Searching for an interstellar medium association for HESS J1534 - 571

N. I. Maxted, C. Braiding, G. F. Wong, G. P. Rowell, M. G. Burton, M. D. Filipović, F. Voisin, D. Urošević, B. Vukotić, M. Z. Pavlović, H. Sano, Y. Fukui

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

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 12CO/13CO(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 parametrizations 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 a ~8-24 kyr age for HESS J1534-571 at this distance.
Original languageEnglish
Pages (from-to)134-148
Number of pages15
JournalMonthly Notices of the Royal Astronomical Society
Volume480
Issue number1
DOIs
Publication statusPublished - 2018

Keywords

  • cosmic rays
  • gamma rays
  • interstellar matter
  • supernova remnants

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