Документ взят из кэша поисковой машины. Адрес
оригинального документа
: http://www.arcetri.astro.it/science/gal-agn/res_sani.html
Дата изменения: Fri Aug 14 17:46:35 2009 Дата индексирования: Tue Oct 2 12:49:51 2012 Кодировка: Поисковые слова: п п п п п п п п п п п п п п п п п п п |
The starburst-AGN connection in local and distant galaxies is relevant
for understanding galaxy formation and evolution, the star formation and
metal enrichment history of the universe, the origin of the
extragalactic background at low and high energies, and the origin of
nuclear activity in galaxies.
In particular, using ground based and space observatories, I investigate
the AGN and Star Formtaion spectral signatures disentangling their
contributions to the observed spectrum of the source.
The analysis has been applied to composite sources, such as ULIRGs
(Ultraluminous InfraRed Galaxies, whose primary energy source is still
debated) and NLS1 (Narrow Line Seyfert 1, where the extreme feeding
process of the central Black Hole appears related to an enhanced nuclear
star formation activity). Once carefully calibrated in the local
Universe our diagnostic applies also to high redshift galaxies.
The empiric correlation between the mass of black holes at the
centers of nearby galaxies and the mass of their spheroids suggests a
direct link between the formation of spheroids and the growth of central
supermassive black holes (SMBH).
In this contest, I'm interested in detremining the Infrared spheroid
(bulge) structural parameters obtained by a two-dimensional image in
galaxies with well known BH masses. The aim is to investigate the
possibly direct bulge - BH masses relation for both active and
non-active galaxies.