scholarly journals CANGAROO‐III Search for Gamma Rays from Kepler’s Supernova Remnant

2008 ◽  
Vol 683 (1) ◽  
pp. 383-388 ◽  
Author(s):  
R. Enomoto ◽  
Y. Higashi ◽  
T. Yoshida ◽  
T. Tanimori ◽  
G. V. Bicknell ◽  
...  
Keyword(s):  
Gamma Rays ◽  
Supernova Remnant

scholarly journals An extended source of GeV gamma rays coincident with the supernova remnant HB 21

2012 ◽  
Author(s):  
Ignasi Reichardt ◽  
Emma De Oña-Wilhelmi ◽  
Javier Rico ◽  
Rui-zhi Yang
Keyword(s):  
Gamma Rays ◽  
Supernova Remnant ◽  
Extended Source

scholarly journals An extended source of GeV gamma rays coincident with the supernova remnant HB 21

2012 ◽  
Vol 546 ◽  
pp. A21 ◽  
Author(s):  
I. Reichardt ◽  
E. de Oña-Wilhelmi ◽  
J. Rico ◽  
R. Yang
Keyword(s):  
Gamma Rays ◽  
Supernova Remnant ◽  
Extended Source

scholarly journals Particle propagation in clumpy supernova remnants

2019 ◽  
Vol 209 ◽  
pp. 01033
Author(s):  
Silvia Celli
Keyword(s):  
Gamma Rays ◽  
Supernova Remnants ◽  
Supernova Remnant ◽  
Gamma Ray ◽  
Numerical Study ◽  
Background Plasma ◽  
Strong Impact ◽  
Propagation Effects ◽  
Particle Propagation

The presence of dense clumps in the environment where a supernova remnant expands might have a strong impact in shaping the observed hadronic gamma-ray spectrum. A detailed numerical study about the penetration of relativistic protons into clumps which are engulfed by a supernova remnant shock is here presented, taking into account the magneto-hydrodynamical properties of the background plasma. This has strong implications for the formation of the spectrum of hadronic gamma rays, which does not reflect anymore the acceleration spectrum of protons, resulting substantially modified by propagation effects. A hadronic scenario including dense clumps inside the remnant shell is shown to adequately reproduce the broadband gamma-ray spectrum of the Galactic supernova remnant RX J1713-3946.7 from GeV to TeV energies.

scholarly journals A source of gamma rays coincident with the shell of the supernova remnant CTB 80

2021 ◽  
Vol 502 (1) ◽  
pp. 472-477
Author(s):  
M Araya ◽  
C Herrera
Keyword(s):  
Gamma Rays ◽  
Supernova Remnant ◽  
Gamma Ray ◽  
Cosmic Ray ◽  
High Energy ◽  
Large Area ◽  
Extended Source ◽  
X Ray ◽  
Extended Radio ◽  
High Energy Emission

ABSTRACT CTB 80 (G69.0+2.7) is a relatively old (50–80 kyr) supernova remnant (SNR) with a complex radio morphology showing three extended radio arms and a radio and X-ray nebula near the location of the pulsar PSR B1951+32. We report on a study of the GeV emission in the region of CTB 80 with Fermi-Large Area Telescope data. An extended source with a size of 1.3°, matching the size of the infrared shell associated to the SNR, was discovered. The GeV emission, detected up to an energy of ∼20 GeV, is more significant at the location of the northern radio arm where previous observations imply that the SNR shock is interacting with ambient material. Both hadronic and leptonic scenarios can reproduce the multiwavelength data reasonably well. The hadronic cosmic ray energy density required is considerably larger than the local Galactic value and the gamma-ray leptonic emission is mainly due to bremsstrahlung interactions. We conclude that GeV particles are still trapped or accelerated by the SNR producing the observed high-energy emission when interacting with ambient material.

scholarly journals Predictions for gamma-rays from clouds associated with supernova remnant PeVatrons

2021 ◽  
Author(s):  
Alison Mitchell ◽  
Gavin Rowell ◽  
Silvia Celli ◽  
Sabrina Einecke
Keyword(s):  
Gamma Rays ◽  
Supernova Remnant

scholarly journals The X-ray synchrotron nebula around PSR 1509-58

1996 ◽  
Vol 160 ◽  
pp. 351-352
Author(s):  
K.T.S. Brazier
Keyword(s):  
Gamma Rays ◽  
Supernova Remnant ◽  
X Rays ◽  
X Ray ◽  
Synchrotron Nebula

PSR 1509-58 is one of the youngest and most powerful pulsars known and is visible not only in soft X-rays, but in gamma-rays. Observations of its supernova remnant (MSH 15-52) offer a rare chance to study such a young pulsar and to explore its surroundings, which in X-rays include the pulsar’s 10×6 arcmin X-ray synchrotron nebula and the peculiar, filamentary optical nebula, RCW 89, that sits on the limb of MSH 15-52 (Seward & Harnden 1982, Seward et al. 1983). This paper will concentrate on the morphology of the synchrotron nebula.

scholarly journals Investigating the region of 3C 397 in High Energy Gamma rays

2017 ◽  
Vol 12 (S331) ◽  
pp. 316-319
Author(s):  
Pooja Bhattacharjee ◽  
Pratik Majumdar ◽  
Tulun Ergin ◽  
Lab Saha ◽  
Partha S. Joarder
Keyword(s):  
Gamma Rays ◽  
Supernova Remnant ◽  
Gamma Ray ◽  
High Energy ◽  
Large Area ◽  
High Energy Gamma ◽  
Excess Emission ◽  
Energy Gamma ◽  
Pulse Analysis ◽  
Radio Location

AbstractWe investigate the supernova remnant (SNR) 3C 397 and its neighboring pulsar PSR J1906+0722 in high energy gamma rays by using nearly six years of archival data of Large Area Telescope on board Fermi Gamma Ray Space Telescope (Fermi-LAT). The off-pulse analysis of gamma-ray flux from the location of PSR J1906+0722 reveals an excess emission which is found to be very close to the radio location of 3C 397. Here, we present the preliminary results of this gamma-ray analysis of 3C 397 and PSR J1906+0722.

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