Astrophysics Seminar

"Astrophysics Seminar: Simulating non standard-cosmologies / Constrained simulations of the local Universe"

Location: 
Kaplun building, Room No. 200
Tue, 11/11/2014 - 12:30 to 13:30

Lecturer: Dr. Edoardo Carlesi Affiliation: Racah Institute of Physics, Hebrew University of Jerusalem Abstract: In the first part of this introductory talk I will describe my PhD work on N- Body/Hydro simulations of non standard cosmological models (of interacting dark matter-dark energy), which I did under the supervision of prof. Alexander Knebe at the Universidad Autonoma in Madrid. After reviewing the key features of these models as well as their numerical implementation into an N-Body code, I will discuss the main differences that could help distinguish these cosmologies

Mr. Elad Zinger, Racah Institute of Physics

Location: 
Kaplun building, Room No. 200
Tue, 23/04/2013 - 12:30 to 13:30

Structure and Properties of the Intra-Cluster Medium and the Role of Gas Streams: The study of the Intra-Cluster Medium (ICM) is at an exciting point in time. Observations have recently begun to probe the outer regions of clusters even as numerical capabilities allowed for a more detailed and comprehensive view of the process taking place within it. In particular, it has become clear that mass accretion into galaxy clusters in particular does not occur in a quasi-spherical manner, but rather along well defined streams.

"Astrophysics Seminar: The effect of plasma inhomogeneity on particle acceleration and associated radio emission generation in space and solar plasmas"

Location: 
Kaplun building, Room No. 200
Tue, 04/11/2014 - 12:30 to 13:30

Lecturer: Dr. David Tsiklauri Affiliation: Queen Mary University of London Abstract: The main unsolved problems in space/solar plasmas will be briefly reviewed, followed by a more detailed discussion of the effect of plasma inhomogeneity on particle acceleration and associated radio emission generation. Extensive particle-in-cell simulations of fast electron beams injected in a background magnetised plasma with a decreasing density profile along the magnetic field were carried out. These simulations were intended to further shed light on a newly proposed mechanism for the

Prof. Frank van den Bosch

Location: 
Kaplun Building, seminar room, 2nd floor
Tue, 10/01/2012 - 12:30 to 14:00

Subject: "Dark Halo Response and the Stellar IMF in Early- and Late-Type Galaxies"

Dr. Yuri Levin

Location: 
Kaplun Building, seminar room, 2nd floor
Tue, 06/12/2011 - 12:30 to 13:30

On Gravitational-wave detection by Pulsar Timing Arrays"

"High Energy Astrophysics Seminar: High-Energy Neutrinos as New Cosmic Messengers"

Location: 
Kaplun building, Room No. 200
Thu, 04/09/2014 - 13:00 to 14:00

Prof. Kohta MuraseIn, Institute for Advanced Study (IAS) Abstract: 2013, the IceCube collaboration reported 28 events of high-energy neutrino events. They are likely to contain extraterrestrial signals, and it is the dawn of a new age of neutrino astrophysics. In this talk, I try to demystify the origin of the observed neutrino signals. I discuss various astrophysical possibilities, and then demonstrate the power of the multi-messenger approach to reveal the origin.