搜索结果: 1-15 共查到“恒星与银河系 matter”相关记录20条 . 查询时间(0.125 秒)
Enhancement of nuclear pasta formation due to multi-nucleus simultaneous collision is presented based on time-dependent density functional calculations with periodic boundary condition. This calculati...
R-Process Nucleosynthesis in Dynamically Ejected Matter of Neutron Star Mergers
Nucleosynthesis Dynamically Ejected Matter Neutron Star Mergers
2011/9/28
Although the rapid neutron-capture process, or r-process, is fundamentally important for explaining the origin of approximately half of the stable nuclei with A > 60, the astrophysical site of this pr...
Dark Matter distribution in the Milky Way: microlensing and dynamical constraints
Dark Matter distribution Milky Way microlensing dynamical constraints
2011/10/20
We show that current microlensing and dynamical observations of the Galaxy allow to set interesting constraints on the Dark Matter local density and profile slope towards the galactic centre. Assuming...
A basic property of objects, like galaxies and halos that form in cosmological structure formation simulations, is their shape. Here, we critically investigate shape determination methods that are com...
Pairwise Velocities of Dark Matter Halos: a Test for the Lambda Cold Dark Matter Model using the Bullet Cluster
method : N-body simulations — galaxies : evolution — galaxies : for-mation — galaxies: clusters — cosmology : theory — cosmology : dark matter
2011/10/13
The existence of a bullet cluster (such as 1E0657-56) poses a challenge to the concordance Lambda cold dark matter model. Here we investigate the velocity distribution of dark matter halo pairs in lar...
Too small to succeed? Lighting up massive dark matter subhaloes of the Milky Way
methods: numerical - N-body simulations – galaxies: formation - haloes - Local Group
2011/10/19
Using Constrained Local UniversE Simulations (CLUES) of the formation of the Local Group in a cosmological context we investigate the recently highlighted problem that the majority of the most massive...
The outer haloes of the Milky Way and Andromeda galaxies contain as much important information on their assembly and formation history as the properties of the discs resident in their centres. In this...
Magnetic properties of quark matter are discussed in the light of the observation of pulsars. Our works about spontaneous spin polarization and spin density wave are reviewed and their implications on...
Probing bulk viscous matter-dominated models with Gamma-ray bursts
Probing viscous matter-dominated Gamma-ray bursts
2011/9/27
In this paper we extend the range of consistency of a constant bulk viscosity model to redshifts up to $z\sim 8.1$. In this model the dark sector of the cosmic substratum is a viscous fluid with press...
'Best evidence yet' for dark matter comes from Milky Way centre（图）
dark matter Milky Way centre
2010/12/1
Energetic radiation pulsing from the belly of the Milky Way is the clearest signal yet of dark matter. That is according to a pair of astrophysicists in the US who reach this conclusion after scrutini...
We revisit ghost dark matter, the possibility that ghost condensation may serve as an alternative to dark matter. In particular, we investigate the Friedmann-Robertson-Walker (FRW) background evolutio...
Alternatives to dark matter: Modified gravity as an alternative to dark matter
dark matter Modified gravity
2010/3/19
The premier alternative to the dark matter paradigm is modified gravity. Following an introduction to the relevant phenomenology of galaxies, I review the MOND paradigm, an effective summary of the ob...
Luke-warm dark matter: Bose-condensation of ultra-light particles
Luke-warm dark matter ultra-light particles
2010/3/18
We discuss the thermal evolution and Bose condensation of ultra-light scalar particles with Compton wavelength of galactic scales. We find an upper bound of 1.5 K for the dark matter temperature from ...
Flat central density profiles from scalar field dark matter halos
density profiles scalar field dark matter halos
2009/7/10
Flat central density profiles from scalar field dark matter halos。
Low mass dark matter halos in voids。