Hot gas haloes around disc galaxies: OVII column densities from galaxy formation simulations

• Published in: Monthly notices of the Royal Astronomical Society Vol. 409; no. 3; pp. 1049 - 1056
• Main Authors: NTORMOUSI, E, SOMMER-LARSEN, J
• Format: Journal Article
• Language: English
• Published: Malden, MA Wiley-Blackwell 11.12.2010; Oxford University Press
• Subjects: Astronomy; Density; Earth, ocean, space; Exact sciences and technology; Gases; Numerical analysis; Stars & galaxies; Galaxy halo; X-ray galaxies; Digital simulation; X-rays: galaxies; Disk galaxies; Cosmic x-ray sources; Luminosity; N body system; Column density; Galactic disks; Density distribution; Milky Way; galaxies: formation; Upper bound; Galaxy formation; Spiral galaxies; Hot gas; galaxies: spiral; X ray emission; galaxies: haloes

ABSTRACT Numerical models of disc galaxy formation predict the existence of extended, hot (T 106K) 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 fa...