Results 101 to 110 of about 2,290,802 (222)

Low Injection Rate of Cosmic-Ray Protons in the Turbulent Reacceleration Model of Radio Halos in Galaxy Clusters

The Astrophysical Journal
A giant radio halo (RH) is a diffuse synchrotron emission observed on the scale of megaparsecs, typically found in the central region of merging galaxy clusters.
Kosuke Nishiwaki, Katsuaki Asano
doaj   +1 more source

Studying the Patterns of the Universe

Open Astronomy, 2011
The SDSS galaxy catalog is one of the best databases for galaxy distribution studies. The SDSS DR8 data is used to construct the galaxy cluster catalog.
Sepp T., Tempel E., Gramann M., Nurmi P., Haupt M.   +4 more
doaj   +1 more source

Formation Scenarios for Globular Clusters and Their Host Galaxies [PDF]

arXiv, 2001
This review focuses on how galaxies and their globular cluster systems form. I first discuss the now fairly convincing evidence that some globular clusters form in galaxy starbursts/mergers. One way these observations are valuable is they place important constraints on the physics of the formation of globular clusters.
arxiv  

Cosmic ray feedback in galaxies and galaxy clusters: A pedagogical introduction and a topical review of the acceleration, transport, observables, and dynamical impact of cosmic rays. [PDF]

Astron Astrophys Rev, 2023
Ruszkowski M, Pfrommer C.
europepmc   +1 more source

On the Particle Acceleration Mechanisms in a Double Radio Relic Galaxy Cluster, Abell 1240

The Astrophysical Journal
We present a 368 ks deep Chandra observation of Abell 1240, a binary merging galaxy cluster at a redshift of 0.195 with two brightest cluster galaxies that may have passed each other 0.3 Gyr ago.
Arnab Sarkar, Felipe Andrade-Santos, Reinout J. van Weeren, Ralph P. Kraft, Duy N. Hoang, Timothy W. Shimwell, Paul Nulsen, William Foreman, Scott Randall, Yuanyuan Su, Priyanka Chakraborty, Christine Jones, Eric Miller, Mark Bautz, Catherine E. Grant   +14 more
doaj   +1 more source

Galaxy clusters enveloped by vast volumes of relativistic electrons. [PDF]

Nature, 2022
Cuciti V, de Gasperin F, Brüggen M, Vazza F, Brunetti G, Shimwell TW, Edler HW, van Weeren RJ, Botteon A, Cassano R, Di Gennaro G, Gastaldello F, Drabent A, Röttgering HJA, Tasse C.   +14 more
europepmc   +1 more source

Test of Cosmic Web-feeding Model for Star Formation in Galaxy Clusters in the COSMOS Field

The Astrophysical Journal
It is yet to be understood how large-scale environments influence star formation activity in galaxy clusters. One recently proposed mechanism is that galaxy clusters can remain star forming when fed by infalling groups and star-forming galaxies from ...
Eunhee Ko, Myungshin Im, Seong-Kook Lee, Clotilde Laigle   +3 more
doaj   +1 more source

Restrictions on Extended Gravity at Galaxy Clusters Scales

EPJ Web of Conferences, 2018
Following [1] we discuss the predictions of Starobinsky model of f(R)-gravity with vanishing cosmological constant at galaxy and galaxy clusters scales.
Alexeyev Stanislav, Latosh Boris, Echeistov Vsevolod   +2 more
doaj   +1 more source

Multiobject Spectroscopy of Galaxy Clusters at z ∼ 0.95 in the Ultra Deep Survey Field with Different Star Formation Properties and Large-scale Environments

The Astrophysical Journal Supplement Series
While galaxy clusters are dominated by quiescent galaxies in the local Universe, they show a wide range in quiescent galaxy fraction (QF) at higher redshifts.
Seong-Kook Lee, Myungshin Im, Bomi Park, Minhee Hyun, Insu Paek, Dohyeong Kim   +5 more
doaj   +1 more source

The Numbers of Early-Type Stars in the Galaxy and Their Relation to Galactic Clusters and Associations [PDF]

, 1957
Morton S. Roberts
openalex   +1 more source