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|Title:||Searching for an interstellar medium association for HESS J1534-571|
|Citation:||Monthly Notices of the Royal Astronomical Society, 2018; 480(1):134-148|
|Publisher:||Oxford University Press|
|Nigel I. Maxted, C. Braiding, G. F. Wong, G. P. Rowell ... Gavin P. Rowell ... Fabien Voisin ... et al.|
|Abstract:||The Galactic supernova remnant HESSJ1534−571 (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 12CO/13CO(1–0) data, Australian Telescope Compact Array HI, and Parkes HI data towards HESSJ1534−571. 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 HESSJ1534−571 resulted from a core-collapse event. By employing parametrizations fitted to a sample of supernova remnants of known distance, we find that the radio continuum brightness of HESSJ1534−571 is consistent with the ∼3.5 kpc kinematic distance of the Scutum–Crux arm HI dip. Modelling of the supernova evolution suggests a ∼8–24 kyr age for HESSJ1534−571 at this distance.|
|Keywords:||Cosmic rays, ISM: molecules, ISM: supernova remnants, gamma-rays: ISM|
|Rights:||© 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society|
|Appears in Collections:||Physics publications|
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