Simulation Study of Dust-scattered Far-ultraviolet Emission in the Orion-Eridanus Superbubble
Abstract
We present the results of dust scattering simulations carried out for the Orion-Eridanus Superbubble region by comparing them with observations made in the far-ultraviolet. The albedo and the phase function asymmetry factor (g-factor) of interstellar grains were estimated, as were the distance and thickness of the dust layers. The results are as follows: 0.43+0.02 - 0.04 for the albedo and 0.45+0.2 - 0.2 for the g-factor, in good agreement with previous determinations and theoretical predictions. The distance of the assumed single dust layer, modeled for the Orion Molecular Cloud Complex, was estimated to be ~110 pc and the thickness ranged from ~130 at the core to ~50 pc at the boundary for the region of present interest, implying that the dust cloud is located in front of the superbubble. The simulation result also indicates that a thin (~10 pc) dust shell surrounds the inner X-ray cavities of hot gas at a distance of ~70-90 pc.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- September 2012
- DOI:
- 10.1088/0004-637X/756/1/38
- arXiv:
- arXiv:1207.2249
- Bibcode:
- 2012ApJ...756...38J
- Keywords:
-
- dust;
- extinction;
- ISM: bubbles;
- ISM: individual objects: Orion-Eridanus;
- ISM: structure;
- ultraviolet: ISM;
- Astrophysics - Astrophysics of Galaxies
- E-Print:
- 7 pages, 5 figures, 1 table