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Discovery of molecular shells associated with supernova remnants. (II) Kesteven 75
Yang Su, Yang Chen, Ji Yang +4
The young composite supernova remnant (SNR) Kesteven 75, with a pulsar wind nebula at its center, has an unusual morphology with a bright southern half-shell structure in multiwave…
Discovery of Molecular Shells Associated with Supernova Remnants. I. Kesteven 69
Xin Zhou, Yang Chen, Yang Su +1
Supernova remnant (SNR) Kes 69 is morphologically characterized by brightened radio, infrared, and X-ray emission on the southeastern rim, with the 1720 MHz OH masers detected in t…
The Thermal Composite Supernova Remnant Kes 27 as Viewed by CHANDRA: Shock Reflection from a Cavity Wall
Yang Chen, Frederick D. Seward, Ming Sun +1
We present a spatially resolved spectroscopic study of the thermal composite supernova remnant Kes 27 with Chandra. The X-ray spectrum of Kes 27 is characterized by K lines from Mg…
Chandra View of DA 530: A Sub-Energetic Supernova Remnant with a Pulsar Wind Nebula?
Bing Jiang, Yang Chen, Q. Daniel Wang
Based on a Chandra ACIS observation, we report the detection of an extended X-ray feature close to the center of the remnant DA 530 with 5.3 sigma above the background within a cir…
A Preliminary Chandra X-ray Spectroscopy of the Supernova Remnant N132D
Xiao Xiao, Yang Chen
We present the preliminary results of a Chandra X-ray study of N132D, a young shell-like supernova remnant (SNR) in the Large Magellanic Cloud. The equivalent width maps of emissio…
The Heart-shaped Supernova Remnant 3C391 viewed in Multi-bands
Yang Su, Yang Chen
Using Chandra X-ray, Spitzer mid-IR, and 1.5 GHz radio data, we examine the spatial structure of SNR 3C391. The X-ray surface brightness is generally anti-correlative with the IR a…
Narrow Band Chandra X-ray Analysis of Supernova Remnant 3C391
Yang Su, Yang Chen
We present the narrow-band and the equivalent width (EW) images of the thermal composite supernova remnant (SNR) 3C391 for the X-ray emission lines of elements Mg, Si, & S using th…
Highly Clumpy Structure of the Thermal Composite Supernova Remnant 3C391 Unveiled by Chandra
Yang Chen, Yang Su, Patrick O. Slane +1
The nature of the internal thermal X-ray emission seen in ``thermal composite" supernova remnants is still uncertain. Chandra observation of the 3C391 shows a southeast-northwest e…
ASCA Observations of the Thermal Composite Supernova Remnant 3C 391
Yang Chen, Patrick Slane
We present the results from ASCA observations of the centrally enhanced supernova remnant 3C 391 (G31.9+0.0). We use the ASCA SIS data to carry out an investigation of the spatial…
Chandra Observations of the Crab-like Supernova Remnant G21.5-0.9
Patrick Slane, Yang Chen, Norbert S. Schulz +3
Chandra observations of the Crab-like supernova remnant G21.5-0.9 reveal a compact central core and spectral variations indicative of synchrotron burn-off of higher energy electron…
An analysis of the X-ray emission from the supernova remnant 3C397
Yang Chen, Ming Sun, Zhen-Ru Wang +1
The ASCA SIS and the ROSAT PSPC spectral data of the SNR 3C397 are analysed with a two-component non-equilibrium ionization model. Besides, the ASCA SIS0 and SIS1 spectra are also…
X-ray Observation and Analysis of The Composite Supernova Remnant G327.1-1.1
Ming Sun, Zhen-ru Wang, Yang Chen
Based on the data from the observation of the SNR G327.1-1.1 by ASCA and ROSAT, we find that G327.1-1.1 is a composite remnant with both a nonthermal emission component and a diffu…
The Cone-Like H-alpha Nebula in NGC 4945: A Galactic Superwind Bow Shock ?
Yang Chen, Jie-Hao Huang
We find that a non-axisymmetric bow shock model, with an appropriate choice of parameters, could fit the line splitting velocity field of the cone-like H nebula in NGC 4945 bett…