Chandra Observations of Shock Kinematics in Supernova Remnant 1987A

Details Chandra Observations of Shock Kinematics in Supernova Remnant 1987A Chandra Observations of Shock Kinematics in Supernova Remnant 1987A

2005-06-19

arxiv.org/abs/astro-ph/0506443v1

Astrophys.J.628:L127-L130,2005

Astronomy and Astrophysics

Astrophysics

12 pages, 3 figures, accepted for publication in ApJL

Scientific paper

10.1086/432794

We report the first results from deep X-ray observations of the SNR 1987A with the Chandra LETG. Temperatures inferred from line ratios range from 0.1 - 2 keV and increase with ionization potential. Expansion velocities inferred from X-ray line profiles range from 300 - 1700 km/s, 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.

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