Results 1 to 10 of about 173,637 (267)

The effect of dwarf galaxies disruption in semi-analytic models [PDF]

, 2007
We present results for a galaxy formation model that includes a simple treatment for the disruption of dwarf galaxies by gravitational forces and galaxy encounters within galaxy clusters.
Arnaboldi, Arnaboldi, Baldry, Baldry, Benson, Bernstein, Bertone, Bertone, Bower, Bruno M. Henriques, Bullock, Calcáneo-Roldán, Conroy, Croton, De Lucia, Drinkwater, Durrell, Faltenbacher, Feldmeier, Feldmeier, Feldmeier, Feldmeier, Gal-Yam, Gnedin, Gonzalez, Gonzalez, Gregg, Hilker, Hilker, Jones, Krick, Madgwick, Merritt, Mihos, Monaco, Moore, Murante, Murante, Napolitano, Neill, Norberg, Peter A. Thomas, Purcell, Richstone, Rudick, Serena Bertone, Sommer-Larsen, Springel, Springel, Taylor, Trentham, Willman, Zibetti, Zibetti, Zwicky   +54 more
core   +3 more sources

Searching for Dark Structures: A Comparison of Weak-lensing Convergence Maps and Lensing-weighted Galaxy Density Maps

The Astrophysical Journal Supplement Series
We present the result of a comparison between the dark matter distribution inferred from weak gravitational lensing and the observed galaxy distribution to identify dark structures with a high dark-matter-to-galaxy density ratio.
Soojin Kim, Ho Seong Hwang, Niall Jeffrey   +2 more
doaj   +1 more source

Shadows of Sgr A$$^{*}$$ ∗ black hole surrounded by superfluid dark matter halo

European Physical Journal C: Particles and Fields, 2020
In this paper we construct a black hole solution surrounded by superfluid dark matter and baryonic matter, and study their effects on the shadow images of the Sgr A$$^{*}$$ ∗ black hole.
Kimet Jusufi, Mubasher Jamil, Tao Zhu
doaj   +1 more source

Formation of Wormholes by Dark Matter in the Galaxy Dragonfly 44

, 2018
Recently, ultra diffuse galaxy (UDG) of Dragonfly 44 in the Coma Cluster was observed and observations of the rotational speed suggest that its mass is almost same as the mass of the Milky Way. On the other hand, interestingly, the galaxy emits only 1 \%
Halilsoy, Mustafa, Islam, Sayeedul, Rahaman, Farook, Övgün, Ali   +3 more
core   +1 more source

Anomalous anisotropic cross-correlations between WMAP CMB maps and SDSS galaxy distribution and implications on the dark flow scenario

, 2012
We search for the dark flow induced diffuse kinetic Sunyaev Zel'dovich (kSZ) effect through CMB-galaxy cross correlation. Such angular correlation is anisotropic, with a unique $cos(theta_DF)$ angular dependence and hence can be distinguished from other ...
Blanton, Blanton, Blanton, Cabré, Choi, de Vaucouleurs, Fosalba, Gold, Górski, Jing, Juszkiewicz, Kashlinsky, Kashlinsky, Kashlinsky, Lavaux, Li, Ma, Mody, Nusser, Osborne, Pengjie Zhang, Pike, Planck Collaboration ., Xuelei Chen, Zehavi, Zhigang Li   +25 more
core   +1 more source

Tidal Formation of Dark Matter Deficit Diffuse Galaxy NGC 1052-DF2 by SIDM

The Astrophysical Journal
Observations have revealed a significant dark matter deficit in the ultradiffuse galaxy NGC 1052-DF2 (DF2). It is widely accepted that the formation of this unique galaxy can be attributed to the tidal stripping of its host galaxy, NGC 1052.
Zhao-Chen Zhang, Xiao-Jun Bi, Peng-Fei Yin   +2 more
doaj   +1 more source

The introduction of baryon string in the model of spiral galaxies structure [PDF]

Компьютерные исследования и моделирование, 2012
It proposes a new alternative approach to explain the flat spectrum of the velocity for stars orbital motion on the periphery of spiral galaxies. In particular, that velocity significant excess of speed calculated according to the virial theorem.
A. V. Koganov, Vladimir G. Krechet
doaj   +1 more source

Signature of the interaction between dark energy and dark matter in observations

, 2010
We investigate the effect of an interaction between dark energy and dark matter upon the dynamics of galaxy clusters. This effect is computed through the Layser-Irvine equation, which describes how an astrophysical system reaches virial equilibrium and ...
Elcio Abdalla, José C. C. de Souza, L. Raul Abramo, N. Bahcall, P. J. E. Peebles, V. Sahni   +5 more
core   +1 more source

Self-interacting dark matter on small and large scales

SciPost Physics Proceedings, 2023
In the self-interacting dark matter paradigm (hereafter SIDM), dark matter (DM) is assumed to have non-gravitational interactions with itself. SIDM has been constrained by observations of galaxy clusters. More recently, measurements of large DM densities
Camila A. Correa
doaj   +1 more source

Constraining the Dark Matter decay lifetime with very deep observations of the Perseus cluster with the MAGIC telescopes [PDF]

, 2015
We present preliminary results on Dark Matter searches from observations of the Perseus galaxy cluster with the MAGIC Telescopes. MAGIC is a system of two Imaging Atmospheric Cherenkov Telescopes located in the Canary island of La Palma, Spain.
Colin, P., Doro, Michele, Maggio, C., Palacio, J., Rico, J., Vazquez Acosta, M., Zandanel on behalf of the MAGIC, Collaboration   +6 more
core