Results 101 to 110 of about 617 (181)

Tidal Suppression of Fuzzy Dark Matter Heating in Milky Way Satellite Galaxies

The Astrophysical Journal Letters
Many previous studies have imposed stringent constraints on the particle mass of fuzzy dark matter (FDM) by analyzing observations of Galactic satellite galaxies, which show no significant evidence of the heating effect predicted by FDM.
Yu-Ming Yang, Zhao-Chen Zhang, Xiao-Jun Bi, Peng-Fei Yin   +3 more
doaj   +1 more source

Leaving No Branches Behind: Predicting Baryonic Properties of Galaxies from Merger Trees

The Astrophysical Journal
Galaxies play a key role in our endeavor to understand how structure formation proceeds in the Universe. For any precision study of cosmology or galaxy formation, there is a strong demand for huge sets of realistic mock galaxy catalogs, spanning ...
Chen-Yu Chuang, Christian Kragh Jespersen, Yen-Ting Lin, Shirley Ho, Shy Genel   +4 more
doaj   +1 more source

Accelerating Massive Galaxy Formation with Primordial Black Hole Seed Nuclei

The Astronomical Journal
If massive primordial black holes (PBHs) exist and constitute a fraction of the dark matter, they can dramatically catalyze galaxy formation. By acting as pre-existing, high-density seeds, they can shorten the galaxy assembly time to as little as 100 Myr
Jeremy Mould
doaj   +1 more source

Observational Signatures of Dark Matter Vortices in Ultralight Bosonic Halos via Gravitational Lensing

The Astrophysical Journal Letters
Ultralight bosonic dark matter (ULDM) is an interesting and promising dark matter candidate. While the wavelike nature of ULDM has been widely studied in the literature, we explore another distinctive feature of ULDM as a Bose–Einstein condensate (BEC ...
Rongzi Zhou, Dylan M. H. Leung, Jason S. C. Poon, Ming-Chung Chu   +3 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  

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

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

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

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

A forward modeling approach to analyzing galaxy clustering with SimBIG. [PDF]

Proc Natl Acad Sci U S A, 2023
Hahn C, Eickenberg M, Ho S, Hou J, Lemos P, Massara E, Modi C, Moradinezhad Dizgah A, Blancard BR, Abidi MM.   +9 more
europepmc   +1 more source