Core-collapse Model of Broadband Emission from SNR RX J1713.7–3946 with Thermal X-Rays and Gamma Rays from Escaping Cosmic Rays

We present a spherically symmetric, core-collapse model of SNR RX J1713.7--3946 that includes a hydrodynamic simulation of the remnant evolution coupled to the efficient production of cosmic rays (CRs) by nonlinear diffusive shock acceleration. High-energy CRs that escape from the forward shock (FS)...

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Bibliographic Details
Published in:The Astrophysical journal 2012-01, Vol.744 (1), p.39-jQuery1323898563005='46'
Main Authors: Ellison, Donald C, Slane, Patrick, Patnaude, Daniel J, Bykov, Andrei M
Format: Article
Language:English
Subjects:
ASTROPHYSICS
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
COMPUTERIZED SIMULATION
COSMIC RADIATION
ELECTRONS
GAMMA RADIATION
NONLINEAR PROBLEMS
PARTICLE DECAY
PIONS
SHOCK WAVES
SUPERNOVA REMNANTS
SYMMETRY
TEV RANGE
X RADIATION
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Summary:We present a spherically symmetric, core-collapse model of SNR RX J1713.7--3946 that includes a hydrodynamic simulation of the remnant evolution coupled to the efficient production of cosmic rays (CRs) by nonlinear diffusive shock acceleration. High-energy CRs that escape from the forward shock (FS) are propagated in surrounding dense material that simulates either a swept-up, pre-supernova shell or a nearby molecular cloud. The continuum emission from trapped and escaping CRs, along with the thermal X-ray emission from the shocked heated interstellar medium behind the FS, integrated over the remnant, is compared against broadband observations. Our results show conclusively that, overall, the GeV-TeV emission is dominated by inverse-Compton from CR electrons if the supernova is isolated regardless of its type, i.e., not interacting with a 100 M shell or cloud. If the supernova remnant is interacting with a much larger mass 104 M , pion decay from the escaping CRs may dominate the TeV emission, although a precise fit at high energy will depend on the still uncertain details of how the highest energy CRs are accelerated by, and escape from, the FS. Based on morphological and other constraints, we consider the 104 M pion-decay scenario highly unlikely for SNR RX J1713.7--3946 regardless of the details of CR escape. Importantly, even though CR electrons dominate the GeV-TeV emission, the efficient production of CR ions is an essential part of our leptonic model.
ISSN:0004-637X
1538-4357
DOI:10.1088/0004-637X/744/1/39