Zobrazeno 1 - 10
of 1 801
pro vyhledávání: '"MATTER HALOS"'
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
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
Publikováno v:
The Astrophysical Journal, Vol 976, Iss 2, p 197 (2024)
The abundance of satellite galaxies is set by the hierarchical assembly of their host halo. We leverage this to investigate the low-mass end ( M _H < 10 ^11 M _⊙ ) of the stellar-to-halo mass relation (SHMR), which is key to constraining theories o
Externí odkaz:
https://doaj.org/article/433aee74cdb9451f94c306aea482af91
Autor:
Yunchong Wang, Ethan O. Nadler, Yao-Yuan Mao, Risa H. Wechsler, Tom Abel, Peter Behroozi, Marla Geha, Yasmeen Asali, Mithi A. C. de los Reyes, Erin Kado-Fong, Nitya Kallivayalil, Erik J. Tollerud, Benjamin Weiner, John F. Wu
Publikováno v:
The Astrophysical Journal, Vol 976, Iss 1, p 119 (2024)
Environment plays a critical role in shaping the assembly of low-mass galaxies. Here, we use the U niverse M achine (UM) galaxy–halo connection framework and Data Release 3 of the Satellites Around Galactic Analogs (SAGA) Survey to place dwarf gala
Externí odkaz:
https://doaj.org/article/836bcb4830ba4084ac7eb687974ed2bd
Autor:
K. J. Kwon, ChangHoon Hahn
Publikováno v:
The Astrophysical Journal, Vol 976, Iss 1, p 76 (2024)
Galaxy clustering contains information on cosmology, galaxy evolution, and the relationship between galaxies and their dark matter hosts. On small scales, the detailed kinematics of galaxies within their host halos determines the galaxy clustering. I
Externí odkaz:
https://doaj.org/article/803c339f64a74e8883a812d4904ebcbf
Publikováno v:
The Astrophysical Journal, Vol 976, Iss 1, p 47 (2024)
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. While the former effect is well understood within the Press–Schechter and excursion
Externí odkaz:
https://doaj.org/article/b11a54c7b9564d3ca0bd69a3bb22e40c