Details

Autor(en) / Beteiligte

• Maxted, Nigel I.
• Filipovi, M. D.
• Hurley-Walker, N.
• Boji i, 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.
• Hancock, P. J.

Titel

A Supernova Remnant Counterpart for HESS J1832−085

Ist Teil von

• The Astrophysical journal, 2019-11, Vol.885 (2), p.129

Ort / Verlag

Philadelphia: The American Astronomical Society

Erscheinungsjahr

2019

Link zum Volltext

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• 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.