DETECTION OF THE PULSAR WIND NEBULA HESS J1825-137 WITH THE FERMI LARGE AREA TELESCOPE

被引：49
|
作者：
Grondin, M. -H. [1 ]
Funk, S. [2 ,3 ]
Lemoine-Goumard, M. [1 ]
Van Etten, A. [2 ,3 ]
Hinton, J. A. [4 ]
Camilo, F. [5 ]
Cognard, I. [6 ,7 ]
Espinoza, C. M. [8 ]
Freire, P. C. C. [9 ]
Grove, J. E. [10 ]
Guillemot, L. [9 ]
Johnston, S. [11 ]
Kramer, M. [8 ,9 ]
Lande, J. [2 ,3 ]
Michelson, P. [2 ,3 ]
Possenti, A. [12 ]
Romani, R. W. [2 ,3 ]
Skilton, J. L. [13 ]
Theureau, G. [6 ,7 ]
Weltevrede, P. [8 ]
机构：
[1] Univ Bordeaux 1, Ctr Etud Nucl Bordeaux Gradignan, CNRS, IN2P3, F-33175 Gradignan, France
[2] Stanford Univ, Dept Phys, WW Hansen Expt Phys Lab, Kavli Inst Particle Astrophys & Cosmol, Stanford, CA 94305 USA
[3] Stanford Univ, SLAC Natl Accelerator Lab, Stanford, CA 94305 USA
[4] Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England
[5] Columbia Univ, Columbia Astrophys Lab, New York, NY 10027 USA
[6] CNRS, Lab Phys & Chim Environm, LPCE UMR 6115, F-45071 Orleans 02, France
[7] CNRS INSU, Observ Paris, Stn Radioastron Nancay, F-18330 Nancy, France
[8] Univ Manchester, Jodrell Bank Ctr Astrophys, Sch Phys & Astron, Manchester M13 9PL, Lancs, England
[9] Max Planck Inst Radioastron, D-53121 Bonn, Germany
[10] USN, Div Space Sci, Res Lab, Washington, DC 20375 USA
[11] CSIRO, Australia Telescope Natl Facil, Epping, NSW 1710, Australia
[12] INAF, Cagliari Astron Observ, I-09012 Capoterra, CA, Italy
[13] Univ Leeds, Sch Phys & Astron, Leeds LS2 9JT, W Yorkshire, England
来源：
ASTROPHYSICAL JOURNAL | 2011年 / 738卷 / 01期
基金：
英国科学技术设施理事会;
关键词：
gamma rays: general; ISM: individual objects (G18.0-0.7; HESS J1825-137); pulsars: general; pulsars: individual (PSR B1823-13; PSR J1826-1334); SPECTRAL EVOLUTION; MODEL; EMISSION; RAYS;
D O I：
10.1088/0004-637X/738/1/42
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
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 sigma = 0 degrees.56 +/- 0 degrees.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) x 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. 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.
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页数：7
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