XMM-Newton observation of the TeV-discovered supernova remnant HESS J1534-571
Nguyen-Dang NT, Pühlhofer G, Sasaki M, Bamba A, Doroshenko V, Santangelo A (2023)
Publication Type: Journal article
Publication year: 2023
Journal
Book Volume: 679
Article Number: A48
DOI: 10.1051/0004-6361/202346448
Abstract
We report the results obtained from XMM-Newton observations of the TeV-detected supernova remnant (SNR) HESS J1534-571. We focus on the nature of the cosmic-ray particle content in the SNR, which is revealed by its γ-ray emission. No signatures of X-ray synchrotron emission were detected from the SNR. This is consistent with earlier results obtained with Suzaku from other regions of the object. A joint modeling of the XMM-Newton and Suzaku spectra yields an upper limit for the total X-ray flux from the SNR area of ∼5.62 × 10-13 erg cm-2 s-1 (95% C.I.) in the energy band of 2.0-10.0 keV for an assumed photon index of 2.0. On the other hand, we do find evidence in the XMM-Newton data for a line-like emission feature at 6.4 keV from localized regions, again confirming earlier Suzaku measurements. We discuss the findings in the context of the origin of the observed γ-ray emission. Although neither hadronic nor leptonic scenarios can be fully ruled out, the observed line emission can be interpreted as the result of interactions between lower-energy (∼ MeV) cosmic-ray protons with high gas-density regions in and around HESS J1534-571, and thus potentially be associated with particles accelerated in the SNR.
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Germany (DE)
Japan (JP)How to cite
APA:
Nguyen-Dang, N.T., Pühlhofer, G., Sasaki, M., Bamba, A., Doroshenko, V., & Santangelo, A. (2023). XMM-Newton observation of the TeV-discovered supernova remnant HESS J1534-571. Astronomy & Astrophysics, 679. https://dx.doi.org/10.1051/0004-6361/202346448
MLA:
Nguyen-Dang, N. T., et al. "XMM-Newton observation of the TeV-discovered supernova remnant HESS J1534-571." Astronomy & Astrophysics 679 (2023).
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