Astronomy and Astrophysics – Astronomy
Scientific paper
May 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...222..140s&link_type=abstract
Astrophysical Journal, Part 1, vol. 222, May 15, 1978, p. 140-152.
Astronomy and Astrophysics
Astronomy
31
Infrared Astronomy, Interstellar Gas, Interstellar Radiation, Limb Darkening, Nebulae, Brightness, Globules, Graphite, Interstellar Extinction, Optical Thickness, Ultraviolet Radiation
Scientific paper
Consideration is given to infrared radiation from dark globules heated by the interstellar radiation field. The individual effects of cloud parameters (including optical depth, grain type, and density inhomogeneity) on infrared surface brightness and the emergent spectrum are evaluated. The emergent flux for dark globules is noted to be smaller by a factor of ten than that of clouds with internal heat sources. The globule flux peaks at 310-550 microns for silicate clouds and at 100-130 microns for graphite clouds. Depending on optical depth, either limb brightening or limb darkening in the infrared can occur. Moderate-extinction globules manifest infrared limb brightening at grain-emission wavelengths. A second grain component significantly alters the emergent spectrum. Beam dilution and density inhomogeneities are noted to smooth out infrared limb brightening.
Leung Man Chun
Spencer R. G.
No associations
LandOfFree
Infrared radiation from dark globules 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 Infrared radiation from dark globules, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Infrared radiation from dark globules will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1296026