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arXiv · 1807.01300

Searching for an interstellar medium association for HESS J1534-571

Nigel I. Maxted·C. Braiding·G. F. Wong·G. P. Rowell·M. G. Burton·M. D. Filipovic·F. Voisin·D. Urosevic·B. Vukotic·M. Z. Pavlovic·H. Sano·Y. Fukui
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Abstract

The Galactic supernova remnant HESS J1534-571 (also known as G323.7-1.0) has a shell-like morphology in TeV gamma-ray emission and is a key object in the study of cosmic ray origin. Little is known about its distance and local environment. We examine Mopra $^{12}$CO/$^{13}$CO(1-0) data, Australian Telescope Compact Array HI, and Parkes HI data towards HESS J1534-571. We trace molecular clouds in at least five velocity ranges, including clumpy interstellar medium structures near a dip in HI emission at a kinematic velocity consistent with the Scutum-Crux arm at ~3.5 kpc. This feature may be a cavity blown-out by the progenitor star, a scenario that suggests HESS J1534-571 resulted from a core-collapse event. By employing parametrisations fitted to a sample of supernova remnants of known distance, we find that the radio continuum brightness of HESS J1534-571 is consistent with the ~3.5 kpc kinematic distance of the Scutum-Crux arm HI dip. Modelling of the supernova evolution suggests an ~8-24 kyr age for HESS J1534-571 at this distance.

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Nigel I. Maxted, C. Braiding, G. F. Wong, G. P. Rowell, M. G. Burton, M. D. Filipovic, F. Voisin, D. Urosevic, B. Vukotic, M. Z. Pavlovic, H. Sano, Y. Fukui. 2018-07-03. Searching for an interstellar medium association for HESS J1534-571. https://doi.org/10.1093/mnras%2Fsty1797

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