SIMBAD references

2015ApJ...799L..10S - Astrophys. J., 799, L10 (2015/January-3)

Axial ratio of edge-on spiral galaxies as a test for bright radio halos.

SINGAL J., KOGUT A., JONES E. and DUNLAP H.

Abstract (from CDS):

We use surface brightness contour maps of nearby edge-on spiral galaxies to determine whether extended bright radio halos are common. In particular, we test a recent model of the spatial structure of the diffuse radio continuum by Subrahmanyan & Cowsik which posits that a substantial fraction of the observed high-latitude surface brightness originates from an extended Galactic halo of uniform emissivity. Measurements of the axial ratio of emission contours within a sample of normal spiral galaxies at 1500 MHz and below show no evidence for such a bright, extended radio halo. Either the Galaxy is atypical compared to nearby quiescent spirals or the bulk of the observed high-latitude emission does not originate from this type of extended halo.

Abstract Copyright:

Journal keyword(s): Galaxy: halo - radio continuum: galaxies

Simbad objects: 17

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2021.02.26-23:56:16

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