Date:
Tue, 20/12/201612:30-13:30
Location:
Kaplun building, Room No. 200
Lecturer: Dr. Benny Trakhtenbrot
Affiliation: Institute of Astronomy, ETH Zurich
Abstract:
Supermassive black holes (SMBHs), with
masses reaching ten billions solar masses,
are found in the centers of most galaxies,
and their growth and energy release
mechanisms appear to be closely linked
to the galaxies that host them, making
them central to our understanding of
galaxy evolution. However, the existence
of these extreme systems less than 1 Gyr
after the Big Bang poses major
challenges to our understanding of black
hole formation and early growth. I will
present our continuous, multi-wavelength
observational effort to address this
challenge. Our campaign focuses on
some of the fastest-growing black holes,
at z~5, and covers a broad range of
physical scales and gas phases. The latest
piece in the puzzle comes from our recent
ALMA campaign. These observations
reveal a high fraction of galaxy mergers
among the hosts of the fast-growing z~5
SMBHs, but other mechanisms are
required to account for the extreme star
formation and SMBH growth seen in
some systems. Moreover, the growth of
the black holes and of their hosts may not
proceed in tandem. I will briefly describe
how upcoming surveys and dedicated
facilities may resolve the earliest phases
of BH formation and growth.
Additional details of the upcoming Astrophysics'
seminars can be found on the following link.
האירוע הזה כולל שיחת וידאו ב-Google Hangouts.
הצטרף: https://plus.google.com/hangouts/_/mail.huji.ac.il/astrophysics?hceid=bWFpbC5odWppLmFjLmlsX2c0czhydDlpcmhwZzRvdGNybWIzZGFqcjdvQGdyb3VwLmNhbGVuZGFyLmdvb2dsZS5jb20.u8oc1009nsmbof5sqjjkfcfq6c&hs=121