High-Resolution X-ray Spectroscopy of SNR 1987A: Chandra LETG and HETG Observations in 2007
arXiv:0810.5313 · doi:10.1088/0004-637X/692/2/1190
Abstract
We present an extended analysis of the deep Chandra LETG and HETG observations of the supernova remnant 1987A (SNR 1987A) carried out in 2007. The global fits to the grating spectra show that the temperature of the X-ray emitting plasma in the slower shocks in this system has remained stable for the last three years, while that in the faster shocks has decreased. This temperature evolution is confirmed by the first light curves of strong X-ray emission lines and their ratios. On the other hand, bulk gas velocities inferred from the X-ray line profiles are too low to account for the post-shock plasma temperatures inferred from spectral fits. This suggests that the X-ray emission comes from gas that has been shocked twice, first by the blast wave and again by shocks reflected from the inner ring of SNR 1987A. A new model that takes these considerations into account gives support to this physical picture.
36 pages, 10 figures, Accepted for publication in ApJ
References in corpus (16)
- SN 1987A After 18 Years: Mid-Infrared GEMINI and SPITZER Observations of the Remnant
- Monitoring the Evolution of the X-ray Remnant of SN 1987A
- Modelling the Hubble Space Telescope Ultraviolet and Optical Spectrum of Spot 1 on the Circumstellar Ring of SN 1987A
- Infrared and X-Ray Evidence for Circumstellar Grain Destruction by the Blast Wave of Supernova 1987A
- The X-ray Spectrum of Supernova Remnant 1987A
- A Chandra View of The Morphological And Spectral Evolution of Supernova Remnant 1987A
- Evolution and Geometry of Hot Spots in Supernova Remnant 1987A
- Supernova Remnant 1987A: Opening the Future by Reaching the Past
- Evolutionary Status of SNR 1987A at the Age of Eighteen
- Chandra LETG Observations of Supernova Remnant 1987A
- High Resolution mid-Infrared Imaging of SN 1987A
- XMM-Newton observations of SN1987A
- Chandra HETG Spectra of SN 1987A at 20 years
- Chandra Observations of Shock Kinematics in Supernova Remnant 1987A
- Probing Elemental Abundances in SNR 1987A Using XMM-Newton
- Chandra Observations of Supernova 1987A
Cited by in corpus (37)
- Supernova remnants: the X-ray perspective
- Dust Production and Particle Acceleration in Supernova 1987A Revealed with ALMA
- Electron-Ion Temperature Equilibration in Collisionless Shocks: the Supernova Remnant-Solar Wind Connection
- Supernova 1987A: a Template to Link Supernovae to their Remnants
- Chandra Observes the End of an Era SN 1987A
- Multi-frequency Radio Measurements of SN 1987A over 22 Years
- Abundances and density structure of the inner circumstellar ring around SN 1987A
- Hydrodynamic simulations unravel the progenitor-supernova-remnant connection in SN 1987A
- Five Years of Mid-Infrared Evolution of the Remnant of SN 1987A: The Encounter Between the Blast Wave and the Dusty Equatorial Ring
- Spectral and morphological analysis of the remnant of Supernova 1987A with ALMA & ATCA
- 3D MHD modeling of the expanding remnant of SN 1987A. Role of magnetic field and non-thermal radio emission
- Collisionless shock heating of heavy ions in SN 1987A
- Bursting SN 1996cr's Bubble: Hydrodynamic and X-ray Modeling of its Circumstellar Medium
- Chandra observations of SN 1987A: the soft X-ray light curve revisited
- X-ray Evolution of SNR 1987A: The Radial Expansion
- Evolution of the Radio Remnant of Supernova 1987A: Morphological Changes from Day 7000
- Indication of a Pulsar Wind Nebula in the hard X-ray emission from SN 1987A
- Evolution of the Chandra CCD Spectra of SNR 1987A: Probing the Reflected-Shock Picture
- High Resolution X-Ray Spectroscopy of SN 1987A: Monitoring with XMM-Newton
- The First Decade of Science with Chandra and XMM-Newton
- Thermal Emission and Radioactive Lines, but No Pulsar, in the Broadband X-Ray Spectrum of Supernova 1987A
- Additional evidence for a pulsar wind nebula in the heart of SN 1987A from multi-epoch X-ray data and MHD modeling
- XMM-Newton Observations Reveal Very High X-ray Luminosity from the Carbon-rich Wolf-Rayet Star WR 48a
- The remnant of Supernova 1987A resolved at 3 mm wavelength
- A New Evolutionary Phase of Supernova Remnant 1987A
- Chandra HETG Observations of the Colliding Stellar Wind System WR 147
- The Post-impact Evolution of the X-ray Emitting Gas in SNR 1987A Viewed by XMM-Newton
- Spectral Evolution of the X-Ray Remnant of SN 1987A: A High-Resolution HETG Study
- SN 1987A : Tracing the flux decline and spectral evolution through a comparison of SRG/eROSITA and XMM-Newton observations
- Suzaku Observations of the Prototype Wind-Blown Bubble NGC 6888
- X-Ray and Gamma-Ray Emission From Core-collapse Supernovae: Comparison of Three-dimensional Neutrino-driven Explosions With SN 1987A
- High Resolution X-ray Imaging of Supernova Remnant 1987A
- Latest Evolution of the X-Ray Remnant of SN 1987A: Beyond the Inner Ring
- High-cadence Dispersed Spectral Analysis of Supernova Remnant 1987A
- The Exceptional X-ray Evolution of SN1996cr in High Resolution
- Tracing the ejecta structure of SN 1987A: Insights and diagnostics from 3D MHD simulations
- Unusual X-ray Oxygen Line Ratios of SN 1987A Arising From the Absorption of Galactic Hot Interstellar Medium