Observation of [CII] 158 μm emission from the diffuse interstellar medium

Bock, J., Hristov, V. V., Mauskopf, Philip Daniel ORCID: https://orcid.org/0000-0001-6397-5516, Richards, P. L., Lange, A. E., Kawada, M., Matsuhara, H., Matsuura, S., Tanaka, M. and Matsumoto, T. 1992. Observation of [CII] 158 μm emission from the diffuse interstellar medium. Presented at: Back to the Galaxy, College Park, MD, 12−14 Oct 1992. Back to the Galaxy: College Park, MD, 1992 (AIP Conference Proceedings ). AIP Conference Proceedings , vol.278 Melville, NY: American Institute of Physics, pp. 299-302. 10.1063/1.43991

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Abstract

We report the first direct detection of 158 μm [CII] line emission from the diffuse interstellar medium at high galactic latitude. We measured the integrated line intensity in a 36' field-of-view along a triangular scan in a 5°×20° region in Ursa Major using a rocket-borne, liquid helium cooled spectrophotometer. The scans included high latitude infrared cirrus, molecular clouds, a bright external galaxy, M82, and the HI Hole, a region of uniquely low neutral hydrogen column density. Emission from [CII] is observed in all regions, and in the absence of CO emission it is well correlated with neutral hydrogen column density. We deduce a [CII] gas cooling rate of (2.6+/-0.6)×10-26 ergs s-1 H-atom-1, in good agreement with a recent observation of UV absorption lines at high galactic latitude.

Item Type:	Conference or Workshop Item (Paper)
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QB Astronomy
Publisher:	American Institute of Physics
ISBN:	9781563962271
ISSN:	0094-243X
Last Modified:	28 Oct 2022 08:29
URI:	https://orca.cardiff.ac.uk/id/eprint/70987

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