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The VELA-X-Pulsar Wind Nebula Revisited with Four Years of Fermi Large Area Telescope ObservationsThe Vela supernova remnant (SNR) is the closest SNR to Earth containing an active pulsar, the Vela pulsar (PSR B0833-45). This pulsar is an archetype of the middle-aged pulsar class and powers a bright pulsar wind nebula (PWN), Vela-X, spanning a region of 2deg × 3deg south of the pulsar and observed in the radio, X-ray, and very high energy γ-ray domains. The detection of the Vela-X PWN by the Fermi Large Area Telescope (LAT) was reported in the first year of the mission. Subsequently, we have reinvestigated this complex region and performed a detailed morphological and spectral analysis of this source using 4 yr of Fermi-LAT observations. This study lowers the threshold for morphological analysis of the nebula from 0.8 GeV to 0.3 GeV, allowing for the inspection of distinct energy bands by the LAT for the first time. We describe the recent results obtained on this PWN and discuss the origin of the newly detected spatial features.
Document ID
20140005685
Document Type
Reprint (Version printed in journal)
Authors
Grondin, M. -H. (Max-Planck-Inst. fuer Kernphysik Heidelberg, Germany)
Romani, R. W. (Kavli Inst. for Particle Astrophysics and Cosmology Stanford, CA, United States)
Lemoine-Goumard, M. (Bordeaux 1 Univ. Gradignan, France)
Guillemot, L. (Max-Planck-Inst. fuer Radioastronomie Bonn, Germany)
Harding, Alice K. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Reposeur, T. (Bordeaux 1 Univ. Gradignan, France)
Date Acquired
May 13, 2014
Publication Date
September 10, 2013
Publication Information
Publication: The Astrophysical Journal
Volume: 774
Issue: 110
Subject Category
Astrophysics
Report/Patent Number
GSFC-E-DAA-TN12733
Funding Number(s)
CONTRACT_GRANT: ERC-StG-259391
Distribution Limits
Public
Copyright
Public Use Permitted.
Keywords
Vela-X
PWN
ISM

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