The X-ray surface brightness of Kepler's supernova remnant

1983 ◽  
Vol 264 ◽  
pp. 196 ◽  
Author(s):  
R. L. White ◽  
K. S. Long
Keyword(s):  
Surface Brightness ◽  
Supernova Remnant ◽  
X Ray

scholarly journals Temporal and spatial variation of synchrotron X-ray stripes in Tycho’s supernova remnant

2020 ◽  
Vol 72 (5) ◽  
Author(s):  
Masamune Matsuda ◽  
Takaaki Tanaka ◽  
Hiroyuki Uchida ◽  
Yuki Amano ◽  
Takeshi Go Tsuru
Keyword(s):  
Surface Brightness ◽  
Supernova Remnant ◽  
Time Variability ◽  
X Rays ◽  
Temporal And Spatial Variation ◽  
Proton Acceleration ◽  
X Ray ◽  
Temporal And Spatial ◽  
Imaging And Spectroscopy ◽  
The Magnetic Field

Abstract The synchrotron X-ray “stripes” discovered in Tycho’s supernova remnant (SNR) have been attracting attention as they may be evidence for proton acceleration up to PeV. We analyzed Chandra data taken in 2003, 2007, 2009, and 2015 for imaging and spectroscopy of the stripes in the southwestern region of the SNR. Comparing images obtained at different epochs, we find that time variability of synchrotron X-rays is not limited to two structures previously reported but is more common in the region. Spectral analysis of nine bright stripes reveals not only their time variabilities but also a strong anti-correlation between the surface brightness and photon indices. The spectra of the nine stripes have photon indices of Γ = 2.1–2.6 and are significantly harder than those of the outer rim of the SNR in the same region with Γ = 2.7–2.9. Based on these findings, we indicate that the magnetic field is substantially amplified, and suggest that particle acceleration through a stochastic process may be at work in the stripes.

scholarly journals The Peculiar X-ray Morphology of the SNR G292.0+1.8 : Evidence for an Asymmetric Supernova Explosion

1983 ◽  
Vol 101 ◽  
pp. 153-158
Author(s):  
D. H. Clark ◽  
I. R. Tuohy
Keyword(s):  
Surface Brightness ◽  
Supernova Remnant ◽  
Supernova Explosion ◽  
Morphological Properties ◽  
Type Ii ◽  
X Ray ◽  
Young Supernova Remnant ◽  
Rich Material ◽  
Einstein Observatory ◽  
Shell Characteristic

A high resolution X-ray image from the Einstein Observatory of the young supernova remnant G292.0+1.8 (MSH11–54), previously noted as peculiar in terms of its spectral and morphological properties at optical and radio wavelengths, also shows an unusual X-ray morphology. Instead of a limb-brightened X-ray shell characteristic of most SNRs, the remnant consists of a central bar-like feature superposed on an ellipsoidal disc of approximately uniform surface brightness. We attribute the bar emission to a ring of oxygen-rich material ejected in the equatorial plane of a massive rotating progenitor, and the uniform disc component to emission from material with roughly cosmic composition heated by the accompanying blast wave. This interpretation provides observational support for the rotating precursor model of a Type II supernova discussed by Bodenheimer and Woosley.

scholarly journals High Resolution Radio Observations of the SNR G160.9+2.6 (HB9)

1988 ◽  
Vol 101 ◽  
pp. 301-304
Author(s):  
D.A. Leahy ◽  
R.S. Roger
Keyword(s):  
High Resolution ◽  
Surface Brightness ◽  
Supernova Remnant ◽  
Optical Emission ◽  
Continuum Emission ◽  
Filamentary Structure ◽  
X Ray ◽  
Significant Spatial Variation ◽  
Optical Structure ◽  
The Continuum

AbstractG160.9+2.6 (HB9) is a supernova remnant of large angular diameter and low radio surface brightness. We report new observations of the continuum emission from HB9 at 408 MHz and 1420 MHz with angular resolutions of 3.5’ and 1.0#x2019;, respectively, which reveal significant filamentary structure not previously detected. The 1420 MHz field covers only the central and eastern parts of HB9. The 408-1420 MHz spectral index (S∝vα) of regions common to both maps is α=-0.68, with no significant spatial variation. The radio filamentary structure closely follows the optical structure. X-ray emission from HB9 is more centrally concentrated than the radio or optical emission. The radio, optical, and particularly, the X-ray surface brightness are all diminished in the northern and northwestern portions of the remnant, in directions approximately coincident with an extensive molecular cloud detected in CO.

