Zobrazeno 1 - 10
of 172
pro vyhledávání: '"galaxy: dark matter"'
Autor:
Qinxun Li, Martin Kilbinger, Wentao Luo, Kai Wang, Huiyuan Wang, Anna Wittje, Hendrik Hildebrandt, Ludovic Van Waerbeke, Michael J. Hudson, Samuel Farrens, Tobías I. Liaudat, Huiling Liu, Ziwen Zhang, Qingqing Wang, Elisa Russier, Axel Guinot, Lucie Baumont, Fabian Hervas Peters, Thomas de Boer, Jiaqi Wang, Alan McConnachie, Jean-Charles Cuillandre, Sébastien Fabbro
Publikováno v:
The Astrophysical Journal Letters, Vol 969, Iss 2, p L25 (2024)
This Letter presents, for the first time, direct constraints on the black hole–halo mass relation using weak gravitational-lensing measurements. We construct type I and type II active galactic nucleus (AGN) samples from the Sloan Digital Sky Survey
Externí odkaz:
https://doaj.org/article/03b90714ef5e4e34a70a24fb0160c605
Publikováno v:
The Astrophysical Journal Letters, Vol 968, Iss 1, p L13 (2024)
The satellite galaxy Crater II of the Milky Way is extremely cold and exceptionally diffuse. These unusual properties are challenging to understand in the standard model of cold dark matter. We use controlled N -body simulations to investigate the fo
Externí odkaz:
https://doaj.org/article/4fa135fc1b8c48d5a68794cb1050cdc1
Publikováno v:
The Astrophysical Journal Letters, Vol 965, Iss 2, p L19 (2024)
van Dokkum et al. reported the discovery of JWST-ER1, a strong lensing object at redshift z ≈ 2, using data from the James Webb Space Telescope. The lens mass within the Einstein ring is 5.9 times higher than the expected stellar mass from a Chabri
Externí odkaz:
https://doaj.org/article/99fcbb2a55564798a2692f35e7975da8
Publikováno v:
The Astrophysical Journal Letters, Vol 961, Iss 1, p L10 (2024)
Nonlinear structure formation for fermionic dark matter particles leads to dark matter density profiles with a degenerate compact core surrounded by a diluted halo. For a given fermion mass, the core has a critical mass that collapses into a supermas
Externí odkaz:
https://doaj.org/article/fca9f22df68246a581bcd3731c82858b
Akademický článek
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Akademický článek
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Publikováno v:
The Astrophysical Journal, Vol 977, Iss 2, p 184 (2024)
Cosmological simulations of galaxy formation are an invaluable tool for understanding galaxy formation and its impact on cosmological parameter inference from large-scale structures. However, their high computational cost is a significant obstacle fo
Externí odkaz:
https://doaj.org/article/3e4f6a8a33964dd69c91e3a4b18f9588
Autor:
José A. Benavides, Laura V. Sales, Mario. G. Abadi, Mark Vogelsberger, Federico Marinacci, Lars Hernquist
Publikováno v:
The Astrophysical Journal, Vol 977, Iss 2, p 169 (2024)
We study the stellar properties of a sample of simulated ultradiffuse galaxies (UDGs) with stellar mass M _⋆ = 10 ^7.5 –10 ^9 M _⊙ , selected from the TNG50 simulation, where UDGs form mainly in high-spin dwarf-mass halos. We divide our sample
Externí odkaz:
https://doaj.org/article/07f906708ab2489f8ae111a672a39892
Autor:
Jiaxin He, Wenting Wang, Zhaozhou Li, Jiaxin Han, Vicente Rodriguez-Gomez, Donghai Zhao, Xianguang Meng, Yipeng Jing, Shi Shao, Rui Shi, Zhenlin Tan
Publikováno v:
The Astrophysical Journal, Vol 976, Iss 2, p 187 (2024)
We investigate the mass ( M _200 ) and concentration ( c _200 ) dependencies of the velocity anisotropy ( β ) profiles for different components in the dark matter halo—including halo stars, dark matter, and subhalos—using systems from the Illust
Externí odkaz:
https://doaj.org/article/ba91b729ba6941609d95ec0cdac5b5f9
Publikováno v:
The Astrophysical Journal, Vol 976, Iss 2, p 189 (2024)
Dark matter (DM) bars that shadow stellar bars have been previously shown to form in idealized simulations of isolated disk galaxies, but have yet to be studied in a fully cosmological context. In this work, we analyze a population of disk galaxies w
Externí odkaz:
https://doaj.org/article/20603d14b2044c10a220f2638dc713f3