2002/06/18 by Filippo Fraternali, M. Cappi, Massimo Cappi +3 · 1 citation
Physics and Astronomy · #Astronomy #Astrophysical Phenomena and Observations #Astrophysics #Galactic halo #Galaxies: Formation, Evolution, Phenomena #Galaxy #Halo #Lenticular galaxy #Luminosity #Physics #Spiral galaxy #Star formation #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.1086/342396
published as Astrophys.J. 578 (2002) 109-113 · 13 pages, 4 figures. Accepted for publication in ApJ
arxiv created 2002/06/18 · openalex publication_date 2002/10/08 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/06
We have detected diffuse soft X-ray emission (0.4-1 keV) from the disk of the spiral galaxy NGC 2403 with Chandra . This diffuse emission [with a total luminosity of 2.1 × 10 38 ergs s -1 and a gas temperature of (2-8) × 10 6 K] is well separated from the numerous bright point sources. NGC 2403 is a luminous spiral galaxy with a high rate of star formation. Recent H I observations have revealed an extended H I halo with anomalous velocities and a general inflow toward the central regions of the galaxy. This result and the present detection of a diffuse, hot X-ray-emitting gas point to a very active disk-halo connection and galactic fountain types of phenomena.