We report the first results from deep X-ray observations of the supernova remnant SNR 1987A with the Chandra LETG. Temperatures inferred from line ratios range from ∼0.1 to 2 keV and increase with ionization potential. Expansion velocities inferred from X-ray line profiles range from ∼300 to 1700 km s-1, much less than the velocities inferred from the radial expansion of the radio and X-ray images. We can account for these observations with a scenario in which the X-rays are emitted by shocks produced where the supernova blast wave strikes dense protrusions of the inner circumstellar ring, which are also responsible for the optical hot spots.
All Science Journal Classification (ASJC) codes
- Astronomy and Astrophysics
- Space and Planetary Science