Astrophysique à Haute Energie

The University of Paris Cité is welcoming a student for a Master project in Data Intensive Astroparticle Physics to work under the supervision of Prof. Yvonne Becherini.

Context and Goal of the research project

Super-massive black holes are known to dwell at the center of galaxies. When accreting matter they are observed from Earth as active galactic nuclei (AGNs). In a minority of AGNs the accretion of matter onto the black-hole is associated with the ejection of a relativistic jet of plasma along the polar axis. 
When the black-hole's jet points right in the direction of the Earth, relativistic effects boost the emission and make these objects among the brightest in the Universe. This peculiar AGNs are called blazars. 

Cette thèse est proposée au sein du groupe d'Astrophysique des Hautes Energies (AHE) du laboratoire APC, qui est cœur du développement de l'astronomie multi-messagers des phénomènes transitoires extrêmes dans l'Univers.

We propose to carry out a study of accretion and ejection processes in black hole systems which are highly variable or transient emitters of high energy photons, by using the multi-wavelength data of the SVOM space mission and the relevant multi-messenger data that will be available to our laboratory.

The origin and nature of cosmic rays at very high energy (UHECRs) is a long-standing puzzle that is still not completely resolved after a century of theoretical and experimental efforts. Neutrinos can travel untouched from their source, thus indicating their locations. Neutrinos of cosmic origin are expected to be produced via the decay of charged pions and kaons, generated in hadronic interactions of cosmic rays with gas or radiation in their acceleration sites or during their propagation.