[seminar] (DANAS 29.5.2018., 14:00, F-25) High and very-high energy emission from Gamma-Ray Bursts

[Mihael Makek]

Poštovane kolegice i kolege,

podsjećam i na drugi današnji seminar koji će održati dr. Lara Nava sa
INAF Research Centre: Osservatorio Astronomico di Brera, Osservatorio
Astronomico di Trieste, pod nazivom:

High and very-high energy emission from Gamma-Ray Bursts

Mjesto: Fizički odsjek, F-25
Vrijeme: utorak, 29. 5. 2018. u 14h

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Dear colleagues,

I kindly remind you about the second seminar today by dr. Lara Nava (INAF
Research Centre: Osservatorio Astronomico di Brera, Osservatorio
Astronomico di Trieste) with the title:

High and very-high energy emission from Gamma-Ray Bursts

Location: Department of Physics, F-25
Time: 14h on Tuesday, May 29th, 2018


ABSTRACT:
The physical origin of the temporally extended (>100 seconds) high-energy
emission (0.1-100 GeV) detected from Gamma-Ray Bursts (GRB) by the
Fermi/LAT instrument has not been completely understood. The temporal and
spectral properties of this long lasting emission are providing increasing
evidence in favour of an external shock scenario, where the radiation is
produced by electrons accelerated at the relativistic shock developed in
interactions between the jet and the external medium. In this talk, I will
give an overview of the state-of-the-art of GRB observations at GeV and
TeV energies and discuss the potential of such observations in improving
our still poor understanding of processes producing radiation in
relativistic jets. Prospects for GRB detections with the upcoming CTA
observatory will also be discussed, with particular emphasis on their
fundamental role in revealing the nature of mechanisms powering GRB
radiation.

Srdačno,
M. Makek







----SEMINAR ABSTRACT--------------------------------------------------

I shall review the results obtained in recent years in the experimental
studies of exotic atoms, in particular in kaonic atoms, and present the
future perspectives.
I shall mostly focus on the studies of kaonic atoms performed at the DAFNE
collider of LNF-INFN and at KEK in Japan, which have produced a valuable
wealth of data which are used by theoreticians to better understand the
QCD in non-perturbative sector, with implications going from particle and
nuclear physics to astrophysics. I shall also discuss the development of
new X-ray detectors, such as Silicon Drift Detectors and Charge Coupled
Devices which allowed toperform precision measurements of kaonic hydrogen
and kaonic helium.
I shall present future perspectives, including ongoing programs, as
SIDDHARTA-2 at DAFNE and E57 and E62 at J-PARC, as well as plans to
measure sigmonic atoms transitions and to perform dedicated measurements
of selected kaonic atoms to solve the "charged kaon mass inconsistency".
Kaonic atoms studies represents a unique opportunity to unlock the secrets
of the QCD in the low-energy regime and to disentangle the role of
strangeness in astrophysics and cosmology.

Srdačno,
Mihael Makek