Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-08-03
Astronomy and Astrophysics
Astrophysics
32 pages, 5 figures
Scientific paper
The near UV spectra of OB stars in our galaxy are often dominated by a very broad extinction band peaking at ~2175 Angstroms. Forty years after its discovery, the origin of this band remains unknown, although interstellar dust particles are generally assumed to be the carriers. Here we report that two-photon absorption by hydrogen molecules in gaseous clouds enveloping OB stars can lead to a band peaking at ~2175 Angstroms. We present astronomical spectral evidence supporting our proposal that this nonlinear absorption mechanism accounts for the lambda2175 feature.
Glownia James H.
Sorokin Peter P.
No associations
LandOfFree
Two-Photon Absorption by Hydrogen Molecules: Origin of the 2175 Angstrom Astronomical Band? 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 Two-Photon Absorption by Hydrogen Molecules: Origin of the 2175 Angstrom Astronomical Band?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Two-Photon Absorption by Hydrogen Molecules: Origin of the 2175 Angstrom Astronomical Band? will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-49599