Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...322..399h&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 322, Nov. 1, 1987, p. 399-402. Research supported by the University of Okla
Astronomy and Astrophysics
Astrophysics
11
Astronomical Spectroscopy, Crab Nebula, Forbidden Transitions, Infrared Spectra, Nickel, Supernova Remnants, Abundance, Electron Scattering, Emission Spectra, Metallicity
Scientific paper
Calculations have been performed for a 17-level Ni(+) ion over a range in Te and Ne representative of conditions found in gaseous nebulae in order to find additional observable forbidden Ni II emission lines which could be used to verify the assumption that the strong 7378-A line seen in numerous objects is primarily excited by electron-ion collisions. It is found that lines occurring at 1.19, 6.63 and 10.7 microns should range in strength from roughly 0.1 to several times that of 7378-A in an unreddened spectrum. Predicted strengths of these three lines relative to 7378-A are presented for five filament positions in the Crab Nebula plus one location in the supernova remnant IC 443. In addition, previously published data have been employed to estimate fluxes in these lines at each of these positions. A comparison to recently published infrared spectroscopic observations of IC 443 implies that these three forbidden Ni II infrared lines should be readily observable, assuming that 7378-A is collisionally produced.
No associations
LandOfFree
Predicted forbidden NI II infrared line strengths in the Crab Nebula and IC 443 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 Predicted forbidden NI II infrared line strengths in the Crab Nebula and IC 443, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Predicted forbidden NI II infrared line strengths in the Crab Nebula and IC 443 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1713347