A joint Chandra and XMM-Newton view of Abell 3158: a massive off-centre cool gas clump as a robust diagnostic of a merger stage

  title={A joint Chandra and XMM-Newton view of Abell 3158: a massive off-centre cool gas clump as a robust diagnostic of a merger stage},
  author={Yu Wang and Haiguang Xu and Liyi Gu and Junhua Gu and Zhenzhen Qin and Jingying Wang and Zhongli Zhang and Xiang-Ping Wu},
  journal={Monthly Notices of the Royal Astronomical Society},
In previous works, the nearby galaxy cluster Abell 3158 was reported to possess a relatively regular, relaxed morphology in the X-ray band. By analysing the Chandra and XMM-Newton archived data of Abell 3158, we have identified a bow-edge-shaped discontinuity in the X-ray surface brightness distribution about 120 h -1 71 kpc west of the X-ray peak. This feature is found to be associated with a massive, off-centre cool gas clump, and actually forms the west boundary of the cool clump. By… Expand

Figures and Tables from this paper

Revealing a Head-on Major Merger in the Nearby NGC 6338 Group with Chandra and VLA Observations
By analyzing the Chandra archival data of the nearby NGC 6338 galaxy group, we identify two X-ray bright clumps (N-clump and S-clump) within the central 100 kpc, and detect an arc-like X-rayExpand
The duty cycle of radio-mode feedback in complete samples of clusters
The Chandra X-ray Observatory has revealed X-ray bubbles in the intracluster medium (ICM) of many nearby cooling-flow clusters. The bubbles trace feedback that is thought to couple the central activeExpand
The Onset of Thermally Unstable Cooling from the Hot Atmospheres of Giant Galaxies in Clusters - Constraints on Feedback Models
We present accurate mass and thermodynamic profiles for a sample of 56 galaxy clusters observed with the Chandra X-ray Observatory. We investigate the effects of local gravitational acceleration inExpand
The MeSsI (merging systems identification) algorithm and catalogue
Merging galaxy systems provides observational evidence of the existence of dark matter and constraints on its properties. Therefore, statistical uniform samples of merging systems would be a powerfulExpand
Advection by Large-scale Spiral Flows in Galaxy Clusters
The intracluster medium of a galaxy cluster often shows an extended quasi-spiral structure, accentuated by tangential discontinuities known as cold fronts (CFs). These discontinuities are thought toExpand
Deprojecting galaxy-cluster cold fronts: evidence for bulk, magnetized spiral flows
Tangential discontinuities known as cold fronts (CFs) are abundant in groups and clusters of galaxies (GCs). The relaxed, spiral-type CFs were initially thought to be isobaric, but a significant,Expand


Chandra Observation of Abell 2065: An Unequal Mass Merger?
We present an analysis of a 41 ks Chandra ACIS-I observation of the merging cluster Abell 2065. Previous ROSAT and ASCA observations provided evidence for an ongoing merger and suggested that thereExpand
Chandra Temperature Map of A754 and Constraints on Thermal Conduction
We use Chandra data to derive a detailed gas temperature map of the nearby, hot, merging galaxy cluster A754. Combined with the X-ray and optical images, the map reveals a more complex mergerExpand
AWM 4 - an isothermal cluster observed with XMM-Newton
We present an analysis of an XMM-Newton observation of the poor cluster AWM 4. The cluster is relaxed and its X-ray halo is regular with no apparent substructure. Azimuthally averaged radial spectralExpand
A Moving Cold Front in the Intergalactic Medium of A3667
We present results from a Chandra observation of the central region of the galaxy cluster A3667 with emphasis on the prominent sharp X-ray brightness edge spanning 0.5 Mpc near the cluster core. OurExpand
By analyzing the gas temperature maps created from the Chandra archive data, we reveal the prevailing existence of temperature substructures on ~100 h –1 70 kpc scales in the central regions of nineExpand
XMM¿Newton observations of Abell 2255: a test case of a merger after `core crossing¿
It has been known that Abell 2255 is not a relaxed cluster, but it is undergoing a merger. Here, we report on the analysis of the XMM–Newton observations of this cluster. The X-ray data give us theExpand
Probing the Dark Matter and Gas Fraction in Relaxed Galaxy Groups with X-Ray Observations from Chandra and XMM-Newton
We present radial mass profiles within ~0.3rvir for 16 relaxed galaxy groups—poor clusters (kT range 1-3 keV) selected for optimal mass constraints from the Chandra and XMM-Newton data archives.Expand
Chandra Observation of A2256: A Cluster at the Early Stage of Merging
We present Chandra observations of the rich cluster of galaxies A2256. In addition to the known cool subcluster, a new structure (we call it the "shoulder" in this paper, based on its morphology) wasExpand
We present an analysis of a 40 ks Chandra observation of the galaxy group AWM 5. It has a small (~8 kpc) dense cool core with a temperature of ~1.2 keV and the temperature profile decreases at largerExpand
XMM-Newton EPIC observation of the galaxy cluster A 3667
The Abell cluster of galaxies A 3667 was observed with XMM-Newton in 6 partially overlapping pointings. We present here the resulting X-ray surface brightness, temperature, entropy and pressure mapsExpand