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https://hdl.handle.net/2440/122815
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Type: | Journal article |
Title: | A Supernova Remnant Counterpart for HESS J1832-085 |
Author: | Maxted, N.I. Filipović, M.D. Hurley-Walker, N. Bojičić, I. Rowell, G.P. Haberl, F. Ruiter, A.J. Seitenzahl, I.R. Panther, F. Wong, G.F. Braiding, C. Burton, M. Pühlhofer, G. Sano, H. Fukui, Y. Sasaki, M. Tian, W. Su, H. Cui, X. Leahy, D. et al. |
Citation: | The Astrophysical Journal: an international review of astronomy and astronomical physics, 2019; 885(2):1-17 |
Publisher: | American Astronomical Society |
Issue Date: | 2019 |
ISSN: | 0004-637X 1538-4357 |
Statement of Responsibility: | Nigel I. Maxted, M. D. Filipović, N. Hurley-Walker, I. Bojičić, G. P. Rowell, F. Haberl ... et al. |
Abstract: | We examine the new Galactic supernova remnant (SNR) candidate, G23.11+0.18, as seen by the Murchison Widefield Array radio telescope. We describe the morphology of the candidate and find a spectral index of −0.63 ± 0.05 in the 70–170 MHz domain. Coincident TeV gamma-ray detection in High Energy Stereoscopic System (HESS) data supports the SNR nature of G23.11+0.18 and suggests that G23.11+0.18 is accelerating particles beyond TeV energies, thus making this object a promising new cosmic-ray hadron source candidate. The remnant cannot be seen in current optical, infrared and X-ray data sets. We do find, however, a dip in CO-traced molecular gas at a line-of-sight velocity of ~85 km s−1, suggesting the existence of a G23.11+0.18 progenitor wind-blown bubble. Furthermore, the discovery of molecular gas clumps at a neighboring velocity toward HESS J1832−085 adheres to the notion that a hadronic gamma-ray production mechanism is plausible toward the north of the remnant. Based on these morphological arguments, we propose an interstellar medium association for G23.11+0.18 at a kinematic distance of 4.6 ± 0.8 kpc. |
Rights: | © 2019. The American Astronomical Society. All rights reserved. |
DOI: | 10.3847/1538-4357/ab3e3f |
Grant ID: | http://purl.org/au-research/grants/arc/FT170100243 http://purl.org/au-research/grants/arc/FT160100028 |
Published version: | http://dx.doi.org/10.3847/1538-4357/ab3e3f |
Appears in Collections: | Aurora harvest 4 Physics publications |
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