrisna
No associations
LandOfFree
Stellar variability in low-extinction regions towards the Galactic Bulge does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Stellar variability in low-extinction regions towards the Galactic Bulge, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Stellar variability in low-extinction regions towards the Galactic Bulge will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-374247