Results 101 to 110 of about 2,234,166 (364)
A SYSTEMATIC ANALYSIS OF CAUSTIC METHODS FOR GALAXY CLUSTER MASSES [PDF]
, 2013 We quantify the expected observed statistical and systematic uncertainties of the escape velocity as a measure of the gravitational potential and total mass of galaxy clusters.
D. Gifford, C. Miller, N. Kern
semanticscholar +1 more source
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
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
The Astrophysical JournalThe Local Volume Complete Cluster Survey is an ongoing program to observe nearly a hundred low-redshift X-ray-luminous galaxy clusters (redshifts 0.03 < z < 0.12 and X-ray luminosities in the 0.1–2.4 keV band L _X500c > 10 ^44 erg s ^−1 ) with the Dark ...
Shenming Fu +33 more
doaj +1 more source
The sizes of galaxy halos in galaxy cluster Abell 1689
, 2006 The multiple images observed in galaxy cluster Abell 1689 provide strong constraints not only on the mass distribution of the cluster but also on the ensemble properties of the cluster galaxies. Using parametric strong lensing models for the cluster, and
A. Halkola +5 more
core +1 more source
Evolution of galaxies in clusters
The Astrophysical Journal, 1994 33 pages, normal ...
Joseph Silk, Stephane Charlot
openaire +4 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
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
Cluster Membership of Galaxies Using Multi-Layer Perceptron Neural Network
Universe, 2022 In this study, we report systematic investigations of the membership of galaxies inside a cluster using a machine learning (ML) neural network. By directly assigning the membership, rather than estimating the galaxy redshift as an intermediate step, we ...
Yasuhiro Hashimoto, Cheng-Han Liu
doaj +1 more source