Results 131 to 140 of about 33,866 (165)

The Formation of Dark Matter Halos and High-Redshift Galaxies

, 2011
In the concordance LCDM cosmological model, galaxies form in the centers of dark matter halos and merge with one another following the mergers of their host halos. Thus, we set out to quantify the growth mechanisms of dark matter halos. For this purpose, we analyze several large N-body simulations of the growth of cosmic structure.
openaire   +2 more sources

Solving Milky Way–sized Systems with Haskap Pie: A Halo Finding Algorithm with Efficient Sampling, K-means Clustering, Tree-assembly, Particle Tracking, Python Modules, Intercode Applicability, and Energy Solving

The Astrophysical Journal
We describe a new Python-based stand-alone halo finding algorithm, Haskap Pie , that combines several methods of halo finding and tracking into a single calculation. Our halo-finder flexibly solves halos for simulations produced by eight simulation codes
Kirk S. S. Barrow, Thịnh Hữu Nguyễn, Edward Skrabacz   +2 more
doaj   +1 more source

Chameleon gravity as an alternative to dark matter

European Physical Journal C: Particles and Fields
By studying the chameleon gravity on galaxy scales, we investigate the effects of the chameleon dark matter. To perform this task, we consider the dynamics of the chameleon scalar field in the region of galactic halos in static spherically symmetric ...
Raziyeh Zaregonbadi, Nasim Saba, Mehrdad Farhoudi   +2 more
doaj   +1 more source

Hydro-Gravitational Dynamics of Planets and Dark Energy

Journal of Applied Fluid Mechanics, 2009
Self gravitational fluid mechanical methods termed hydro-gravitational-dynamics (HGD) predict plasma fragmentation 0.03 Myr after the turbulent big bang to form protosuperclustervoids, turbulent protosuperclusters, and protogalaxies at the 0.3 Myr ...
Carl H. Gibson, R.E, Schild
doaj  

The Dependence of Dark Matter Halo Properties on the Morphology of Their Central Galaxies from Weak Lensing

The Astrophysical Journal
Xu & Jing reported a monotonic relationship between the host halo mass M _h and the morphology of massive central galaxies, characterized by the Sérsic index n , at fixed stellar mass, suggesting that morphology could serve as a good secondary proxy for ...
Zhenjie Liu, Kun Xu, Jun Zhang, Wenting Wang, Cong Liu   +4 more
doaj   +1 more source

The AIDA-TNG project: Abundance, radial distribution, and clustering properties of halos in alternative dark matter models

Astronomy & Astrophysics
Warm and self-interactive dark matter cosmologies have been proposed as nonbaryonic solutions to the tensions between the Λ cold dark matter model and observations at the kiloparsec scale.
Romanello M., Despali G., Marulli F., Giocoli C., Moscardini L., Vogelsberger M.   +5 more
doaj   +1 more source

Halo Asymmetry in the Modeling of Galaxy Clustering

The Astrophysical Journal
Conventional studies of galaxy clustering within the framework of halo models typically assume that the density profile of all dark matter halos can be approximated by the Navarro–Frenk–White (NFW) spherically symmetric profile.
Anna Durkalec, Agnieszka Pollo, Ummi Abbas   +2 more
doaj   +1 more source

Constructing a Galaxy Cluster Catalog in IllustrisTNG300 Using the Mulguisin Algorithm

The Astrophysical Journal
We present a new simulated galaxy cluster catalog based on the IllustrisTNG simulation. We use the Mulguisin (MGS) algorithm to identify galaxy overdensities.
Lael Shin, Jubee Sohn, Young Ju, Inkyu Park, Cristiano G. Sabiu   +4 more
doaj   +1 more source

Origin and Full Characterization of the Secondary (Assembly) Halo Bias

The Astrophysical Journal
The clustering of dark matter halos depends not only on their mass, the so-called primary bias, but also on their internal properties, the so-called secondary bias.
Eduard Salvador-Solé, Alberto Manrique, Eduard Agulló   +2 more
doaj   +1 more source

SIDM Concerto: Compilation and Data Release of Self-interacting Dark Matter Zoom-in Simulations

The Astrophysical Journal
We present SIDM Concerto: 14 cosmological zoom-in simulations in cold dark matter (CDM) and self-interacting dark matter (SIDM) models based on the Symphony and Milky Way-est suites.
Ethan O. Nadler, Demao Kong, Daneng Yang, Hai-Bo Yu   +3 more
doaj   +1 more source