Warm Dense Gas in High Latitude Clouds - Multiline Co/ and NH3 Observations of MBM:32

Details Warm Dense Gas in High Latitude Clouds - Multiline Co/ and NH3 Observations of MBM:32 Warm Dense Gas in High Latitude Clouds - Multiline Co/ and NH3 Observations of MBM:32

Sep 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...276l...5s&link_type=abstract

Astronomy and Astrophysics, Vol.276, NO. 1/SEPI, P. L5, 1993

Astronomy and Astrophysics

Astrophysics

8

Interstellar Medium: Clouds - Interstellar Medium: Individual Objects: Mbm32 - Radio Lines: Molecular: Interstellar

Scientific paper

We present the results of a multiline CO and NH3 study of a molecular condensation in MI3M32. These observations give dear evidence that the gas in this high latitude cloud is unexpectedly warm and dense. The dump was selected from a complete map in 12CO(1→0) and subsequently observed in six other 12CO, 13CO, and C18O transitions and in the NH3 (1,1) and (2,2) transitions. We present the first detection of the 13CO(3→2) and NH3 (2,2) lines in a high latitude cloud. For the core we derive from the NH3 data a kinetic temperature of 24+10-5K The CO data could not be fitted applying the usually adopted LVG or escape propability models which assume constant excitation conditions for the whole cloud. We applied a spherically symmetric radiative transfer code, which allows radial variation of e.g. density and kinetic temperature. The CO data can best be modelled by a cloud with a beam averaged column density of 1.8 1020 cm-2 and a power law density distribution with an exponent α = 0.25 increasing inwards from 160 cm-3 at the cloud radius R = 0.24pc. The kinetic temperature increases from about 40 K in the core to about 53 K in the outer shell.

Affiliated with

Also associated with

No associations

Rating

Warm Dense Gas in High Latitude Clouds - Multiline Co/ and NH3 Observations of MBM:32 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Warm Dense Gas in High Latitude Clouds - Multiline Co/ and NH3 Observations of MBM:32, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Warm Dense Gas in High Latitude Clouds - Multiline Co/ and NH3 Observations of MBM:32 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1558906