TY - JOUR
T1 - Broadband X-Ray Spectroscopy of the Pulsar Wind Nebula in HESS J1640-465
AU - Abdelmaguid, Moaz
AU - Gelfand, Joseph D.
AU - Gotthelf, Eric
AU - Straal, Samayra
N1 - Funding Information:
The contributions of J.D.G. and S.M.S. were supported by NASA under grant number NNX17AL74G issued through the NNH16ZDA001N Astrophysics Data Analysis Program (ADAP). J.D.G. and S.H. are also supported by the NYU Abu Dhabi Research Enhancement Fund (REF) under grant RE022. The research of J.D.G. is also supported by NYU Abu Dhabi Grant AD022. The work of J.D.G. and S.M.S. is also supported by Tamkeen under the NYU Abu Dhabi Research Institute grant CAP. 3
Publisher Copyright:
© 2023. The Author(s). Published by the American Astronomical Society.
PY - 2023/3/1
Y1 - 2023/3/1
N2 - We present updated measurements of the X-ray properties of the pulsar wind nebula associated with the TeV γ-ray source HESS J1640-465 derived from Chandra and Nuclear Spectroscopic Telescope Array data. We report a high N H value along the line of sight, consistent with previous work, which led us to incorporate the effects of dust scattering in our spectral analysis. Due to uncertainties in the dust scattering, we report a range of values for the PWN properties (photon index and unabsorbed flux). In addition, we fit the broadband spectrum of this source and found evidence for spectral softening and decreasing unasborbed flux as we go to higher photon energies. We then used a one-zone time-dependent evolutionary model to reproduce the dynamical and multiwavelength spectral properties of our source. Our model suggests a short spin-down timescale, a relatively higher than average magnetized pulsar wind, a strong pulsar wind nebula magnetic field and maximum electron energy up to PeV, suggesting HESS J1640-465 could be a PeVatron candidate.
AB - We present updated measurements of the X-ray properties of the pulsar wind nebula associated with the TeV γ-ray source HESS J1640-465 derived from Chandra and Nuclear Spectroscopic Telescope Array data. We report a high N H value along the line of sight, consistent with previous work, which led us to incorporate the effects of dust scattering in our spectral analysis. Due to uncertainties in the dust scattering, we report a range of values for the PWN properties (photon index and unabsorbed flux). In addition, we fit the broadband spectrum of this source and found evidence for spectral softening and decreasing unasborbed flux as we go to higher photon energies. We then used a one-zone time-dependent evolutionary model to reproduce the dynamical and multiwavelength spectral properties of our source. Our model suggests a short spin-down timescale, a relatively higher than average magnetized pulsar wind, a strong pulsar wind nebula magnetic field and maximum electron energy up to PeV, suggesting HESS J1640-465 could be a PeVatron candidate.
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U2 - 10.3847/1538-4357/acbd30
DO - 10.3847/1538-4357/acbd30
M3 - Article
AN - SCOPUS:85151490141
SN - 0004-637X
VL - 946
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 1
M1 - 40
ER -