The X-ray Iron Emission from Tycho's Supernova Remnant

Abstract

We present the results of broadband fits to the X-ray spectrum of Tycho's supernova remnant obtained by the Solid-State Imaging Spectrometers on the ASCA Observatory. We use single-temperature, single-ionization-age, nonequilibrium ionization models to characterize the ejecta and the blast-shocked interstellar medium. Based on the Fe K emission at 6.5 keV, previous spectral studies have suggested that the Fe ejecta in this Type Ia remnant are stratified interior to the other ejecta. The ASCA data provide important constraints from the Fe L emission near 1 keV as well as the Fe K emission. We find that the simplest models, with emission from the ejecta and blast wave each at a single temperature and ionization age, severely underestimate the Fe K flux. We show that there is little Fe emission associated with the Si and S ejecta shell. The blast-shocked interstellar medium has abundances roughly 0.3 times the solar value, while the ejecta, with the exception of Fe, have relative abundances that are typical of Type Ia supernovae. The addition of another component of Fe emission, which we associate with ejecta, at a temperature at least two times higher and an ionization age $\sim$ 100 times lower than the Si ejecta, does provide a good fit to the spectrum. This model is consistent with X-ray imaging results. Although fluorescent emission from dust in the remnant may contribute to the Fe K flux, we conclude that it is unlikely to dominate.

23 pages, LaTex; 4 postscript figures, 2 postscript tables. To appear in ApJ, vol 497

References in corpus (1)

• Far-UV Absorption Lines in the Remnant of SN 1006

Cited by in corpus (40)

• Nucleosynthesis in Chandrasekhar Mass Models for Type Ia Supernovae and Constraints on Progenitor Systems and Burning-Front Propagation
• Cosmic Ray Acceleration at the Forward Shock in Tycho's Supernova Remnant: Evidence from Chandra X-ray Observations
• Constraints on the Physics of Type Ia Supernovae from the X-Ray Spectrum of the Tycho Supernova Remnant
• Balmer-Dominated Spectra of Nonradiative Shocks in the Cygnus Loop, RCW 86 and Tycho Supernova Remnants
• Instabilities and Clumping in Type Ia Supernova Remnants
• Thermal X-ray emission from shocked ejecta in Type Ia Supernova Remnants. Prospects for explosion mechanism identification
• XMM-Newton observation of the Tycho Supernova Remnant
• Expansion Velocity of Ejecta in Tycho's Supernova Remnant Measured by Doppler Broadened X-ray Line Emission
• Are Ti44-Producing Supernovae Exceptional?
• The Expansion of the X-ray Remnant of Tycho's Supernova (SN1572)
• XMM-Newton observation of Kepler's supernova remnant
• New Evidence for Efficient Collisionless Heating of Electrons at the Reverse Shock of a Young Supernova Remnant
• X-Ray Spectroscopy of SN 1006 with Suzaku
• The Radial Structure of SNR N103B
• Thermal X-Ray Emission from Shocked Ejecta in Type Ia Supernova Remnants II: Parameters Affecting the Spectrum
• Raising the Dead: Clues to Type Ia Supernova Physics from the Remnant 0509-67.5
• XMM-Newton observations of Sagittarius A East
• The Interaction of Type Ia Supernovae with their Surroundings: The Exponential profile in 2D
• The Origin of the Iron-Rich Knot in Tycho's Supernova Remnant
• Elemental Abundances in the Possible Type Ia Supernova Remnant G344.7-0.1
• A Broadband X-Ray Study of the Supernova Remnant 3C 397
• The Morphologies and Kinematics of Supernova Remnants
• Rayleigh-Taylor Instabilities in Type Ia Supernova Remnants undergoing Cosmic-Ray Particle Acceleration - Low Adiabatic Index Solutions
• Spatial distribution of X-ray emitting ejecta in Tycho's SNR: indications of shocked Titanium
• Spectrum and Composition of Ultra-high Energy Cosmic Rays from Semi-relativistic Hypernovae
• A study of Tycho's SNR at TeV energies with the HEGRA CT-System
• A Cr-K emission line survey in young supernova remnants with Chandra
• An Ejecta Kinematics Study of Kepler's Supernova Remnant with High-Resolution $Chandra$ HETG Spectroscopy
• New Insights into SNR Evolution Revealed by the Discovery of Recombining Plasmas
• Thermal and Nonthermal Emission from the Forward Shock in Tycho's Supernova Remnant
• The 3-D X-ray Ejecta Structure of Tycho's Supernova Remnant
• Clump Development by the Nickel Bubble Effect in Supernovae
• Low-frequency radio absorption in Tycho's supernova remnant
• Inner-shell ionization, radiative losses and thermal conductivity in young SNRs
• X-ray Study of Spatial Structures in Tycho's Supernova Remnant Using Unsupervised Deep Learning
• Kinematics of Supernova Remnants: Status of X-Ray Observations
• Evidence for gamma-ray emission from the remnant of Kepler's supernova based on deep H.E.S.S. observations
• Fe-rich ejecta in the supernova remnant G352.7-0.1 with Suzaku
• ASCA observations of two SNRs and NEI analysis
• Reverse-Shock in Tycho's Supernova Remnant