Chandra observations of shock kinematics in supernova remnant 1987A

S. A. Zhekov; R. McCray; K. J. Borkowski; D. N. Burrows; S. Park

doi:10.1086/432794

Chandra observations of shock kinematics in supernova remnant 1987A

S. A. Zhekov, R. McCray, K. J. Borkowski, D. N. Burrows, S. Park

Astronomy & Astrophysics

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Abstract

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.

Original language	English (US)
Pages (from-to)	L127-L130
Journal	Astrophysical Journal
Volume	628
Issue number	2 II
DOIs	https://doi.org/10.1086/432794
State	Published - Aug 1 2005

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Astronomy and Astrophysics
Space and Planetary Science

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title = "Chandra observations of shock kinematics in supernova remnant 1987A",

abstract = "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.",

author = "Zhekov, {S. A.} and R. McCray and Borkowski, {K. J.} and Burrows, {D. N.} and S. Park",

note = "Funding Information: This work was supported by NASA through Chandra Awards G04-5072A (to CU, Boulder, CO) and GO4-5072B (to NCSU, Raleigh, NC). The authors appreciate the careful reading and comments by an anonymous referee.",

year = "2005",

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doi = "10.1086/432794",

language = "English (US)",

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T1 - Chandra observations of shock kinematics in supernova remnant 1987A

AU - Zhekov, S. A.

AU - McCray, R.

AU - Borkowski, K. J.

AU - Burrows, D. N.

AU - Park, S.

N1 - Funding Information: This work was supported by NASA through Chandra Awards G04-5072A (to CU, Boulder, CO) and GO4-5072B (to NCSU, Raleigh, NC). The authors appreciate the careful reading and comments by an anonymous referee.

PY - 2005/8/1

Y1 - 2005/8/1

N2 - 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.

AB - 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.

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JF - Astrophysical Journal

IS - 2 II

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Chandra observations of shock kinematics in supernova remnant 1987A

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