Past Journal Clubs

http://adsabs.harvard.edu/abs/2009ApJ...699L..17P

http://arxiv.org/abs/0810.4065

PAMELA’s preliminary results on e /e-, which has generated much excitement in the Drak matter community . Kfir and Ranny Boaz will give their impressions.

I will try to review our current understanding of the origin and dynamical evolution of comets in the solar system.

Some references:
Recent papers:
http://adsabs.harvard.edu/abs/2008arXiv0803.2492W
http://adsabs.harvard.edu/abs/2007MNRAS.381..779E

a review:
http://adsabs.harvard.edu/doi/10.1007/s11214-007-9274-3

I will discuss breakouts in light of the recent detections (2008D, 2006aj), with emphasis on the new things we have learned and on the open questions left to be resolved.

I will talk about the possible detection of Ultra High Energy Neutrinos by radio pulses, with different targets such as the moon and Antarctica. I will give a short review of expected neutrino fluxes, interaction, showers and different electromagnetic mechanisms that are responsible for the measured signal, such as the Askaryan effect and coherent Cerenkov radiation. Finally, I will talk about current upper limits from previous experiments and
Lecturer:

Today it is accepted that galaxies undergo an active phase, during which accretion gas disk rotate around a super massive black hole. These galaxies, which are known as AGNs (active galactic nuclei), are very luminous and have special properties.
In my talk I will give an introduction about AGN galaxies and explain the latest observations, which imply that a rotating wind emerges from the accretion disk.