Multi-messenger analysis of galactic transient sources

par Alexis Coleiro (APC)

lundi 1 févr. 2016, 14:00 → 15:00 Europe/Paris

Amphithéâtre (CPPM)

High energy sources in our Galaxy are "local" test of physical processes occuring close to compact objects such as black holes and neutron stars. In particular, accreting binaries are composed of a compact object orbiting a companion non-degenerate star. Due to the strong gravitational attraction, matter expelled from the companion is accreted by the compact object and part of it is accelerated through jets. These laboratories of frontier physics enable us to probe several major physical processes. In particular, recent detection of GeV-TeV gamma-ray signal from some of these accreting binaries confirms that they can produce outflows containing particles accelerated away from the compact object up to relativistic speeds. I will describe how a wealth of observations, from the high-energy side to the radio domain, together with a multi-messenger approach (mainly based on high energy neutrino search), provide an important insight into the physical processes that occur in these sources but also into their impact on the Galaxy. New instruments that will continuously monitor the sky in different energy bands and with different messengers in the next future will also be discussed, focusing on the importance of a dedicated multi-messenger approach to better understand these sources.

Slides Coleiro_CPPM.compressed.pdf