The interstellar medium of galaxies as seen through images of the 158 μm [CII] line

Details The interstellar medium of galaxies as seen through images of the 158 μm [CII] line The interstellar medium of galaxies as seen through images of the 158 μm [CII] line

Mar 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994inpht..35..311m&link_type=abstract

Infrared Physics & Technology, Volume 35, Issue 2-3, p. 311-319.

Physics

7

Scientific paper

FIR [CII] images of galaxies have been made using the MPE/UCB Far-Infrared Fabry-Perot Imaging Spectrometer (FIFI) on the KAO with 55'' resolution. The 158 μm cooling line of ionized carbon shows emission extended over very large scales: peaking in the nucleus and present at least out to the extent of the spiral arms as seen in the CO(1-0) line in the galaxies NGC6946, M83, NGC891 and Centaurus A and often beyond the molecular disks. Evidence for photodissociation of molecular gas over kpc scales in the spiral arms is seen in the nearly face-on galaxies M83 and NGC6946. The [CII] emission present in the disk beyond the extent of molecular gas can be produced in the diffuse HI gas, thereby allowing us to derive properties of the atomic medium, such as temperatures and pressures.

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