Pooja Surajbali

Pooja Surajbali (Mauritius)

pooja @ mpi-hd.mpg.de

Observing Large Scale Structures in the Gamma-Ray Sky

The High Altitude Water Cherenkov (HAWC) observatory in Mexico (4100 m .a.s.l.) has just finished its first year of data taking and produced some interesting results. Because of its wide field of view it is currently a unique detector to study extended sources (>2 degree) at energies above a few TeV. One of the largest structures in the gamma-ray sky are the so-called Fermi bubbles, extending to the North and South from the milky way centre. At energies around 1TeV, and above, the HAWC observatory is in a unique position to make observations (or constrain the flux) of the bubbles. From the results of HAWC, modelling of the bubbles with a focus on the energy range above 500 GeV and improving the HAWC event reconstruction, both energy accuracy and flux sensitivity are expected to improve.
There are currently studies ongoing to build a wide field of view gamma ray observatory (like HAWC) at the southern hemisphere. By performing monte-carlo simulations in order to optimise detector design and by going to higher altitudes and improved detector capabilities the goal is to achieve a sub-TeV wide field of view gamma ray observatory. This observatory would be in a unique position to observe transient events (Gamma Ray Bursts, Flaring Active galactic nuclei, Binary systems) through the monitoring of a large fraction of the sky on a daily basis and study large scale structures in the Southern Sky.

Supervisor: Jim Hinton (MPIK)

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