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Title: Detection of the pulsar wind nebula HESS J1825-137 with the Fermi Large Area Telescope

Abstract

Here, we announce the discovery of 1-100 GeV gamma-ray emission from the archetypal TeV pulsar wind nebula (PWN) HESS J1825–137 using 20 months of survey data from the Fermi-Large Area Telescope (LAT). The gamma-ray emission detected by the LAT is significantly spatially extended, with a best-fit rms extension of σ = 0°.56 ± 0°.07 for an assumed Gaussian model. The 1-100 GeV LAT spectrum of this source is well described by a power law with a spectral index of 1.38 ± 0.12 ± 0.16 and an integral flux above 1 GeV of (6.50 ± 0.21 ± 3.90) × 10 –9 cm –2 s –1. The first errors represent the statistical errors on the fit parameters, while the second ones are the systematic uncertainties. Detailed morphological and spectral analyses bring new constraints on the energetics and magnetic field of the PWN system. As a result, the spatial extent and hard spectrum of the GeV emission are consistent with the picture of an inverse Compton origin of the GeV-TeV emission in a cooling-limited nebula powered by the pulsar PSR J1826–1334.

Authors:
 [1];  [2];  [3];  [2];  [4];  [5];  [6];  [7];  [8];  [9];  [8];  [10];  [11];  [2];  [2];  [12];  [2];  [13];  [6];  [7]
  1. Univ. Bordeaux, Gradignan (France); Univ. Tubingen, Tubingen (Germany)
  2. Stanford Univ., Stanford, CA (United States)
  3. Univ. Bordeaux, Gradignan (France)
  4. Univ. of Leicester, Leicester (United Kingdom)
  5. Columbia Univ., New York, NY (United States)
  6. Observatoire de Paris, Nancay (France)
  7. The Univ. of Manchester (United Kingdom)
  8. Max-Planck-Institut fur Radioastronomie, Bonn (Germany)
  9. Naval Research Lab., Washington, D.C. (United States)
  10. Australia Telescope National Facility, Epping, NSW (Australia)
  11. The Univ. of Manchester (United Kingdom); Max-Planck-Institut fur Radioastronomie, Bonn (Germany)
  12. INAF-Cagliari Astronomical Observatory, Capoterra (CA) (Italy)
  13. Univ. of Leeds, Leeds (United Kingdom)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1357202
Grant/Contract Number:  
AC02-76SF00515
Resource Type:
Accepted Manuscript
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 738; Journal Issue: 1; 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 (G18.0-0.7 HESS J1825–137); pulsars: general; pulsars: individual (PSR B1823-13 PSR J1826-1334)

Citation Formats

Grondin, M. -H., Funk, S., Lemoine-Goumard, M., Van Etten, A., Hinton, J. A., Camilo, F., Cognard, I., Espinoza, C. M., Freire, P. C. C., Grove, J. E., Guillemot, L., Johnston, S., Kramer, M., Lande, J., Michelson, P., Possenti, A., Romani, R. W., Skilton, J. L., Theureau, G., and Weltevrede, P. Detection of the pulsar wind nebula HESS J1825-137 with the Fermi Large Area Telescope. United States: N. p., 2011. Web. doi:10.1088/0004-637X/738/1/42.
Grondin, M. -H., Funk, S., Lemoine-Goumard, M., Van Etten, A., Hinton, J. A., Camilo, F., Cognard, I., Espinoza, C. M., Freire, P. C. C., Grove, J. E., Guillemot, L., Johnston, S., Kramer, M., Lande, J., Michelson, P., Possenti, A., Romani, R. W., Skilton, J. L., Theureau, G., & Weltevrede, P. Detection of the pulsar wind nebula HESS J1825-137 with the Fermi Large Area Telescope. United States. doi:10.1088/0004-637X/738/1/42.
Grondin, M. -H., Funk, S., Lemoine-Goumard, M., Van Etten, A., Hinton, J. A., Camilo, F., Cognard, I., Espinoza, C. M., Freire, P. C. C., Grove, J. E., Guillemot, L., Johnston, S., Kramer, M., Lande, J., Michelson, P., Possenti, A., Romani, R. W., Skilton, J. L., Theureau, G., and Weltevrede, P. Wed . "Detection of the pulsar wind nebula HESS J1825-137 with the Fermi Large Area Telescope". United States. doi:10.1088/0004-637X/738/1/42. https://www.osti.gov/servlets/purl/1357202.
@article{osti_1357202,
title = {Detection of the pulsar wind nebula HESS J1825-137 with the Fermi Large Area Telescope},
author = {Grondin, M. -H. and Funk, S. and Lemoine-Goumard, M. and Van Etten, A. and Hinton, J. A. and Camilo, F. and Cognard, I. and Espinoza, C. M. and Freire, P. C. C. and Grove, J. E. and Guillemot, L. and Johnston, S. and Kramer, M. and Lande, J. and Michelson, P. and Possenti, A. and Romani, R. W. and Skilton, J. L. and Theureau, G. and Weltevrede, P.},
abstractNote = {Here, we announce the discovery of 1-100 GeV gamma-ray emission from the archetypal TeV pulsar wind nebula (PWN) HESS J1825–137 using 20 months of survey data from the Fermi-Large Area Telescope (LAT). The gamma-ray emission detected by the LAT is significantly spatially extended, with a best-fit rms extension of σ = 0°.56 ± 0°.07 for an assumed Gaussian model. The 1-100 GeV LAT spectrum of this source is well described by a power law with a spectral index of 1.38 ± 0.12 ± 0.16 and an integral flux above 1 GeV of (6.50 ± 0.21 ± 3.90) × 10–9 cm–2 s–1. The first errors represent the statistical errors on the fit parameters, while the second ones are the systematic uncertainties. Detailed morphological and spectral analyses bring new constraints on the energetics and magnetic field of the PWN system. As a result, the spatial extent and hard spectrum of the GeV emission are consistent with the picture of an inverse Compton origin of the GeV-TeV emission in a cooling-limited nebula powered by the pulsar PSR J1826–1334.},
doi = {10.1088/0004-637X/738/1/42},
journal = {Astrophysical Journal},
number = 1,
volume = 738,
place = {United States},
year = {2011},
month = {8}
}

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