SIMBAD references

2002ApJ...575..240B - Astrophys. J., 575, 240-249 (2002/August-2)

Rocket observations of far-ultraviolet dust scattering in NGC 2023.


Abstract (from CDS):

The reflection nebula NGC 2023 was observed by a rocket-borne long-slit imaging spectrograph in the 900-1400 Å bandpass on 2000 February 11. A spectrum of the star, as well as that of the nebular scattered light, was recorded. Through the use of a Monte Carlo modeling process, the scattering properties of the dust were derived. The albedo is low, 0.2-0.4, and decreasing toward shorter wavelengths, while the phase function asymmetry parameter is consistent with highly forward-scattering grains, g∼0.85. The decrease in albedo, while the optical depth increases to shorter wavelengths, implies that the far-UV rise in the extinction curve is due to an increase in absorption efficiency.

Abstract Copyright:

Journal keyword(s): ISM: Dust, Extinction - ISM: Individual: NGC Number: NGC 2023 - ISM: Reflection Nebulae - Ultraviolet: ISM

Simbad objects: 12

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