Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apj...452..685b&link_type=abstract
Astrophysical Journal v.452, p.685
Astronomy and Astrophysics
Astronomy
15
Ism: Dust, Extinction, Ism: H Ii Regions, Infrared: Ism: Continuum, Ism: Individual Name: Orion Nebula
Scientific paper
We examine the nebular extinction in the Orion Nebula using a combination of new near-infrared (1.2-2.4 μm) and previously published optical (0.34-1.0 μm) spectrophotometry. Using the emission lines of the H i Balmer, Paschen, and Brackett recombination series, and assuming case B recombination and the stellar extinction law, we obtain discrepant estimates of the total extinction, AV, in which the derived AV increases with the wavelength of the series being considered. This discrepancy is inconsistent with expected small deviations from case B recombination theory. We suggest instead that it is mostly a consequence of optical effects due to the complex distribution of gas and dust in the nebula. We derive a empirical effective nebular extinction law for the ionized hydrogen zone of the nebula and use this extinction law to deredden the observed emission-line ratios to assess the impact of our nebular extinction treatment on dust-sensitive emission-line diagnostics of temperature and ionic abundances.
Bautista Manuel A.
DePoy Darren L.
Pogge Richard W.
No associations
LandOfFree
The Nebular Extinction in the Orion Nebula 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 Nebular Extinction in the Orion Nebula, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Nebular Extinction in the Orion Nebula will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1352933