Submillimetre line and continuum observations of the S255 molecular cloud

Details Submillimetre line and continuum observations of the S255 molecular cloud Submillimetre line and continuum observations of the S255 molecular cloud

Oct 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985mnras.216..713r&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 216, Oct. 1, 1985, p. 713-733. SERC-supported research.

Astronomy and Astrophysics

Astronomy

17

Continuous Spectra, Infrared Astronomy, Interstellar Matter, Millimeter Waves, Molecular Clouds, Submillimeter Waves, Astronomical Models, Gravitational Collapse, Line Spectra, Molecular Spectra, Radial Velocity, Radio Sources (Astronomy)

Scientific paper

The S255 molecular cloud has been observed using both continuum and spectral line techniques at several submillimetre and millimetre wavelengths. From photometry at 350, 760 and 1070 μm, the dust is estimated to have a central temperature of 44K and an emissivity which varies as λ-1. Spectral mapping of the source has been carried out in the CO J = 2-1, CO J = 3-2 and HCN J = 4-3 molecular lines, and central spectra obtained in the transitions HCO+ J = 4-3 and H13CO+ J = 4-3. Many features of the line observations can be modelled. Mapping at 350 μm has revealed an elongated central structure, also suggested by the HCN mapping, in which two clumps are separated by 1 arcmin along a north-south line. The intensity ratios between the pairs of transitions CO J = 3-2, CO J = 2-1 and HCO+ J = 4-3, H13CO+ J = 4-3, suggest that fragmentation has occurred in the cloud. An optically thin, high-velocity component is detected in the CO J = 3-2 line, for which a density of n(H2+He) ≡ 4 - 7×104cm-3 and a size of ≡0.7 arcmin are deduced. This component is hotter than the ambient cloud material and may originate from a high-velocity molecular outflow.

Affiliated with

Also associated with

No associations

Rating

Submillimetre line and continuum observations of the S255 molecular cloud 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 Submillimetre line and continuum observations of the S255 molecular cloud, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Submillimetre line and continuum observations of the S255 molecular cloud will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1547416