Fermi Detection Of The Pulsar Wind Nebula Hess J1640–465

Slane, P.; Castro, D.; Funk, S.; Uchiyama, Y.; Lemiere, A.; Gelfand, J. D.; Lemoine-Goumard, M.

doi:10.1088/0004-637X/720/1/266

Fermi Detection Of The Pulsar Wind Nebula Hess J1640–465

Journal Article · Mon Aug 09 00:00:00 EDT 2010 · The Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/720/1/266· OSTI ID:1357537

Slane, P. ^[1]; Castro, D. ^[2]; Funk, S. ^[3]; Uchiyama, Y. ^[3]; Lemiere, A. ^[4]; Gelfand, J. D. ^[5]; Lemoine-Goumard, M. ^[6]

Harvard-Smithsonian Center for Astrophysics, Cambridge, MA (United States)
Harvard-Smithsonian Center for Astrophysics, Cambridge, MA (United States); Univ. Simon Bolivar (Venezuela)
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Inst. de Physique Nucleaire (IPN), Orsay (France)
New York Univ. (NYU), NY (United States)
Univ. of Bordeaux, Gradignan (France)

We present observations of HESS J1640–465 with the Fermi-Large Area Telescope. The source is detected with high confidence as an emitter of high-energy gamma-rays. The spectrum lacks any evidence for the characteristic cutoff associated with emission from pulsars, indicating that the emission arises primarily from the pulsar wind nebula (PWN). Broadband modeling implies an evolved nebula with a low magnetic field resulting in a high γ-ray to X-ray flux ratio. The Fermi emission exceeds predictions of the broadband model, and has a steeper spectrum, possibly resulting from a distinct excess of low energy electrons similar to what is inferred for both the Vela X and Crab PWNe.

View Accepted Manuscript (DOE)

Research Organization:: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC02-76SF00515

OSTI ID:: 1357537

Alternate ID(s):: OSTI ID: 21460139

Journal Information:: The Astrophysical Journal, Journal Name: The Astrophysical Journal Journal Issue: 1 Vol. 720; ISSN 0004-637X

Publisher:: Institute of Physics (IOP)Copyright Statement

Country of Publication:: United States

Language:: English

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