Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995ap%26ss.224..473h&link_type=abstract
Astrophysics and Space Science, Volume 224, Issue 1-2, pp. 473-474
Astronomy and Astrophysics
Astrophysics
1
Ism: Carbon, Pdrs
Scientific paper
We have mapped the nuclear region of the starburst galaxy NGC 253 in the3 P 1 →3 P 0 line of neutral carbon using the JCMT. Carbon is widespread across the nuclear region with a similiar distribution to CO as expected. Previous studies of Galactic star-forming regions showed that carbon emission is enhanced in photon-dominated regions (where UV photons impinge upon molecular clouds). Previous observations of other PDR tracers such as ionized carbon and FIR continuum constrain the physical conditions in the PDR gas of NGC 253. The carbon we have observed is far brighter than predicted by theoretical models of PDRs with solar elemental values. This indicates that carbon emission is not a reliable diagnostic of the physical conditions in the nuclear region of a galaxy undergoing a burst of star formation.
Brand Peter
Harrison Andrew
Puxley Phil
Russell Adrian
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