Results 1 to 10 of about 16,691 (214)

A Multiphase Model for the Intracluster Medium [PDF]

Monthly Notices of the Royal Astronomical Society, 1999
Constraints on the clustered mass density \Omega_m of the universe derived from the mean intracluster gas fraction of X-ray clusters may be biased by a single-phase assumption for the thermodynamic structure of the intracluster medium (ICM). We propose a
A. E. Evrard, Birkinshaw M., Cavaliere A., Cen R., Cole S., D. Nagai, David L. P., Eke V. R., Fabian A. C., Frenk C. S., Gunn K. F., Hamuy M., Inagaki Y., Irwin J. A., Irwin J. A., Jones M., M. E. Sulkanen, Mohr J. J., Navarro J. F., Neumann D. M., Nulsen P. E. J., Peres C. B., Raymond J. C., Riess A. G., Thomas P., Thomas P. A., White D. A., White S. D. M., Zaroubi S.   +28 more
core   +6 more sources

Inferences from Surface Brightness Fluctuations of Zwicky 3146 via the Sunyaev–Zel’dovich Effect and X-Ray Observations

The Astrophysical Journal, 2023
The galaxy cluster Zwicky 3146 is a sloshing cool-core cluster at z = 0.291 that in Sunyaev–Zel’dovich (SZ) imaging does not appear to exhibit significant pressure substructure in the intracluster medium.
Charles E. Romero, Massimo Gaspari, Gerrit Schellenberger, Tanay Bhandarkar, Mark Devlin, Simon R. Dicker, William Forman, Rishi Khatri, Ralph Kraft, Luca Di Mascolo, Brian S. Mason, Emily Moravec, Tony Mroczkowski, Paul Nulsen, John Orlowski-Scherer, Karen Perez Sarmiento, Craig Sarazin, Jonathan Sievers, Yuanyuan Su   +18 more
doaj   +1 more source

CHANDRA X-Ray Observations of A119: Cold Fronts and a Shock in an Evolved Off-axis Merger

The Astrophysical Journal, 2023
We present Chandra X-ray observations of the dynamically complex galaxy cluster A119 ( z = 0.044). A119 is host to two narrow-angle-tail (NAT) radio sources (0053-015 and 0053-016), whose tails are oriented parallel to each other, despite orthogonally ...
Courtney B. Watson, Elizabeth L. Blanton, Scott W. Randall, Craig L. Sarazin, Arnab Sarkar, John A. ZuHone, E. M. Douglass   +6 more
doaj   +1 more source

Mirror Acceleration of Cosmic Rays in a High-β Medium

The Astrophysical Journal, 2023
In a weakly compressible high- β medium, pitch-angle scattering and the associated scattering acceleration of cosmic rays (CRs) by anisotropic Alfvén and slow modes of magnetohydrodynamic (MHD) turbulence is inefficient.
Alex Lazarian, Siyao Xu
doaj   +1 more source

A Heating Mechanism via Magnetic Pumping in the Intracluster Medium

The Astrophysical Journal, 2023
Turbulence driven by active galactic nuclei activity, cluster mergers, and galaxy motion constitutes an attractive energy source for heating the intracluster medium (ICM).
Francisco Ley, Ellen G. Zweibel, Mario Riquelme, Lorenzo Sironi, Drake Miller, Aaron Tran   +5 more
doaj   +1 more source

The nature of the motions of multiphase filaments in the centers of galaxy clusters

Frontiers in Astronomy and Space Sciences, 2023
The intracluster medium (ICM) in the centers of galaxy clusters is heavily influenced by the “feedback” from supermassive black holes (SMBHs). Feedback can drive turbulence in the ICM and turbulent dissipation can potentially be an important source of ...
Shalini Ganguly, Yuan Li, Valeria Olivares, Yuanyuan Su, Francoise Combes, Sampadaa Prakash, Stephen Hamer, Pierre Guillard, Pierre Guillard, Trung Ha   +9 more
doaj   +1 more source

Electron Reacceleration via Ion Cyclotron Waves in the Intracluster Medium

The Astrophysical Journal, 2023
In galaxy clusters, the intracluster medium (ICM) is expected to host a diffuse, long-lived, and invisible population of “fossil” cosmic-ray electrons (CRe) with 1–100 MeV energies.
Aaron Tran, Lorenzo Sironi, Francisco Ley, Ellen G. Zweibel, Mario A. Riquelme   +4 more
doaj   +1 more source

Calcium-rich Gap Transients: Solving the Calcium Conundrum in the Intracluster Medium [PDF]

, 2014
X-ray measurements suggest the abundance of Calcium in the intracluster medium is higher than can be explained using favored models for core-collapse and Type Ia supernovae alone.
Kasliwal, Mansi M., Kollmeier, Juna A., Mulchaey, John S.   +2 more
core   +2 more sources

Modelling the Energy Spectra of Radio Relics

Galaxies, 2021
Radio relics are diffuse synchrotron sources that illuminate shock waves in the intracluster medium. In recent years, radio telescopes have provided detailed observations about relics.
Denis Wittor, Matthias Hoeft, Marcus Brüggen   +2 more
doaj   +1 more source

Formation of multiphase plasma in galactic haloes and an analogy to solar plasma

Frontiers in Astronomy and Space Sciences, 2023
Thermal instability (TI) potentially explains the origin of cold gas in the intracluster medium (ICM), which is heated sufficiently by AGN feedback. The Hα filaments seen in cluster cores provide strong motivation for TI.
Prakriti Pal Choudhury
doaj   +1 more source