SIMBAD references

2023MNRAS.524.4212S - Mon. Not. R. Astron. Soc., 524, 4212-4218 (2023/September-3)

On the Hα faintness of the North Polar Spur.

SOFUE Y., KATAOKA J. and IWASHITA R.

Abstract (from CDS):

The ratio of Hα intensity to 1.4-GHz radio continuum intensity in the North Polar Spur (NPS) is measured to be ≲ 50, two orders of magnitude smaller than the values of ∼104 observed in the typical shell-type old supernova remnants of the Cygnus Loop and S147. The extremely low Hα-to-radio intensity ratio favours the Galactic Centre explosion model for the NPS, which postulates a giant shock wave at a distance of several kiloparsecs in the hot and low-density Galactic halo with a low hydrogen recombination rate, over the local supernova(e) remnant model.

Abstract Copyright: © 2023 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society.

Journal keyword(s): shock waves - ISM: bubbles - ISM: individual objects: (North Polar Spur) - Galaxy: centre - galaxies: individual: (the Milky Way)

Simbad objects: 11

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