A Supernova Remnant Counterpart for HESS J1832-085

Maxted NI, Filipović MD, Hurley-Walker N, Bojičić I, Rowell GP, Haberl F, Ruiter AJ, Seitenzahl IR, Panther F, Wong GF, Braiding C, Burton M, Pühlhofer G, Sano H, Fukui Y, Sasaki M, Tian W, Su H, Cui X, Leahy D, Hancock PJ (2019)

Publication Type: Journal article

Publication year: 2019

Journal

Astrophysical Journal American Astronomical Society

Book Volume: 885

Article Number: 129

Journal Issue: 2

DOI: 10.3847/1538-4357/ab3e3f

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.

Authors with CRIS profile

Manami Sasaki Professur für Multiwellenlängenastronomie

Involved external institutions

Curtin University AU Australia (AU) University of Western Sydney AU Australia (AU) University of Adelaide AU Australia (AU) Max-Planck-Institut für extraterrestrische Physik (MPE) / Max Planck Institute for Extraterrestrial Physics DE Germany (DE) University of New South Wales (UNSW) AU Australia (AU) Armagh Observatory GB United Kingdom (GB) Nagoya University / 名古屋大学 JP Japan (JP) Eberhard Karls Universität Tübingen DE Germany (DE) National Astronomical Observatories, Chinese Academy of Sciences / 中国科学院国家天文台 (NAOC) CN China (CN) University of Calgary CA Canada (CA)

How to cite

APA:

Maxted, N.I., Filipović, M.D., Hurley-Walker, N., Bojičić, I., Rowell, G.P., Haberl, F.,... Hancock, P.J. (2019). A Supernova Remnant Counterpart for HESS J1832-085. Astrophysical Journal, 885(2). https://doi.org/10.3847/1538-4357/ab3e3f

MLA:

Maxted, Nigel I., et al. "A Supernova Remnant Counterpart for HESS J1832-085." Astrophysical Journal 885.2 (2019).

BibTeX: Download