Date:
Tue, 18/11/201412:30-13:30
Location:
Kaplun building, Room No. 200
Lecturer: Dr. Noam Libeskind
Affiliation: Leibniz-Institut für Astrophysik Potsdam
Abstract:
Dwarf galaxies are the smallest yet most
abundant cosmological objects in
existence. Yet owing to their low luminosity,
they can only be seen in the immediate
neighborhood of the Milky Way, a region
known as the Local Group. Observations of
these galaxies can help us understand key
aspects of the Local Group including the
nature of dark matter, our place in the
cosmos, and how our specific corner of the
universe is embedded in the large scale
structure that surrounds us. Most of these
galaxies have only been recently found and
since their discovery have presented the
paradigm of structure/galaxy formation
(known as the LCDM model) with a number
of challenges. Specifically, dwarf galaxies
in the Local Group appear to cluster on
vast thin planes, an as yet unresolved
problem for the model. I will present some
ideas to explain the origin of this peculiar
set up within the LCDM model, as well as
the first observations of a similar set-up
around a galaxy exterior to the Local
Group.
Additional details of the upcoming Astrophysics'
seminars can be found on the following link.
האירוע הזה כולל שיחת וידאו ב-Google Hangouts.
הצטרף: https://hangouts.google.com/hangouts/_/mail.huji.ac.il/astrophysics?hceid=bWFpbC5odWppLmFjLmlsX2c0czhydDlpcmhwZzRvdGNybWIzZGFqcjdvQGdyb3VwLmNhbGVuZGFyLmdvb2dsZS5jb20.1t29j6bhv1qdsh2utqo1tb6804&hs=121