A Caltech Library Service

Submillimeter CI and CO Lines in Galaxies

Gerin, Maryvonne and Phillips, Thomas G. (2001) Submillimeter CI and CO Lines in Galaxies. In: The Evolution of Galaxies I-Observational Clues. Springer Netherlands , Dordrecht, pp. 75-78. ISBN 9789048158218.

Full text is not posted in this repository. Consult Related URLs below.

Use this Persistent URL to link to this item:


Together with C^+ and CO, C is an important reservoir of carbon in the interstellar medium. We present recent results on the ground state transition of atomic carbon at 492 GHz, and on submillimeter CO lines in nearby galaxies. We show that atomic carbon is a good tracer of molecular gas in spiral galaxy disks. It has also a contribution to the molecular gas cooling: the cooling due to C and CO are of the same order of magnitude, and amounts typically to 4 × 10^(−5) of the FIR continuum. C and CO cooling becomes significant in ULIRG galaxies like Arp220. It is possible to use CI measurements to diagnose the physical conditions in galaxies. Together with CII/CI, the emissivity ratio CI/FIR can be used as a measure of the non-ionizing UV radiation field in galaxies.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Additional Information:© Springer Science+Business Media Dordrecht 2001. We are grateful to F. Boulanger and G. Lagache for helping us using the COBE/FIRAS data, and J. Le Bourlot, G. Pineau des Forêts and E. Roueff for the use of their PDR model. CSO is funded by NSF contract AST96-15025. M.G. acknowledges grants from INSU/CNRS, and NATO.
Funding AgencyGrant Number
NSFAST 96-15025
Institut national des sciences de l'Univers (INSU)UNSPECIFIED
Centre National de la Recherche Scientifique (CNRS)UNSPECIFIED
North Atlantic Treaty Organization (NATO)UNSPECIFIED
Subject Keywords:Galaxies; Interstellar medium; Submillimeter radio lines
Record Number:CaltechAUTHORS:20190826-124739498
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:98233
Deposited By: George Porter
Deposited On:26 Aug 2019 21:30
Last Modified:16 Nov 2021 17:37

Repository Staff Only: item control page