Results 21 to 30 of about 789 (228)
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
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Characterization of Bars Induced by Interactions
Galaxies, 2016 Whether the formation of bars is triggered by interactions or by internal processes has been discussed for many decades. In this work, we study differences between both mechanisms by means of numerical simulations.
Inma Martinez-Valpuesta +2 more
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Evolution of Galaxies Through Their Interactions [PDF]
Symposium - International Astronomical Union, 1996 We investigated how the encounters between galaxies change their mass M and velocity dispersion σ. We carried out a series of direct N-body simulation of encounters of two spherical galaxies. In Figure 1, the relative change of energy ΔE/E are plotted against that of mass ΔM/M for various initial conditions.
Y. Funato, J. Marino
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Cosmic-Ray Propagation and Interactions in the Galaxy [PDF]
Annual Review of Nuclear and Particle Science, 2007 We survey the theory and experimental tests for the propagation of cosmic rays in the Galaxy up to energies of 1015eV. A guide to the previous reviews and essential literature is given, followed by an exposition of basic principles. The basic ideas of cosmic-ray propagation are described, and the physical origin of its processes is explained.
Strong, A., Moskalenko, I., Ptuskin, V.
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Bar-spheroid interaction in galaxies
The Astrophysical Journal, 1992 The secular evolution of barred galaxies is explored using N-body simulation and linear analysis. In particular, we examine the interaction between bars and spheroidal components of galaxies. According to our calculations, this interaction drives secular transfer of angular momentum from bars to spheroids, primarily through resonant coupling.
Hernquist, Lars, Weinberg, Martin D.
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The Astrophysical Journal Letters, 2023 Through adaptive optics (AO) imaging with the SOUL+LUCI instrument at the Large Binocular Telescope we were able to resolve, for the first time, individual stars in the gas-rich galaxy DDO68 C. This system was already suggested to be interacting with the
Francesca Annibali +9 more
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Tidal Disruption of Milky Way Satellites with Shallow Dark Matter Density Profiles
Galaxies, 2016 Dwarf galaxies of the Local Group provide unique possibilities to test current theories of structure formation. Their number and properties have put the broadly accepted cold dark matter model into question, posing a few problems. These problems now seem
Ewa L. Łokas
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Scale Interactions and Galaxy Evolution [PDF]
Astrophysics and Space Science, 2003 To understand galaxies and their evolution, it is necessary to describe how the different scales interact: how the microscopic physics, such as star formation, or the large scale physics, such as galaxy interactions may modify the galaxy global shapes.
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The Astrophysical Journal Letters, 2023 Extreme emission line galaxies (EELGs), where nebular emissions contribute 30%–40% of the flux in certain photometric bands, are ubiquitous in the early Universe ( z > 6).
Anshu Gupta +9 more
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Chemodynamical evolution of interacting galaxies
Astrophysics and Space Science, 2002 4 pages, 3 figures, to be published in "The Evolution of Galaxies. II. Basic Building Blocks", ed. M.
Combes, F., Melchior, A. L.
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