Asymmetric Ejecta Distribution of the Cygnus Loop revealed with Suzaku

Understand

We observed a linearly sliced area of the Cygnus Loop from the north-east to the south-west with Suzaku in seven pointings.

• After dividing the entire fields of view (FOV) into 119 cells, we extracted spectra from all of the cells and performed spectral analysis for them.
• We then applied both one- and two-component non-equilibrium ionization (NEI) models for all of the spectra, finding that almost all were significantly better fitted by the two-component NEI model rather than the one-component NEI model.
• Judging from the abundances, the high-kT_e component must be the ejecta component, while the low-kT_e component comes from the swept-up matter.