scholarly journals ASCA Observation of the Cygnus Loop Supernova Remnant

1998 ◽  
Vol 188 ◽  
pp. 254-255
Author(s):  
E. Miyata ◽  
H. Tsunemi
Keyword(s):  
Surface Brightness ◽  
Supernova Remnant ◽  
High Surface ◽  
Apparent Size ◽  
High Surface Brightness ◽  
X Ray ◽  
Cygnus Loop ◽  
Spatially Resolved ◽  
Absorption Features

The Cygnus Loop is the prototype shell-like supernova remnant (SNR) and one of the brighest SNRs in X-ray wavelength. We have observed the entire Cygnus Loop with the X-ray satellite, ASCA. Its large apparent size, high surface brightness, and low absorption features have made the Cygnus Loop to be an ideal target for the study of the spatially-resolved spectroscopic structure in detail. Part of this work was summarized in Miyata (1996). Here, we present the first X-ray image of the Cygnus Loop obtained with ASCA.

scholarly journals Discovery of recombining plasma inside the extended gamma-ray supernova remnant HB9

2019 ◽  
Vol 489 (3) ◽  
pp. 4300-4310 ◽  
Author(s):  
A Sezer ◽  
T Ergin ◽  
R Yamazaki ◽  
H Sano ◽  
Y Fukui
Keyword(s):  
Supernova Remnant ◽  
Gamma Ray ◽  
Radio Continuum ◽  
Continuum Emission ◽  
Large Area ◽  
Imaging Spectrometer ◽  
X Ray ◽  
East Region ◽  
X Ray Imaging ◽  
Collisional Ionization

ABSTRACT We present the results from the Suzaku X-ray Imaging Spectrometer observation of the mixed-morphology supernova remnant (SNR) HB9 (G160.9+2.6). We discovered recombining plasma (RP) in the western Suzaku observation region and the spectra here are well described by a model having collisional ionization equilibrium (CIE) and RP components. On the other hand, the X-ray spectra from the eastern Suzaku observation region are best reproduced by the CIE and non-equilibrium ionization model. We discuss possible scenarios to explain the origin of the RP emission based on the observational properties and concluded that the rarefaction scenario is a possible explanation for the existence of RP. In addition, the gamma-ray emission morphology and spectrum within the energy range of 0.2–300 GeV are investigated using 10 yr of data from the Fermi Large Area Telescope (LAT). The gamma-ray morphology of HB9 is best described by the spatial template of radio continuum emission. The spectrum is well fit to a log-parabola function and its detection significance was found to be 25σ. Moreover, a new gamma-ray point source located just outside the south-east region of the SNR’s shell was detected with a significance of 6σ. We also investigated the archival H i and CO data and detected an expanding shell structure in the velocity range of $-10.5$ and $+1.8$ km s−1 that is coinciding with a region of gamma-ray enhancement at the southern rim of the HB9 shell.

scholarly journals An X-ray characterization of the central region of the supernova remnant G332.5-5.6

2015 ◽  
Vol 583 ◽  
pp. A84 ◽  
Author(s):  
A. E. Suárez ◽  
J. A. Combi ◽  
J. F. Albacete-Colombo ◽  
S. Paron ◽  
F. García ◽  
...  
Keyword(s):  
Central Region ◽  
Supernova Remnant ◽  
X Ray

scholarly journals INFRARED AND X-RAY SPECTROSCOPY OF THE Kes 75 SUPERNOVA REMNANT SHELL: CHARACTERIZING THE DUST AND GAS PROPERTIES

2011 ◽  
Vol 745 (1) ◽  
pp. 46 ◽  
Author(s):  
Tea Temim ◽  
Patrick Slane ◽  
Richard G. Arendt ◽  
Eli Dwek
Keyword(s):  
Supernova Remnant ◽  
X Ray ◽  
Gas Properties

scholarly journals AN X-RAY AND RADIO STUDY OF THE VARYING EXPANSION VELOCITIES IN TYCHO’S SUPERNOVA REMNANT

2016 ◽  
Vol 823 (2) ◽  
pp. L32 ◽  
Author(s):  
Brian J. Williams ◽  
Laura Chomiuk ◽  
John W. Hewitt ◽  
John M. Blondin ◽  
Kazimierz J. Borkowski ◽  
...  
Keyword(s):  
Supernova Remnant ◽  
X Ray
Sign in / Sign up

Export Citation Format

Share Document