Results 31 to 40 of about 1,810 (225)
On a Generalized Mass-Velocity Relation for Disk Galaxies and Galaxy Clusters
, 2021 We consolidate the BFJ and BTF (MVD) relations into a generalized Scaling Mass Velocity Relation applicable to both pressure-supported galaxy clusters and rotation-supported galaxies. Unlike MOND inspired relations containing a characteristic acceleration scale and its normalization factor, our proposal is dependent on observed dynamic surface mass ...
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Large-scale clustering of galaxies in general relativity
Physical Review D, 2012 Several recent studies have shown how to properly calculate the observed clustering of galaxies in a relativistic context, and uncovered corrections to the Newtonian calculation that become significant on scales near the horizon. Here, we retrace these calculations and show that, on scales approaching the horizon, the observed galaxy power spectrum ...
Jeong, Donghui +2 more
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Next generation cosmology: constraints from theEuclidgalaxy cluster survey [PDF]
Monthly Notices of the Royal Astronomical Society, 2016 We study the characteristics of the galaxy cluster samples expected from the European Space Agency's Euclid satellite and forecast constraints on cosmological parameters describing a variety of cosmological models. The method used in this paper, based on the Fisher Matrix approach, is the same one used to provide the constraints presented in the Euclid
Sartoris, B. +12 more
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Pointing to the minimum scatter: the generalized scaling relations for galaxy clusters [PDF]
Monthly Notices of the Royal Astronomical Society, 2011 6 pages, 3 figures.
Ettori S. +4 more
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, 2023 A long-standing problem when deriving the physical properties of stellar populations is the degeneracy between age, reddening, and metallicity. When a single metallicity is used for all the star clusters in a galaxy, this degeneracy can result in ...
Pan, Hsi-an
core +1 more source
The Next Generation Virgo Cluster Survey. XXXIV. Ultracompact Dwarf Galaxies in the Virgo Cluster
The Astrophysical Journal Supplement Series, 2020 Abstract We present a study of ultracompact dwarf (UCD) galaxies in the Virgo cluster based mainly on imaging from the Next Generation Virgo Cluster Survey (NGVS). Using ∼100 deg2 of u*giz imaging, we have identified more than 600 candidate UCDs, from the core of Virgo out to its virial radius.
Liu, Chengze +30 more
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New perspective on galaxy clustering as a cosmological probe: General relativistic effects [PDF]
Physical Review D, 2009 10 pages, 2 figures, accepted for publication in Physical Review ...
Yoo, Jaiyul +2 more
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Generation and Implications of Post-Merger Turbulence in Clusters of Galaxies [PDF]
Symposium - International Astronomical Union, 1998 Observations in X-ray and optical suggest that mergers of sub-clusters with galaxy clusters are quite common (for Coma see e.g., White et al. 1993; Colless & Dunn 1996; Ishizaka & Mineshige 1996). A merger leads to violent relaxation of the dissipationless dark matter resulting in a time-dependent gravitational potential. This in turn generates
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Advanced Materials, EarlyView.A fully flexible ion‐gel‐gated graphene‐channel transistor driven by a triboelectric nanogenerator enables self‐powered tactile sensing and synaptic learning. Mimicking spike‐rate‐dependent plasticity, the device exhibits frequency‐selective potentiation and depression, supporting rate‐coded neuromorphic computation even under flex.
Hanseong Cho +3 more
wiley +1 more source
Early Starbursts and Magnetic Field Generation in Galaxy Clusters
The Astrophysical Journal, 2000 24 pages, 4 figures, to appear in ...
Voelk, Heinrich J., Atoyan, A. M.
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