SIMBAD references

2018MNRAS.474..662M - Mon. Not. R. Astron. Soc., 474, 662-676 (2018/February-2)

Probing the local environment of the supernova remnant HESS J1731-347 with CO and CS observations.

MAXTED N., BURTON M., BRAIDING C., ROWELL G., SANO H., VOISIN F., CAPASSO M., PUHLHOFER G. and FUKUI Y.

Abstract (from CDS):

The shell-type supernova remnant HESS J1731 - 347 emits TeV gamma-rays, and is a key object for the study of the cosmic ray acceleration potential of supernova remnants. We use 0.5-1 arcmin Mopra CO/CS(1-0) data in conjunction with H I data to calculate column densities towards the HESS J1731 - 347 region. We trace gas within at least four Galactic arms, typically tracing total (atomic+molecular) line-of-sight H column densities of 2-3x 1022 cm–2. Assuming standard X-factor values and that most of the H I/CO emission seen towards HESS J1731 - 347 is on the near-side of the Galaxy, X-ray absorption column densities are consistent with H I+CO-derived column densities foreground to, but not beyond, the Scutum-Crux Galactic arm, suggesting a kinematic distance of ∼3.2 kpc for HESS J1731 - 347. At this kinematic distance, we also find dense, infrared-dark gas traced by CS(1-0) emission coincident with the north of HESS J1731 - 347, the nearby H II region G353.43-0.37 and the nearby unidentified gamma-ray source HESS J1729 - 345. This dense gas lends weight to the idea that HESS J1729 - 345 and HESS J1731 - 347 are connected, perhaps via escaping cosmic-rays.

Abstract Copyright: © 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): cosmic rays - ISM: clouds - ISM: supernova remnants - gamma-rays: ISM

Simbad objects: 23

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2019.09.17-17:28:03

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