Results 71 to 80 of about 150,051 (304)
Evolution of galaxies in clusters
The Astrophysical Journal, 1994 33 pages, normal ...
Joseph Silk, Stephane Charlot
openaire +4 more sources
New Arabic Records From Cairo on Supernovae 1181 and 1006
Astronomische Nachrichten, EarlyView.ABSTRACT The remnant of the historical supernova SN 1181 is under discussion: While the previously suggested G130.7+3.1 (3C58) appears too old (3000–5000 year), the unusual star IRAS00500+6713 with a surrounding nebula (Pa‐30) has an expansion age not inconsistent with a SN Iax explosion in ad 1181 under the assumption that neither acceleration nor ...
J. G. Fischer +3 more
wiley +1 more source
Impact of filaments on galaxy cluster properties in The Three Hundred simulation [PDF]
EPJ Web of ConferencesGalaxy clusters and their filamentary outskirts reveal useful laboratories to test cosmological models and investigate Universe composition and evolution. Their environment, in particular the filaments of the Cosmic Web to which they are connected, plays
Santoni S. +4 more
doaj +1 more source
The tau of galaxy clusters [PDF]
Journal of Cosmology and Astroparticle Physics, 2016 9 pages, 5 figures, Accepted to JCAP, typos ...
openaire +3 more sources
Galaxy harassment and the evolution of clusters of galaxies [PDF]
Nature, 1996 Disturbed spiral galaxies with high rates of star formation pervaded clusters of galaxies just a few billion years ago, but nearby clusters exclude spirals in favor of ellipticals. ``Galaxy harassment" (frequent high speed galaxy encounters) drives the morphological transformation of galaxies in clusters, provides fuel for quasars in subluminous hosts ...
Alan Dressler +4 more
openaire +2 more sources
Astronomische Nachrichten, EarlyView.ABSTRACT We present James Webb Space Telescope observations of M 4—the closest globular cluster—that probe the lower Main Sequence down to the hydrogen‐burning limit. The unveiled stellar sequence reaches much fainter luminosities than previously possible, revealing a few extremely red objects that are consistent with brown dwarfs as cool as Teff∼1000K$
L. R. Bedin +10 more
wiley +1 more source
The Astrophysical Journal, 2023 Active galactic nuclei (AGNs) are widely believed to be one of the promising acceleration sites of ultrahigh-energy cosmic rays (CRs). Essentially, AGNs are powered by the gravitational energy of matter falling into supermassive black holes. However, the
Xin-Yue Shi +3 more
doaj +1 more source
Wide field imaging of distant clusters
, 2004 Wide field imaging is key to understanding the build-up of distant clusters and their galaxy population. By focusing on the so far unexplored outskirts of clusters, where infalling galaxies first hit the cluster potential and the hot intracluster medium,
A. Diaferio, Tommaso Treu
core +2 more sources
The AGN fraction - velocity dispersion relation in clusters of galaxies [PDF]
, 2006 Some previous investigations have found that the fraction (f_AGN) of active galactic nuclei (AGNs) is lower in clusters than in the field. This can result from the suppression of galaxy-galaxy mergers in high-velocity dispersion (sigma_v) clusters, if ...
A. Biviano +42 more
core +2 more sources
Lensing by galaxy haloes in clusters of galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 1997 17 pages, LaTeX file, MNRAS in ...
Jean-Paul Kneib, Priyamvada Natarajan
openaire +3 more sources