A Cr-K emission line survey in young supernova remnants with Chandra
arXiv:0810.4687 · doi:10.1088/0004-637X/692/1/894
Abstract
We performed a Cr-K emission line survey in young supernova remnants (SNRs) with the Chandra archival data. Our sample includes W49B, Cas A, Tycho and Kepler. We confirmed the existence of the Cr line in W49B and discovered this emission line in the other three SNRs. The line center energies, equivalent widths (EWs) and fluxes of the Cr lines are given. The Cr in Cas A is in a high ionization state while that in Tycho and Kepler is in a much lower one. We find a good positive correlation between Cr and Fe line center energies, suggesting a common origin of Cr and Fe in the nucleosynthesis, which is consistent with the theoretical predictions. We propose that the EW ratio between Cr and Fe can be used as a supplementary constraint on the progenitors' properties and the explosion mechanism.
20 pages, 6 figures, accepted by ApJ
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- Suzaku X-Ray Imaging and Spectroscopy of Cassiopeia A
- Study of the many fluorescent lines and the absorption variability in GX 301-2 with XMM-Newton
- ALMA CO Observations of the Mixed-Morphology Supernova Remnant W49B: Efficient Production of Recombining Plasma and Hadronic Gamma-rays via Shock-Cloud Interactions
- Constraining The Single-Degenerate Channel of Type Ia Supernovae With Stable Iron-Group Elements in SNR 3C 397
- Cr-K Emission Line as a Constraint on the Progenitor Properties of Supernova Remnants
- A Sub-Solar Metallicity Progenitor for Cassiopeia A, the remnant of a Type IIb Supernova
- Spatially-Resolved Study of Recombining Plasma in W49B Using XMM-Newton