2010/07/23 by Evangelia Ntormousi, Jesper Sommer‐Larsen, Jesper Sommer-Larsen · 5 citations
Physics and Astronomy · #Astronomy #Astrophysical Phenomena and Observations #Astrophysics #Astrophysics and Cosmic Phenomena #Barred spiral galaxy #Disc galaxy #Galaxies: Formation, Evolution, Phenomena #Galaxy #Galaxy formation and evolution #Galaxy merger #Galaxy rotation curve #Interacting galaxy #Lenticular galaxy #Luminosity #Physics #Type-cD galaxy #astro-ph.GA
paper · pdf · doi:10.1111/j.1365-2966.2010.17362.x
published in Monthly Notices of the Royal Astronomical Society 409(3), 1049-1056 (Oxford University Press) · accepted for publication in MNRAS
arxiv created 2010/07/23 · openalex publication_date 2010/08/27 · arxiv updated 2015/05/19 · openalex created_date 2021/02/01 · openalex updated_date 2026/08/05
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.