ICRC2015

Session

Parallel GA 04

30 Jul 2015, 14:00

World Forum

113. Re-examination of the Expected Gamma-Ray Emission of Supernova Remnant SN 1987A

Dr Leonid Ksenofontov (Yu.G. Shafer Institute of Cosmophysical Research and Aeronomy SB RAS)

30/07/2015, 14:00

GA-TH

Oral contribution

A nonlinear kinetic theory of cosmic ray (CR) acceleration in supernova remnants (SNRs) is employed to re-examine the nonthermal properties of the remnant of SN 1987A for an extended evolutionary period of 5-50 yr. This spherically symmetric model is approximately applied to the different features of the SNR which consist of a Blue Supergiant (BSG) wind and bubble, and the swept-up...

242. Search for gamma-ray emission from AGNs with ultra-fast-outflows as candidate cosmic-ray accelerators

Ms Yayoi Tomono (Tokai University)

30/07/2015, 14:15

GA-EX

Oral contribution

Recent X-ray observations of active galactic nuclei (AGNs) have revealed the widespread existence of ultra fast outflows (UFOs), i.e. powerful outflows of baryonic material with velocities $>$10,000 km s$^{-1}$($\sim$0.03 c), seen as variable, blueshifted absorption lines of ionized heavy elements. They have been interpreted as winds driven by the accretion disk, and may be responsible for...

1220. Flat Spectrum Radio Quasars through the MAGIC glasses

Josefa Becerra Gonzalez (NASA GSFC)

30/07/2015, 14:30

GA-EX

Oral contribution

The detection of Flat Spectrum Radio Quasars (FSRQs) in the Very High Energy (VHE, E>100 GeV) range is challenging, mainly because of their steep soft spectra in this energy band. Up to now only four FSRQs have been detected in VHE, three of them discovered by MAGIC. The gamma-ray observations observations at such high energies are crucial to understand their emission, especially to constrain...

1188. Origin of cosmic rays excess in the Galactic Center

Mrs Lea Jouvin (APC)

30/07/2015, 14:45

GA-TH

Oral contribution

The center of our Galaxy hosts a Super-Massive Black Hole (SMBH) of about $4 \times $ 10$^6$ M$_{sun}$. Since it has been argued that the SMBH might accelerate particles up to very high energies, its current and past activity could contribute to the population of Galactic cosmic-rays (CRs). Additionally, the condition in the Galactic Center (GC) are often compared with the one of a starburst...

736. Prospects for Measuring the Positron Excess with the Cherenkov Telescope Array

Prof. Justin Vandenbroucke (University of Wisconsin - Madison)

30/07/2015, 15:00

GA-EX

Oral contribution

The excess of positrons in cosmic rays above ∼10 GeV has been a puzzle since it was discovered. Possible interpretations of the excess include acceleration of positron secondaries in local supernova remnants or pulsars, or the annihilation or decay of dark matter particles. To distinguish between these interpretations, the measurement of the positron fraction must be extended to higher...