2010MNRAS.409.1049N

Query : 2010MNRAS.409.1049N

2010MNRAS.409.1049N - Mon. Not. R. Astron. Soc., 409, 1049-1056 (2010/December-2)

Hot gas haloes around disc galaxies: O VII column densities from galaxy formation simulations.

NTORMOUSI E. and SOMMER-LARSEN J.

Abstract (from CDS):

Numerical models of disc galaxy formation predict the existence of extended, hot (T∼ 106 K) gas haloes around present-day spirals. The X-ray luminosity of these haloes is predicted to increase strongly with galaxy mass. However, searches for their X-ray emission have not been successful so far.

We calculate the all-sky O VII column density distributions for the haloes of three Milky Way like disc galaxies, resulting from cosmological high-resolution, N-body/gasdynamical simulations. We perform calculations both including the disc gas and without it, so the disc contribution to the column density is quantified. It is found that the column densities estimated for Milky Way like galaxies are just below the observational upper limit, making a test of the hot halo paradigm likely within observational reach.


Abstract Copyright: 2010 The Authors. Journal compilation2010 RAS

Journal keyword(s): galaxies: formation - galaxies: haloes - galaxies: spiral - X-rays: galaxies

Simbad objects: 5

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Number of rows : 5
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NAME Magellanic Stream HVC 00 32 -30.0           ~ 1079 1
2 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
3 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
4 NGC 5746 GiP 14 44 56.005 +01 57 17.06   12.3       ~ 375 0
5 NAME Local Group GrG ~ ~           ~ 9325 0

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