Far-infrared observations of M17SW - The clumpy structure of the photodissociation region

Details Far-infrared observations of M17SW - The clumpy structure of the photodissociation region Far-infrared observations of M17SW - The clumpy structure of the photodissociation region

May 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...390..499m&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 390, no. 2, May 10, 1992, p. 499-513. Research supported by Zonta Internati

Astronomy and Astrophysics

Astronomy

90

Far Infrared Radiation, H Ii Regions, Interstellar Chemistry, Interstellar Matter, Photodissociation, Astronomical Maps, Astronomical Models, Continuous Radiation, Infrared Astronomy, Line Spectra

Scientific paper

Forbidden O I 63-micron and forbidden Si II 35-micron fine-structure line emission in M17SW was mapped, and the intensities of the forbidden O I 63 and 146 microns, forbidden Si II 35 microns, and forbidden C II 158 microns were measured at four positions. New 50- and 100-micron continuum maps of the M17SW cloud at comparable resolution to the FIR line observations are presented. Analysis in terms of a homogeneous model yields an incident UV field of 56,000 habings, a density of 30,000 cu cm, and a temperature of about 300 K for the atomic gas. It is concluded that the M17SW photodissociation region is clumpy in nature. The observed forbidden Si II and high-J CO imply the presence of high-density clumps. The clumps dominate the emission in the forbidden O I, Si II, and high-level CO lines, while the forbidden C II, C I, and low-level CO arise mostly in the interclump gas. The extended (about 15 pc) forbidden C II and forbidden C I emission is attributed to the halo gas.

Affiliated with

Also associated with

No associations

Rating

Far-infrared observations of M17SW - The clumpy structure of the photodissociation region 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 Far-infrared observations of M17SW - The clumpy structure of the photodissociation region, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Far-infrared observations of M17SW - The clumpy structure of the photodissociation region will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1514566