GeV Gamma-Ray Emission from Pulsar Wind Nebula HESS J1356-645 with Fermi-Large Area Telescope

HESS J1356-645 is considered to be a pulsar wind nebula (PWN) associated with the pulsar PSR J1357-6429. We reanalyze the GeV gamma-ray emission in the direction of HESS J1356-645 with more than 13 yr of Fermi-Large Area Telescope data. The extended gamma-ray emission above 5 GeV is found to be spat...

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Veröffentlicht in:	The Astrophysical journal 2023-01, Vol.942 (2), p.105
Hauptverfasser:	Liu, Xi, Guo, Xiaolei, Xin, Yuliang, Zhu, Fengrong, Liu, Siming
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Sprache:	eng
Schlagworte:	Astrophysics Broadband Gamma emission Gamma rays Nebulae Power law Pulsar wind nebulae Pulsar winds Pulsars Stellar winds Wind
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description	HESS J1356-645 is considered to be a pulsar wind nebula (PWN) associated with the pulsar PSR J1357-6429. We reanalyze the GeV gamma-ray emission in the direction of HESS J1356-645 with more than 13 yr of Fermi-Large Area Telescope data. The extended gamma-ray emission above 5 GeV is found to be spatially coincident with HESS J1356-645. The spectrum in the energy range of 1 GeV–1 TeV can be described by a power law with an index of Γ = 1.51 ± 0.10. The broadband spectrum of HESS J1356-645 can be reproduced by a leptonic model with a broken power-law electronic spectrum. In addition, we found evidence that the morphology of the GeV emission from HESS J1356-645 varies with energy; a behavior that is similar to that of the PWN Vela-X. More broadband observations will be helpful to study the energy-dependent characteristics of HESS J1356-645.
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subjects	Astrophysics Broadband Gamma emission Gamma rays Nebulae Power law Pulsar wind nebulae Pulsar winds Pulsars Stellar winds Wind
title	GeV Gamma-Ray Emission from Pulsar Wind Nebula HESS J1356-645 with Fermi-Large Area Telescope
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