The far-ultraviolet dust albedo in the Upper Scorpius subgroup of the Scorpius OB2 association

Details The far-ultraviolet dust albedo in the Upper Scorpius subgroup of the Scorpius OB2 association The far-ultraviolet dust albedo in the Upper Scorpius subgroup of the Scorpius OB2 association

Sep 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...432..641g&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 432, no. 2, p. 641-647

Astronomy and Astrophysics

Astronomy

36

Albedo, Cosmic Dust, Monte Carlo Method, Reflection Nebulae, Scorpius Constellation, Stellar Spectra, Ultraviolet Radiation, Astronomical Models, Radiative Heat Transfer, Ultraviolet Astronomy

Scientific paper

During NRL's Far Ultraviolet Cameras experiment on STS-39, four images of the giant reflection nebula encompassing the Upper Scorpius subgroup of the Sco OB2 association were obtained in two ultraviolet bandpasses with lambdaeff = 1362 A and 1769 A. From these images and IUE and TD-1 stellar spectra, the ratio of nebular to stellar flux was calculated. The ratio ranged from 0.577 to 0.921 at 1362 A and 0.681 to 0.916 at 1769 A with the spread in the ratio arising mainly from uncertainties in the sky background. In order to analyze these images, a model utilizing Monte Carlo techniques to describe radiative transfer in a spherical nebula with asymmetrically distributed stars was developed by elaborating on previous work by Witt. This model was used to determine the range of albedos reproducing the observed nebular-to-stellar flux ratios while allowing the scattering phase function asymmetry to vary between 0.0 and 0.8. The resulting albedos were 0.47-0.70 at 1362 A and 0.55-0.72 at 1769 A.

Affiliated with

Also associated with

No associations

Rating

The far-ultraviolet dust albedo in the Upper Scorpius subgroup of the Scorpius OB2 association 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 The far-ultraviolet dust albedo in the Upper Scorpius subgroup of the Scorpius OB2 association, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The far-ultraviolet dust albedo in the Upper Scorpius subgroup of the Scorpius OB2 association will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1788122