SIMBAD references

2014ApJ...789..131H - Astrophys. J., 789, 131 (2014/July-2)

Detection of ultraviolet halos around highly inclined galaxies.


Abstract (from CDS):

We report the discovery of diffuse ultraviolet light around late-type galaxies out to 5-20 kpc from the midplane using Swift and GALEX images. The emission is consistent with the stellar outskirts in the early-type galaxies but not in the late-type galaxies, where the emission is quite blue and consistent with a reflection nebula powered by light escaping from the galaxy and scattering off dust in the halo. Our results agree with expectations from halo dust discovered in extinction by Ménard et al. to within a few kpc of the disk and imply a comparable amount of hot and cold gas in galaxy halos (a fewx 108 M within 20 kpc) if the dust resides primarily in Mg II absorbers. The results also highlight the potential of UV photometry to study individual galaxy halos.

Abstract Copyright:

Journal keyword(s): dust, extinction - galaxies: halos - ultraviolet: galaxies

Simbad objects: 42

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