The [CII] and [OI] emission lines in NGC6946 and NGC1313

Authors
Contursi, A Brauher, J Helou, G
Citation
A. Contursi et al., The [CII] and [OI] emission lines in NGC6946 and NGC1313, ASTRO SP SC, 277, 2001, pp. 59-62
Citations number
6
Categorie Soggetti
Space Sciences
Journal title
ASTROPHYSICS AND SPACE SCIENCE
ISSN journal
0004640X → ACNP
Volume
277
Year of publication
2001
Supplement
1
Pages
59 - 62
Database
ISI
SICI code
0004-640X(2001)277:<59:T[A[EL>2.0.ZU;2-Q
Abstract
The [CII (158 mum)] fine structure line, which is the principal cooling lin e of the atomic gas, in two nearby galaxies observed with LWS on board ISO is compared to dust and HI gas emission and heating intensity. The relation between photoelectric effect on different grains populations, dust and gas heating found for a sample of 60 normal galaxies for which global [CII] me asurements are available, still holds on scale of similar to1.5 kpc. We als o succeed in detecting cooling from a low density diffuse atomic gas associ ated with the diffuse optical disk in both galaxies, accounting typically f or similar to 30-40% of the total [CII] emission.