Some areas of research are Galactic Astronomy and stellar populations, in which blue variable stars from our galaxy and the Magellanic Clouds are studied, including Be stars and new types of variables recently discovered. These studies are based on photometric and spectroscopic data in visible and infrared bands, obtained from different telescopes installed in Chile, and are carried out in collaboration with astronomers of Polish and Chilean universities. The purpose of this research is to contribute to the improvement of knowledge and understanding of the Be phenomenon and to come to fully clarifying the nature of the blue variables mentioned. On the other hand, the brown dwarfs are also studied from the observational point of view, especially in the understanding of the photometric variability observed in them and its relation with the formation of clouds in their atmospheres. Also of great interest is the study of brown dwarfs´ transitions between spectral types L and T. The research in frontier topics such as the calibration of the extragalactic distance scale using stellar indicators as Cepheid variables, allows for observational studies in collaboration with Chilean and Polish astronomers, using the best telescopes in the world. The main objective of this research is to calibrate the dependence of the period-luminosity relationships of Cepheid variables with the metallicity of the stellar populations. Another area of work is astrometry, which discriminates stellar populations into various environments for instance open disk clusters and the bulge of the galaxy, making it possible to establish the age, distance and interstellar extinction of these populations.
Another area actively uses the facilities of the University Astronomical Observatory, which houses a telescope of 40 centimeters in diameter, fitted with several CCD cameras; the Observatory also has spectrographs of low, medium and high resolution. Projects of a formative nature for students in the areas of Astrometry, photometry and stellar spectrography are designed with this equipment. The possibility of radio-frequency observations is also explored.
- Jose Alejandro García Varela
- Benjamín Oostra Van Noppen
- Beatriz Sabogal Martínez
- Jaime Ernesto Forero Romero
More information about the research activities of this group in these links: