Astrophysics of Galaxies and Systems of Galaxies. AGN. Cosmology.
Dept.Galaxies - 25 years NAO(pdf)
      Photo'06  and Photo'11
Galaxies-publications 1979 - 2010   

        Physical processes and chemical abundance in galaxies, systems of galaxies and the Universe are investigated. Photometry and Surface photometry of normal and active galaxies and galaxies in Voids are carried out. Disk profiles and  starformation in galaxies are investigated. Structures of galaxies and clusters of galaxies are searched. Some catalogs of the most massive structures are compiled and the large scale structure in the Universe is studied. Primordial nucleosynthesis  and chemical evolution of the light elements in the presence of neutrino oscillations is analysed. Cosmological constraints on oscillation parameters are obtained. Different baryogenesis scenarios are investigated. Possibilities of antimatter in the Universe are studied.
        Extragalactic Astronomy - The field that deals with objects beyond the Milky Way, especially galaxies and quasars.
        Extragalactic Distance Scale - The set of distances to astronomical objects outside our galaxy. It is difficult to obtain distances to objects further than about 10 million light years with accuracies better than about 25%.

Active Galactic Nucleus - AGN -- An unusually bright galactic nucleus whose light is not due to starlight. Active Galaxy - Any galaxy which is emitting large quantities of non-thermal radiation. (b) Active galactic nuclei are very luminous (10^43-10^46 ergs s-1). Their energy output is in two forms: nonthermal continuum and thermal emission line. Astrophysics - (a) The science that studies the physics and chemistry of extraterrestrial objects. The alliance of physics and astronomy, which began with the advent of spectroscopy, made it possible to investigate what celestial objects are and not just where they are. (b) All applications of the laws of physics, chemistry and the other physical sciences to the understanding of astronomical phenomena.

IAU commission 28 - GALAXIES  (Old)                               Old IAU commission 47 - GOSMOLOGY  (Old)

Simulation of colliding, interconnecting  and merging of galaxies ...                                                                                     For REVIEW papers see below...

Department "GALAXIES" - 2011 main projects:

  • International cooperation - Germany, Finland, Russia, Italy etc.
  • Regional Center for Astronomical Research and EDUCATION  (RACIO - pdf)

Author: G.T. Petrov ,  Institute of Astronomy, Bulgarian Academy of Sciences, 72 - Tsarigradsko Chaussee, 1784-Sofia, Bulgaria
mail to: petrov[at]astro[dot]bas[dot]bg          The page is permanently ...
Created at 28.12.2004 (Last updated at 24.03.2016) Basic location at Institute of Astronomy at