94 citations · 481 across the 24 of their papers we have counts for
17 papers · 1 filter
A Puzzling Merger in A3266: the Hydrodynamic Picture from XMM-Newton
A. Finoguenov, M. J. Henriksen, F. Miniati +2
Using the mosaic of nine XMM-Newton observations, we study the hydrodynamic state of the merging cluster of galaxies Abell 3266. The high quality of the spectroscopic data and larg…
Cluster mergers, core oscillations, and cold fronts
Eric R. Tittley, Mark Henriksen
We use numerical simulations with hydrodynamics to demonstrate that a class of cold fronts in galaxy clusters can be attributed to oscillations of the dark matter distribution. The…
XMM-Newton study of A3562 and its immediate Shapley environs
A. Finoguenov, M. J. Henriksen, U. G. Briel +2
Using the mosaic of six XMM-Newton observations, we study the hydrodynamic state of the A3562, a cluster in the center of the Shapley Supercluster. The X-ray image reveals a sharp…
Diffuse Non-thermal X-ray Emission: Evidence for Cosmic-ray Acceleration at the Shock Front in IC1262
Daniel S. Hudson, Mark J. Henriksen
We report the first localization of diffuse, non-thermal, X-ray emission from a nearby galaxy cluster. Using Chandra data, we have isolated a diffuse non-thermal X-ray component wi…
A Soft X-ray Component in the Abell 754 Cluster
Mark J. Henriksen, Daniel S. Hudson, Eric Tittley
We have analyzed the Chandra, BeppoSax, and ROSAT observations of Abell 754 and report evidence of a soft, diffuse X-ray component. The emission is peaked in the cluster center and…
A BeppoSAX Observation of the IC1262 Galaxy Cluster
D. S. Hudson, M. J. Henriksen, S. Colafrancesco
We present an analysis of BeppoSAX observations of the IC1262 galaxy cluster and report the first temperature and abundance measurements, along with preliminary indications of diff…
Chandra Observations of the A3266 Galaxy Cluster Merger
Mark J. Henriksen, Eric R. Tittley
Analysis of a 30,000 s X-ray observation of the Abell 3266 galaxy cluster with the ACIS on board the Chandra Observatory has produced several new insights into the cluster merger.…
Reconstructing the Merger History of the A3266 Galaxy Cluster
Mark Henriksen, R. Hank Donnelly, David S. Davis
A temperature map of the A3266 galaxy cluster has been derived from the ASCA GIS observations. It shows an asymmetric pattern of heating indicative of an ongoing merger between a g…
RXTE and ASCA Constraints on Non-thermal Emission from the A2256 Galaxy Cluster
M. Henriksen
An 8.3 hour observation of the Abell 2256 galaxy cluster using the Rossi X-ray Timing Explorer proportional counter array produced a high quality spectrum in the 2 - 30 keV range.…
An X-ray Survey of Galaxies in Pairs
M. Henriksen, S. Cousineau
Results are reported from the first survey of X-ray emission from galaxies in pairs. The sample consists of fifty-two pairs of galaxies from the Catalog of Paired Galaxies Karachen…
A2111: A z=0.23 Butcher-Oemler Cluster with a Non-isothermal Atmosphere and Normal Metallicity
Mark Henriksen, Q. Daniel Wang, Melville Ulmer
We report results from an X-ray study of the Abell 2111 galaxy cluster using the Advanced Satellite for Astrophysics and Cosmology ASCA and the ROSAT Position Sensitive Proportiona…
RXTE Hard X-ray Observation of A754: Constraining the Hottest Temperature Component and the Intracluster Magnetic Field
A. Valinia, M. J. Henriksen, M. Loewenstein +3
Abell 754, a cluster undergoing merging, was observed in hard X-rays with the Rossi X-ray Timing Explorer (RXTE) in order to constrain its hottest temperature component and search…
X-ray Constraints on Cluster Magnetic Fields
Mark Henriksen
Lower limits to the intracluster magnetic field are derived from modeling broad band X-ray spectra of 6 galaxy clusters with radio halos (A401, A754, A1367, Coma (A1656), A2256, an…
ASCA Atlas of the Cluster Temperatures
M. L. Markevitch, C. L. Sarazin, M. J. Henriksen
We use ASCA data to obtain two-dimensional maps of the gas temperature in three clusters: A754, A3558 and Triangulum Australis (the maps of A2256, A2319, A2163 and A665, also prese…
Abell 754: A Non-Head On Collision of Subclusters
Mark Henriksen, Maxim Markevitch
We have analyzed spatially resolved spectra of A754 obtained with ASCA. The combination of spectral and imaging capabilities of ASCA has set unprecedented constraints on the hydrod…
Non-isothermal X-ray Emitting Gas in Clusters of Galaxies
Mark J. Henriksen, Raymond E. White
We have analyzed X-ray spectra from six galaxy clusters which contain cooling flows: A85, A478, A1795, A2142, A2147, & A2199. The X-ray spectra were taken with the HEAO1-A2 Medium…
The Baryonic Fraction in Groups of Galaxies from X-Ray Measurements
Mark J. Henriksen, Gary A. Mamon
The recent {\sl ROSAT \/} X-ray detections of hot intergalactic gas in three groups of galaxies are reviewed and the resulting baryonic fraction in these groups is reevaluated. We…