The Expansion of the Forward Shock of 1E 0102.2-7219 in X-rays

Abstract

We measure the expansion of the forward shock of the Small Magellanic Cloud supernova remnant 1E\,0102.2-7219 in X-rays using Chandra X-Ray Observatory on-axis Advanced CCD Imaging Spectromete(ACIS) observations from 1999-2016. We estimate an expansion rate of 0.025%\pm0.006%yr^{-1} and a blast-wave velocity of 1.61\pm0.37\times10^3 km s^{-1}. Assuming partial electron-ion equilibration via Coulomb collisions and cooling due to adiabatic expansion, this velocity implies a postshock electron temperature of 0.84\pm0.20 keV which is consistent with the estimate of 0.68\pm0.05 keV based on the X-ray spectral analysis. We combine the expansion rate with the blast wave and reverse shock radii to generate a grid of one-dimensional models for a range of ejecta masses (2-6 \msol) to constrain the explosion energy, age, circumstellar density, swept-up mass, and unshocked-ejecta mass. We find acceptable solutions for a constant density ambient medium and for an r^{-2} power-law profile (appropriate for a constant progenitor stellar wind). For the constant density case, we find an age of \sim 1700 yr, explosion energies 0.87-2.61\times10^{51} erg, ambient densities 0.85-2.54 amu cm^{-3}, swept-up masses 22-66 \msol, and unshocked-ejecta masses 0.05-0.16 \msol. For the power-law density profile, we find an age of \sim 2600 yr, explosion energies 0.34-1.02\times10^{51} erg, densities 0.22-0.66 amu cm^{-3} at the blast wave, swept-up masses 17-52 \msol, and unshocked-ejecta masses 0.06-0.18 \msol. Assuming the true explosion energy was 0.5-1.5\times10^{51} erg, ejecta masses 2-3.5 \msol are favored for the constant density case and 3-6 \msol for the power-law case. The unshocked-ejecta mass estimates are comparable to Fe masses expected in core-collapse supernovae with progenitor mass 15.0-40.0 \msol, offering a possible explanation for the lack of Fe emission observed in X-rays.

References in corpus (26)

• Core-Collapse Supernovae from 9 to 120 Solar Masses Based on Neutrino-powered Explosions
• Mass Loss: Its Effect on the Evolution and Fate of High-Mass Stars
• An Overview of the Performance and Scientific Results from the Chandra X-Ray Observatory (CXO)
• Nucleosynthesis Yields of Core-Collapse Supernovae and Hypernovae, and Galactic Chemical Evolution
• The Expulsion of Stellar Envelopes in Core-Collapse Supernovae
• Chandra X-Ray Observatory (CXO):Overview
• Nucleosynthesis in Type II Supernovae
• A Chandra X-ray Survey of Ejecta in the Cassiopeia A Supernova Remnant
• The Progenitor Masses of Wolf-Rayet Stars and Luminous Blue Variables Determined from Cluster Turn-offs. I. Results from 19 OB Associations in the Magellanic Clouds
• On the Determination of Ejecta Structure and Explosion Asymmetry from the X-ray Knots of Cassiopeia A
• Electron Heating and Cosmic Rays at a Supernova Shock from Chandra X-ray Observations of E0102.2-7219
• Chandra/ACIS Subpixel Event Repositioning. II. Further Refinements and Comparison between Backside and Front-side Illuminated X-ray CCDs
• Dust Destruction by the Reverse Shock in the Cassiopeia A Supernova Remnant
• The Slow X-Ray Expansion of the Northwestern Rim of the Supernova Remnant RX J0852.0-4622
• The Kinematics of Kepler's Supernova Remnant as revealed by Chandra
• Chandra High-Resolution X-Ray Spectrum of Supernova Remnant 1E0102.2-7219
• Chandra X-ray Observatory Arcsecond Imaging of the Young, Oxygen-rich Supernova Remnant 1E0102.2-7219
• SNR 1E 0102.2-7219 as an X-ray Calibration Standard in the 0.5-1.0 keV Bandpass and Its Application to the CCD Instruments aboard Chandra, Suzaku, Swift and XMM-Newton
• Optical Structure and Proper-Motion Age of the Oxygen-rich Supernova Remnant 1E 0102-7219 in the Small Magellanic Cloud
• The Flight Spectral Response of the ACIS Instrument
• A Comparison of X-ray and Optical Emission in Cassiopeia A
• The Refined Shock Velocity of the X-Ray Filaments in the RCW 86 Northeast Rim
• [Fe XIV] and [Fe XI] reveal the forward shock in SNR 1E0102.2-7219
• The Expansion of the Young Supernova Remnant 0509-68.7 (N103B)
• A Detailed Archival CHANDRA Study of the Young Core-Collapse Supernova Remnant 1E 0102.2-7219 in the Small Magellanic Cloud
• An X-ray upper limit on the presence of a Neutron Star for the Small Magellanic Cloud and Supernova Remnant 1E0102.2-7219

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• A Grid of Core-Collapse Supernova Remnant Models I: The Effect of Wind-Driven Mass-Loss
• The Center of Expansion and Age of the Oxygen-rich Supernova Remnant 1E 0102.2-7219
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• On the X-ray Properties of the Putative Central Compact Object in 1E 0102.2-7219
• Spitzer and Herschel studies of dust in supernova remnants in the Small Magellanic Cloud
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