Zobrazeno 1 - 10
of 110
pro vyhledávání: '"Galaxy dark 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:
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
Publikováno v:
The Astrophysical Journal, Vol 976, Iss 1, p 54 (2024)
Thin stellar streams originating from globular clusters (GCs) are among the most sensitive tracers of low-mass dark matter subhalos. Joint analysis of the entire population of stellar streams will place the most robust constraints on the dark matter
Externí odkaz:
https://doaj.org/article/c8117d731adf4f2ba9e4d6a9448f61c2
Autor:
Mathias Lipka, Jens Thomas, Roberto Saglia, Ralf Bender, Maximilian Fabricius, Christian Partmann
Publikováno v:
The Astrophysical Journal, Vol 976, Iss 1, p 17 (2024)
We analyze the dark matter (DM) halos of a sample of dwarf ellipticals (dEs) and discuss cosmological and evolutionary implications. Using orbit modeling, we recover their density slopes and, for the first time, halo flattening. We find that the “c
Externí odkaz:
https://doaj.org/article/60267bf348c04057b77f6f21d1092b26
Publikováno v:
The Astrophysical Journal, Vol 976, Iss 1, p 37 (2024)
We investigate the connection between galaxies, dark matter halos, and their large-scale environments at z = 0 with Illustris TNG300 hydrodynamic simulation data. We predict stellar masses from subhalo properties to test two types of machine learning
Externí odkaz:
https://doaj.org/article/b1b6934f95294a2090954e1e779051e8