Element Distributions In The Crab Nebula

Images of the Crab Nebula have been obtained through custom interference filters which transmit emission from the expanding supernova remnant in HI, HeI, HeII, [CI], [NII], [OI], [SII], and [SIII] emission lines. We present both raw and flux-calibrated data. Arrays of 19,440 photoionization models,...

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Bibliographic Details
Published in:arXiv.org 2012-05
Main Authors: Satterfield, T J, Katz, A M, Sibley, A R, MacAlpine, G M, Uomoto, A
Format: Article
Language:English
Subjects:
Abundance
Calibration
Carbon
Crab nebula
Emission
Helium
Nuclear fusion
Organic chemistry
Photoionization
Pixels
Space telescopes
Stellar evolution
Supernova remnants
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Summary:Images of the Crab Nebula have been obtained through custom interference filters which transmit emission from the expanding supernova remnant in HI, HeI, HeII, [CI], [NII], [OI], [SII], and [SIII] emission lines. We present both raw and flux-calibrated data. Arrays of 19,440 photoionization models, with extensive input abundance ranges, were matched pixel by pixel to the calibrated data in order to derive corresponding element abundance or mass-fraction distributions for helium, carbon, nitrogen, oxygen, and sulfur. These maps show distinctive structure, and they illustrate regions of gas in which various stages of nucleosynthesis have apparently occurred, including the CNO-cycle, helium-burning, carbon-burning, and oxygen-burning. It is hoped that the calibrated observations and chemical abundance distribution maps will be useful for developing a better understanding of the precursor star evolution and the supernova explosive process.
ISSN:2331-8422
DOI:10.48550/arxiv.1205.5737