12-16 September 2016
CERN
Europe/Zurich timezone
There is a live webcast for this event.

Galactic cosmic rays: Lesson from diffuse gamma-ray observations

15 Sep 2016, 17:00
15m
13/2-005 (CERN)

13/2-005

CERN

90
Show room on map
Oral Contributions Gamma-ray astrophysics Gamma-ray astrophysics

Speaker

Dr Carmelo Evoli (Gran Sasso Science Institute)

Description

Low-latitude Fermi-LAT data, together with the high resolution gas (CO & HI) and the dust opacity maps, has been recently exploited to study the radial emissivity of γ-rays induced by interactions of cosmic rays (CRs) with the interstellar medium along the Galactic Plane.
Both the absolute emissivity and the energy spectra of γ-rays exhibit significant variations along the galactic plane.
For the first time, models about the galactic distribution of CR factories, as well as about the CR propagation throughout the Galaxy, can be severely tested against not-local observations.
In this talk, we will show how the latest measurements pose constraints on the different CR source candidates and call for inhomogeneous transport conditions in the Galaxy.

Summary

Low-latitude Fermi-LAT data, together with the high resolution gas (CO & HI) and the dust opacity maps, has been recently exploited to study the radial emissivity of γ-rays induced by interactions of cosmic rays (CRs) with the interstellar medium along the Galactic Plane.
Both the absolute emissivity and the energy spectra of γ-rays exhibit significant variations along the galactic plane.
For the first time, models about the galactic distribution of CR factories, as well as about the CR propagation throughout the Galaxy, can be severely tested against not-local observations.
In this talk, we will show how the latest measurements pose constraints on the different CR source candidates and call for inhomogeneous transport conditions in the Galaxy.

Primary author

Dr Carmelo Evoli (Gran Sasso Science Institute)

Co-author

Prof. Felix Aharonian (Max-Planck-Institut f uer Kernphysik, Heidelberg, Germany)

Presentation Materials