Estimating the Oxygen Ejecta Mass in E0102-72

Details Estimating the Oxygen Ejecta Mass in E0102-72 Estimating the Oxygen Ejecta Mass in E0102-72

May 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003head....7.1023f&link_type=abstract

American Astronomical Society, HEAD meeting #7, #10.23; Bulletin of the American Astronomical Society, Vol. 35, p.864

Astronomy and Astrophysics

Astrophysics

Scientific paper

The Chandra HETGS observation of SNR E0102-72 in the SMC provided flux measurements of individual emission lines of oxygen, neon, magnesium and silicon. Ratios of these line fluxes provide diagnostic information of the emitting plasma (insofar as integrated measurements are appropriate). Using this technique, a best-fit plasma model for oxygen was obtained. Assuming a pure metal plasma consisting of O, Ne, Si and Mg, we estimate the electron density and calculate the mass of oxygen which gives rise to the measured line flux. The results from the best-fit oxygen plasma model yield an ejecta mass of ˜6 solar masses, consistent with a massive progenitor of ˜30 solar masses. We briefly discuss the importance of several assumptions which go into this estimate of ejecta mass.
This work was supported by NASA through contract NAS8-01129 and by the Smithsonian Astrophysical Observatory (SAO) contract SVI-61010 for the Chandra X-Ray Center (CXC).

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