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Title: The Vela-X pulsar wind nebula revisited with four years of Fermi Large Area Telescope observations

Abstract

Here, the 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 2° × 3° 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.

Authors:
 [1];  [2];  [3];  [4];  [5];  [3]
  1. Max-Planck-Institut fur Kernphysik, Heidelberg (Germany); Univ. de Toulouse, Toulouse (France)
  2. Stanford Univ., Stanford, CA (United States). SLAC National Accelerator Lab.
  3. Centre d'Etudes Nucleaires de Bordeaux Gradignan, Gradignan (France)
  4. Max-Planck-Institut fur Radioastronomie, Bonn (Germany)
  5. NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1356565
Grant/Contract Number:  
AC02-76SF00515
Resource Type:
Accepted Manuscript
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 774; Journal Issue: 2; Journal ID: ISSN 0004-637X
Publisher:
Institute of Physics (IOP)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; gamma rays: general; ISM: individual objects (Vela-X); pulsars: general; pulsars: individual (Vela PSR J0835–4510)

Citation Formats

Grondin, M. -H., Romani, R. W., Lemoine-Goumard, M., Guillemot, L., Harding, A. K., and Reposeur, T. The Vela-X pulsar wind nebula revisited with four years of Fermi Large Area Telescope observations. United States: N. p., 2013. Web. doi:10.1088/0004-637X/774/2/110.
Grondin, M. -H., Romani, R. W., Lemoine-Goumard, M., Guillemot, L., Harding, A. K., & Reposeur, T. The Vela-X pulsar wind nebula revisited with four years of Fermi Large Area Telescope observations. United States. doi:10.1088/0004-637X/774/2/110.
Grondin, M. -H., Romani, R. W., Lemoine-Goumard, M., Guillemot, L., Harding, A. K., and Reposeur, T. Wed . "The Vela-X pulsar wind nebula revisited with four years of Fermi Large Area Telescope observations". United States. doi:10.1088/0004-637X/774/2/110. https://www.osti.gov/servlets/purl/1356565.
@article{osti_1356565,
title = {The Vela-X pulsar wind nebula revisited with four years of Fermi Large Area Telescope observations},
author = {Grondin, M. -H. and Romani, R. W. and Lemoine-Goumard, M. and Guillemot, L. and Harding, A. K. and Reposeur, T.},
abstractNote = {Here, the 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 2° × 3° 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.},
doi = {10.1088/0004-637X/774/2/110},
journal = {Astrophysical Journal},
number = 2,
volume = 774,
place = {United States},
year = {2013},
month = {8}
}

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