Chandra discovery of ejecta-dominated X-ray emission from the old SNR candidate Sgr A East

Details Chandra discovery of ejecta-dominated X-ray emission from the old SNR candidate Sgr A East Chandra discovery of ejecta-dominated X-ray emission from the old SNR candidate Sgr A East

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aipc..565..177m&link_type=abstract

YOUNG SUPERNOVA REMNANTS: Eleventh Astrophysics Conference. AIP Conference Proceedings, Volume 565, pp. 177-180 (2001).

Astronomy and Astrophysics

Astrophysics

1

Supernova Remnants, Mass Loss And Stellar Winds, Supernovae

Scientific paper

We report on the X-ray emission from the shell-like, non-thermal radio source Sgr A East (SNR 000.0+00.0). The X-ray emitting region is concentrated within the central ~=2 pc of the larger radio shell. The spectrum shows strong Kα lines from highly ionized ions of S, Ar, Ca, and Fe. The plasma appears to be rich in heavy elements, over-abundant by roughly a factor of four with respect to solar abundances, and shows a spatial gradient of elemental abundance: the spatial distribution of iron is more compact than that of the lighter elements. The X-ray properties support the long-standing hypothesis that Sgr A East is an old supernova remnant (SNR). .

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