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An Entropy Threshold for Strong H-alpha and Radio Emission in the Cores of Galaxy Clusters
Kenneth W. Cavagnolo, Megan Donahue, G. Mark Voit +1
Our Chandra X-ray Observatory archival study of intracluster entropy in a sample of 222 galaxy clusters shows that H-alpha and radio emission from the brightest cluster galaxy are…
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…
Star Formation, Radio Sources, Cooling X-ray Gas, and Galaxy Interactions in the Brightest Cluster Galaxy in 2A0335+096
Megan Donahue, Ming Sun, Christopher P. O'Dea +2
We present deep emission-line imaging taken with the SOAR Optical Imaging Camera of the brightest cluster galaxy (BCG) in the nearby (z=0.035) X-ray cluster 2A0335+096. We analyze…
ASCA observations of two SNRs and NEI analysis
Ming Sun, Zhenru Wang
Based on the data from the \asca observation of SNRs Kes79 and W49B, we present here the analysis of their X-ray spectra and morphologies. The Kes79 spectrum can be well fitted by…
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…