Galactic Dynamics Research Group
--Hot Topic--
--News--
Tue, 29 Nov 2011 10:00:00
TALK: Devaky Kunneriath: The Galactic center region

Astronomical Institute, Academy of Sciences, Prague

Abstract
High angular resolution radio interferometry at high frequencies enables us to study in great detail ... more
Wed, 23 Nov 2011 15:00:00
TALK: Agata Rozanska: Radiative transfer approach for X-ray astronomy

N. Copernicus Astronomical Center, Warsaw, Poland
Mon, 31 Oct 2011 14:00:00
TALK: Martin Setvak: Meteorologicke druzice Meteosat druhe generace

Czech Hydrometeorological Institute, Satellite Department, Prague

Abstract
Meteosat Second Generation (MSG) a organizace EUMETSAT. Strucna historie a status organizace, clenstvi CR, licencni ... more
Mon, 25 Jul 2011 14:00:00
TALK: Tapas K. Das: Portrait of a Dark Face

Harish-Chandra Research Institute, India

Abstract
The massive black hole at our Galactic centre possesses largest apparent angular size of the event horizon. ... more
Showing 1 to 4 of total 162 records
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--About us--
Our Galaxy and other nearby galaxies are studied as dynamical systems with dissipation. We consider three complementary approaches to the subject:
  1. Energy dissipation in the interstellar medium: the system of gravitating and inelastically colliding massive molecular clouds is analyzed using an N-body code. The evolution of the galaxy and formation of rings in simulations is compared with the molecular rings observed in Milky Way and nearby galaxies M51, M82, NGC 891 and NGC 4565.
  2. Anomalous HI structures and their connection with OB associations: the data on HI distribution in the Milky Way, Large and Small Magellanic Clouds, M 31 and Holmberg II galaxies are compared with numerical simulations of expanding supershells. We study their connection to OB associations, open star clusters and to the distribution of the interstellar medium. Already existing data are complemented with new observations from the Effelsberg 100m radiotelescope (Germany), the Australian telescope compact array in Narrabri and the Parkes 64m radiotelescope (Australia).
  3. The propagation of star formation in galaxies: the propagating star formation, resulting from the self-regulating feedback between star formation in clouds, expansion of HI supershells and cloud formation, is studied. The main partners are Observatoire de Meudon (Paris), Max-Planck Institut fur Radioastronomie in Bonn and Institut fur Astronomie und Astrophysik der Universitat Kiel.

Recent results:
The galactic distribution of 63 HI shells discovered by Heiles (1979, 1984) has been discussed. Their ages were estimated using a model of an expanding infinitesimally thin shell. An equlibrium shell formation rate was derived and we concluded that its radial distribution in the galactic disc is close to the distribution of the stars indicating that the majority of the observed shells in the Milky Way is related to the star formation rather than to the infall of high velocity clouds.
--Publications--
10/2011 - Wunsch, R., Silich, S., Palous, J., Tenorio-Tagle, G., Munoz-Tunon, C., Evolution of Super Star Cluster Winds with Strong Cooling
ApJ, Volume 740, Issue 2, article id. 75
08/2011 - Bisbas, T. G., Wunsch, R., Whitworth, A. P., Hubber, D. A., Walch, S.,
ApJ, Volume 736, Issue 2, article id. 142
08/2011 - Ortolani, S., Barbuy, B., Momany, Y., Saviane, I., Bica, E., Jilkova, L., Salerno, G. M.; Jungwiert, B., A Fossil Bulge Globular Cluster Revealed by very Large Telescope Multi-conjugate Adaptive Optics
ApJ, Volume 737, Issue 1, article id. 31
Showing 1 to 3 of total 62 records
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© Copyright Adam Ruzicka 2005-2009