Astronomy and Astrophysics – Astrophysics
Scientific paper
2002-06-18
Astrophys.J. 578 (2002) 109-113
Astronomy and Astrophysics
Astrophysics
13 pages, 4 figures. Accepted for publication in ApJ
Scientific paper
10.1086/342396
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 x 10^38 erg/s and a gas temperature of 2-8 x 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 HI observations have revealed an extended HI halo with anomalous velocities and a general inflow towards the central regions of the galaxy. This result and the present detection of a diffuse, hot X-ray emitting gas point at a very active disk-halo connection and galactic fountain types of phenomena.
Cappi Massimo
Fraternali Filippo
Oosterloo Tom
Sancisi Renzo
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