Computer Science – Sound
Scientific paper
May 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21442403m&link_type=abstract
American Astronomical Society, AAS Meeting #214, #424.03; Bulletin of the American Astronomical Society, Vol. 41, p.693
Computer Science
Sound
Scientific paper
The Spectrograph for Photometric Imaging with Numeric Reconstruction (SPINR) sounding rocket recorded spectral imaging data of the far-ultraviolet (912-1450Å) scattered light distribution towards the Orion constellation. These observations can be used to study the scattering properties of interstellar dust grains in Orion by way of constraining the DIRTY radiative transfer model (Gordon, K.D., ApJ 551:269-276, 2001) to best-fit values of the dust albedo (a) and asymmetry parameter (g). Previous determinations of the FUV scattering albedo for dust grains in reflection nebulae show a sharp discontinuity at 1400Å, over which the dust albedo changes by a factor of two (Gordon, K. D., ASPCS Vol. 309, 2004). This 1400Å feature is not reproduced by any dust grain model. We will present the development of a three dimensional Orion dust model and the subsequent determinations of (a) and (g) using the SPINR Orion data. The determined albedos span the 1400Å discontinuity and show further evidence of its existence. This work was supported in part by NASA grant NAG5-960.
Chakrabarti Sangeeta
Cook Theodore Andrea
Lewis Nikole K.
Mendillo Christopher
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