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arXiv · 2108.00557

NuSTAR broad-band X-ray observational campaign of energetic pulsar wind nebulae in synergy with VERITAS, HAWC and Fermi gamma-ray telescopes

Kaya Mori·Hongjun An·Daniel Burgess·Massimo Capasso·Brenda Dingus·Joseph Gelfand·Charles Hailey·Brian Humensky·Kelly Malone·Reshmi Mukherjee·Nahee Park·Isaac Pope·Stephen Reynolds·Samar Safi-Harb·Jooyun Woo·Galactic TeV source collaboration
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Abstract

We report recent progress on the on-going NuSTAR observational campaign of 8 TeV-detected pulsar wind nebulae (PWNe). This campaign constitutes a major part of our NuSTAR study of some of the most energetic TeV sources in our Galaxy detected by VERITAS and HAWC. NuSTAR is the first focusing X-ray telescope operating above 10 keV in space with sub-arcminute angular resolution. Broad-band X-ray imaging and spectroscopy data, obtained by NuSTAR, allow us to probe sub-PeV electron populations through detecting synchrotron X-ray radiation. Our targets include PeVatron candidates detected by HAWC, the Boomerang nebula, PWNe crushed by supernova remnant shocks (or relic PWNe) and G0.9+0.1 in the Galactic Center. Using Fermi-LAT data and available TeV data, we aim to provide a complete, multi-wavelength view of a diverse class of middle-aged (~10-100 kyrs old) PWNe. Our NuSTAR analysis detected hard X-ray emission from the Eel and Boomerang PWNe and characterized their broad-band X-ray spectra most accurately. We plan to apply both time-evolution and multi-zone PWN models to multi-wavelength spectral energy distribution (SED) data over the radio, X-ray, GeV and TeV bands. In this proceeding, we will review our observational campaign and discuss the preliminary results for some PWNe.

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Kaya Mori, Hongjun An, Daniel Burgess, Massimo Capasso, Brenda Dingus, Joseph Gelfand, Charles Hailey, Brian Humensky, Kelly Malone, Reshmi Mukherjee, Nahee Park, Isaac Pope, Stephen Reynolds, Samar Safi-Harb, Jooyun Woo, Galactic TeV source collaboration. 2021-08-01. NuSTAR broad-band X-ray observational campaign of energetic pulsar wind nebulae in synergy with VERITAS, HAWC and Fermi gamma-ray telescopes. https://arxiv.org/abs/2108.00557

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