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Paper: Local Enhancement of Ni Abundance in the Galactic Center X-ray Emission
Volume: 528, New Horizons in Galactic Center Astronomy and Beyond
Page: 455
Authors: Nobukawa, M.; Nobukawa, K. K.; Koyama, K.
Abstract: We discovered an enhancement of the Ni XXVII Heα emission in Sgr D region. In the case that the Ni enhancement is part of the Galactic center X-ray emission, the [Ni]/[Fe] ratio is obtained to be 5.2±2.2. Interestingly, the Ni-rich region is located in the direction of the Sgr D SNR. In the case that the Ni-enhancement is of the SNR origin, the [Ni]/[Fe] ratio is estimated to be 66±30. The Ni-rich plasma may be the ejecta erupted from Sgr D SNR.
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