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  A supernova remnant counterpart for HESS J1832−085

Maxted, N. I., Filipović, M. D., Hurley-Walker, N., Bojičić, I., Rowell, G. P., Haberl, F., et al. (2019). A supernova remnant counterpart for HESS J1832−085. The Astrophysical Journal, 885(2): 129. doi:10.3847/1538-4357/ab3e3f.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0005-79BD-F Version Permalink: http://hdl.handle.net/21.11116/0000-0005-79BE-E
Genre: Journal Article

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 Creators:
Maxted, Nigel I., Author
Filipović, M. D., Author
Hurley-Walker, N., Author
Bojičić, I., Author
Rowell, G. P., Author
Haberl, F.1, Author              
Ruiter, A. J., Author
Seitenzahl, I. R., Author
Panther, F., Author
Wong, G. F., Author
Braiding, C., Author
Burton, M., Author
Pühlhofer, G., Author
Sano, H., Author
Fukui, Y., Author
Sasaki, M., Author
Tian, W., Author
Su, H., Author
Cui, X., Author
Leahy, D., Author
Hancock, P. J., Author more..
Affiliations:
1High Energy Astrophysics, MPI for Extraterrestrial Physics, Max Planck Society, ou_159890              

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 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.

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 Dates: 2019-11-07
 Publication Status: Published online
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 Identifiers: DOI: 10.3847/1538-4357/ab3e3f
Other: LOCALID: 3186701
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Title: The Astrophysical Journal
Source Genre: Journal
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Publ. Info: Bristol; Vienna : IOP Publishing; IAEA
Pages: - Volume / Issue: 885 (2) Sequence Number: 129 Start / End Page: - Identifier: ISSN: 0004-637X
CoNE: https://pure.mpg.de/cone/journals/resource/954922828215_3