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Astronomers detect dark matter halo around ancient dwarf galaxy（图）
Astronomers detect dark matter halo ancient dwarf galaxy
2021/3/5
The Milky Way is surrounded by dozens of dwarf galaxies thought to be relics of the first galaxies in the universe. Among the most primitive of these galactic fossils is Tucana II -- an ultrafaint dwa...
Dark Matter Halos: Assembly, Clustering and Sub-halo Accretion
Dark matter Galaxy formation Halos
2014/12/9
I carried out systematic studies on the assembly history of dark matter halos, using numerical simulations and semi-analytical methods. First, I look into dark halo mass assembly history. I confirmed ...
Galaxy-galaxy lensing constraints on the relation between baryons and dark matter in galaxies in the Red Sequence Cluster Survey 2
gravitational lensing: weak - galaxies: formation - galaxies: halos
2011/10/12
We present the results of a study of weak gravitational lensing by galaxies using imaging data that were obtained as part of the second Red Sequence Cluster Survey (RCS2). In order to compare to the b...
The Non-Linear Matter Power Spectrum in Warm Dark Matter Cosmologies
Cosmology: theory – large-scale structure of the Universe – dark matter,methods: numerical – gravitational lensing: weak
2011/10/12
We investigate the non-linear evolution of the matter power spectrum by using a large set of high-resolution N-body/hydrodynamic simulations. The linear matter power in the initial conditions is consi...
Galaxy Formation Simulations with Scalar Field Dark Matter
Galaxy Formation Simulations Scalar Field Dark Matter
2009/6/16
Galaxy Formation Simulations with Scalar Field Dark Matter。
Shallow cores in the dark matter halos：self-interaction in action?
dark matter halos self-interaction
2009/6/8
Shallow cores in the dark matter halos：self-interaction in action?
NGC 404, a galaxy without dark matter。
DARK MATTER HALOES：AN ADDITIONAL CRITERION FOR THE CHOICE OF FITTING DENSITY PROFILES
cosmology dark matter
2009/3/5
Simulated dark matter haloes are tted by self-similar, universal
density pro les, where the scaled parameters depend only on a scaled (truncation)
radius, = R=r0, which, in turn, is supposed to b...
NASA Scientists Find Primordial Organic Matter in Tagish Lake Meteorite(图）
Organic Matter Solar System meteorite
2006/12/8
November 30, 2006，NASA researchers at Johnson Space Center, Houston have found organic materials that formed in the most distant reaches of the early Solar System preserved in a unique meteorite. The ...