Time Variability of Nonthermal X-ray Stripes in Tycho's Supernova Remnant with Chandra

Abstract

Analyzing Chandra data of Tycho's supernova remnant (SNR) taken in 2000, 2003, 2007, 2009, and 2015, we search for time variable features of synchrotron X-rays in the southwestern part of the SNR, where stripe structures of hard X-ray emission were previous found. By comparing X-ray images obtained at each epoch, we discover a knot-like structure in the northernmost part of the stripe region became brighter particularly in 2015. We also find a bright filamentary structure gradually became fainter and narrower as it moved outward. Our spectral analysis reveal that not only the nonthermal X-ray flux but also the photon indices of the knot-like structure change from year to year. During the period from 2000 to 2015, the small knot shows brightening of $\sim 70\%$ and hardening of $\Delta \Gamma \sim 0.45$. The time variability can be explained if the magnetic field is amplified to $\sim 100\mu \mathrm{G}$ and/or if magnetic turbulence significantly changes with time.

arXiv comment8 pages, 3 figures, 2 tables, accepted for publication in ApJ

References in corpus (31)

• On the Absorption of X-rays in the Interstellar Medium
• Updated Atomic Data and Calculations for X-ray Spectroscopy
• A Spatial and Spectral Study of Nonthermal Filaments in Historical Supernova Remnants: Observational Results with Chandra
• Toward Understanding the Cosmic-ray Acceleration at Young Supernova Remnants Interacting with Interstellar Clouds: Possible Applications to RX J1713.7-3946
• Analytical solutions for energy spectra of electrons accelerated by nonrelativistic shock-waves in shell type supernova remnants
• Tycho Brahe's 1572 supernova as a standard type Ia explosion revealed from its light echo spectrum
• Nonthermal Radiation of Young Supernova Remnants
• Non linear particle acceleration at non-relativistic shock waves in the presence of self-generated turbulence
• Diffusive Shock Acceleration with Magnetic Amplification by Non-resonant Streaming Instability in SNRs
• The blast wave of Tycho's supernova remnant
• Fast Variability of Nonthermal X-Ray Emission in Cassiopeia A: Probing Electron Acceleration in Reverse-Shocked Ejecta
• Expansion Velocity of Ejecta in Tycho's Supernova Remnant Measured by Doppler Broadened X-ray Line Emission
• X-Ray Measured Dynamics of Tycho's Supernova Remnant
• Evidence For Particle Acceleration to the Knee of the Cosmic Ray Spectrum in Tycho's Supernova Remnant
• Dots, clumps and filaments: the intermittent images of synchrotron emission in random magnetic fields of young supernova remnants
• Gamma-ray observations of Tycho's SNR with VERITAS and Fermi
• Tycho Brahe's supernova: light from centuries past
• Tycho SN 1572: A Naked Ia Supernova Remnant without Associated Ambient Molecular Cloud
• Expanding molecular bubble surrounding Tycho's supernova remnant (SN 1572) observed with IRAM 30 m telescope: evidence for a single-degenerate progenitor
• Supernova remnants in clumpy media: particle propagation and gamma-ray emission
• A detailed study of non-thermal X-ray properties and interstellar gas toward the γ-ray supernova remnant RX J1713.7-3946
• The environment of Tycho: possible interaction with molecular cloud
• X-ray Stripes in Tycho's Supernova Remant: Synchrotron Footprints of a Nonlinear Cosmic Ray-driven Instability
• An X-ray and Radio Study of the Varying Expansion Velocities in Tycho's Supernova Remnant
• On the Jitter Radiation
• Accounting for Calibration Uncertainties in X-ray Analysis: Effective Areas in Spectral Fitting
• The Origin of the Iron-Rich Knot in Tycho's Supernova Remnant
• Direct Ejecta Velocity Measurements of Tycho's Supernova Remnant
• Expansion and Age of the X-ray Synchrotron-Dominated Supernova Remnant G330.2+1.0
• Large-field CO(1--0) observations toward the Galactic historical supernova remnants: a large cavity around Tycho's supernova remnant
• Spatially resolved spectroscopy of nonthermal X-rays in RX J1713.7-3946 with Chandra

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