Results 121 to 130 of about 16,803 (214)

On the Origin of the Ancient, Large-scale Cold Front in the Perseus Cluster of Galaxies

The Astrophysical Journal
The intracluster medium of the Perseus Cluster exhibits spiral-shaped X-ray surface brightness discontinuities known as “cold fronts,” which simulations indicate are caused by the sloshing motion of the gas after the passage of a subcluster.
Elena Bellomi, John A. ZuHone, Rainer Weinberger, Stephen A. Walker, Irina Zhuravleva, Mateusz Ruszkowski, Maxim Markevitch   +6 more
doaj   +1 more source

SDSS-C4 3028: the Nearest Blue Galaxy Cluster Devoid of an Intracluster Medium

The Open Journal of Astrophysics
SDSS-C4 3028 is a galaxy cluster at $z=0.061$, notable for its unusually high fraction of star-forming galaxies with 19 star-forming and 11 quiescent spectroscopically-confirmed member galaxies. From Subaru/HSC imaging, we derived a weak lensing mass of $
Shweta Jain, Yuanyuan Su, Andra Stroe, Paul Nulsen, Hyejeon Cho, Kim HyeongHan, M. James Jee, Ralph P. Kraft, Scott Randall, Jimmy A. Irwin, Ryan L. Sanders, Christine Jones   +11 more
doaj   +1 more source

Toward Cosmological Simulations of the Magnetized Intracluster Medium with Resolved Coulomb Collision Scale

The Astrophysical Journal
We present the first results of one extremely high-resolution, nonradiative magnetohydrodynamical cosmological zoom-in simulation of a massive cluster with a virial mass of  M _vir = 2.0 × 10 ^15 solar masses. We adopt a mass resolution of 4 × 10 ^5 M _⊙
Ulrich P. Steinwandel, Klaus Dolag, Ludwig M. Böss, Tirso Marin-Gilabert   +3 more
doaj   +1 more source

XRISM Constrains Atmospheric Motion and Turbulent Dissipation in the Archetypal Radio-mode Feedback System Hydra-A

The Astrophysical Journal
We present XRISM Resolve observations centered on Hydra-A, a redshift z = 0.054 brightest cluster galaxy, which hosts one of the largest and most powerful FR-I radio sources in the nearby Universe.
Tom Rose, B. R. McNamara, Julian Meunier, A. C. Fabian, Helen Russell, Paul Nulsen, Neo Dizdar, Timothy M. Heckman, Michael McDonald, Maxim Markevitch, Frits Paerels, Aurora Simionescu, Norbert Werner, Alison L. Coil, Edmund Hodges-Kluck, Eric D. Miller, Michael Wise   +16 more
doaj   +1 more source

Gravity-selected galaxy clusters: A tight mass-richness relation and an unclear Compton Y-richness trend

Astronomy & Astrophysics
This paper, the third in a series, investigates the scaling relations between optical richness, weak-lensing mass, and Compton Y for a sample of galaxy clusters selected purely by their gravitational effect on the shapes of background galaxies.
Andreon S., Radovich M.
doaj   +1 more source

CHEX-MATE: New detections and properties of the radio diffuse emission in massive clusters with MeerKAT

Astronomy & Astrophysics
Modern radio telescopes are revolutionising our understanding of non-thermal phenomena in galaxy clusters, collecting large samples of extended sources with unprecedented sensitivity and angular resolution.
Balboni M., Gastaldello F., Bonafede A., Botteon A., Bartalucci I., Cassano R., De Grandi S., Ettori S., Gaspari M., Ghizzardi S., Gitti M., Johnston-Hollitt M., Lovisari L., Molendi S., Pointecouteau E., Pratt G. W., Riva G., Rossetti M., Sayers J., Sereno M., van Weeren R. J.   +20 more
doaj   +1 more source

Three-dimensional Thermodynamic Structures of the Intracluster Medium across Edges in the X-Ray Surface Brightness of Massive, Bright, Dynamically Active Galaxy Clusters

The Astrophysical Journal
We present a detailed study of three-dimensional (3D) thermodynamic structures of the intracluster medium (ICM) across edges in the X-ray surface brightness of four massive, bright, dynamically active galaxy clusters (A3667, A2319, A520, and A2146), with
Shutaro Ueda, Yuto Ichinohe
doaj   +1 more source

The Relation between the Cool-core Radius and the Host Galaxy Clusters: Thermodynamic Properties and Cluster Mass

The Astrophysical Journal
We present a detailed study of cool-core systems in a sample of four galaxy clusters (RXCJ1504.1-0248, A3112, A4059, and A478) using archival X-ray data from the Chandra X-ray Observatory.
FanLam Ng, Shutaro Ueda
doaj   +1 more source

A Yin-yang Galaxy Cluster Merger in A1914 Revealed by XRISM

The Astrophysical Journal Letters
Hierarchical mergers of galaxy clusters play a key role in converting gravitational energy into thermal and kinetic energy in the local Universe.
Annie Heinrich, Congyao Zhang, Irina Zhuravleva, Eugene Churazov, Hannah McCall, Reinout J. van Weeren, William R. Forman   +6 more
doaj   +1 more source

Chemical Composition of the Intracluster Medium

, 2003
Clusters of galaxies are massive enough to be considered representative samples of the Universe, and to retain all of the heavy elements synthesized in their constituent stars. Since most of these metals reside in hot plasma, X-ray spectroscopy of clusters provides a unique and fundamental tool for studying chemical evolution.
openaire   +2 more sources