ELFT HÍRADÓ

[<szpl AT metal.elte.hu>]

ELTE Fizikai Intézet

                                ORTVAY KOLLOKVIUM

                    2015. március 26., csütörtök, 15:00-kor
                Az ELTE Pázmány Péter s. 1/A alatti épületében
                           földszinti 0.81 előadóban

                                Werner Norbert
(Kavli Institute for Particle Astrophysics and Cosmology, Stanford, CA, USA)

   „A szupermasszív feketelyukaktól a világűr nagyléptékű szerkezetéig"

Kivonatos ismertetés:
I will present recent observational results on the nature and origin of 
the multi-phase interstellar medium in giant elliptical galaxies, and its 
role in galaxy evolution and in fueling the central supermassive black holes. 
Our results show that the cold gas in these systems is produced chiefly by 
thermally unstable cooling from the hot phase, and that jets emanating from 
accreting supermassive blackholes are likely to play a crucial role in 
clearing giant elliptical galaxies of their cold gas, keeping them 'red 
and dead'. Then I will 'zoom out' to the outskirts of galaxy clusters where 
we also find hints that supermassive black holes played an important role 
in the distant past. X-ray observations with the Suzaku satellite reveal a 
remarkably homogeneous distribution of iron out to the virial radius of the 
nearby Perseus Cluster, requiring that most of the metal enrichment of the 
intergalactic medium occurred before the cluster formed, probably more than 
ten billion years ago, during the period of maximal star formation and black 
hole activity. Finally, I will talk about the upcoming ASTRO-H mission which 
will revolutionize X-ray spectroscopy and our understanding of the 
intergalactic medium.