Open AccessFar‐ultraviolet scattering by dust in Orion
Author(s) -
Shalima P.,
Sujatha N. V.,
Murthy Jayant,
Henry Richard Conn,
Sahnow David J.
Publication year - 2006
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1111/j.1365-2966.2006.10071.x
Subject(s) - physics , orion nebula , starlight , milky way , astrophysics , stars , cosmic dust , astronomy , ultraviolet , reflection nebula , scattering , nebula , optics
We have modelled diffuse far‐ultraviolet (FUV) spectrum observed by the Far Ultraviolet Spectroscopic Explorer ( FUSE ) near M42 as the scattering of the starlight from the Trapezium stars by dust in front of the nebula. The dust grains are known to be anomalous in Orion with R V = 5.5 and these are the first measurements of the FUV optical properties of the grains outside of ‘normal’ Milky Way dust. We find an albedo varying from 0.3 ± 0.1 at 912 Å to 0.5 ± 0.2 at 1020 Å which is consistent with theoretical predictions.