Zobrazeno 1 - 10
of 1 423
pro vyhledávání: '"Large-scale Structure of the Universe"'
Autor:
Jerzy Kijowski
Publikováno v:
Astronomy, Vol 3, Iss 1, Pp 29-42 (2024)
The notion of a local inertial reference frame is thoroughly analyzed. Dynamics of a field of such frames is derived from the variational principle. It is shown that the resulting theory splits naturally into three sectors, one of which is purely gra
Externí odkaz:
https://doaj.org/article/612586b87c8f427bb56aa659a2656c01
Autor:
Lior Shamir
Publikováno v:
Symmetry, Vol 16, Iss 10, p 1389 (2024)
The asymmetry in the large-scale distribution of the directions in which spiral galaxies rotate has been observed by multiple telescopes, all showing a consistent asymmetry in the distribution of galaxy spin directions as observed from Earth. Here, g
Externí odkaz:
https://doaj.org/article/f9f510adb5464773a9b26f68e9ff9ef9
Publikováno v:
The Astrophysical Journal Letters, Vol 977, Iss 2, p L44 (2024)
Bias models relating the dark matter field to the spatial distribution of halos are widely used in current cosmological analyses. Many models predict halos purely from the local Eulerian matter density, yet bias models in perturbation theory require
Externí odkaz:
https://doaj.org/article/274bbc8c1ee04b5086a0dffab79c7838
Autor:
Zhijian Zhang, Weikang Lin
Publikováno v:
The Astrophysical Journal Letters, Vol 973, Iss 2, p L42 (2024)
The suppression of the small-scale matter power spectrum is a distinct feature of warm dark matter (WDM), which permits a constraint on the WDM mass from galaxy surveys. In the thermal relic WDM scenario, quantum statistical effects are not manifest.
Externí odkaz:
https://doaj.org/article/eefa361b28c94af7a1edd41ee2771bb0
Publikováno v:
The Astrophysical Journal Letters, Vol 971, Iss 1, p L22 (2024)
We present the first measurement of the Ly α forest baryon acoustic oscillations (BAO) shift parameter from cosmological simulations. In particular, we generate a suite of 1000 accurate effective field-level bias-based Ly α forest simulations of vo
Externí odkaz:
https://doaj.org/article/87ceade93b25457c81b80be5a958a993
Autor:
Mark J. Henriksen, Prajwal Panda
Publikováno v:
The Astrophysical Journal Letters, Vol 961, Iss 2, p L36 (2024)
We use 3D k -means clustering to characterize galaxy substructure in the A2146 cluster of galaxies ( z = 0.2343). This method objectively characterizes the cluster’s substructure using projected position and velocity data for 67 galaxies within a 2
Externí odkaz:
https://doaj.org/article/fbcb5e0849e2482e8da1c03fa24f1b51
Publikováno v:
Universe, Vol 10, Iss 5, p 193 (2024)
The accelerated expansion of the Universe is impressively well described by a cosmological constant. However, the observed value of the cosmological constant is much smaller than expected based on quantum field theories. Recent efforts to achieve con
Externí odkaz:
https://doaj.org/article/3baf148d8bd545cc81d9e1ea5d38ff48
Akademický článek
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Autor:
Sina Taamoli, Negin Nezhad, Bahram Mobasher, Faezeh Manesh, Nima Chartab, John R. Weaver, Peter L. Capak, Caitlin M. Casey, Ghassem Gozaliasl, Kasper E. Heintz, Olivier Ilbert, Jeyhan S. Kartaltepe, Henry J. McCracken, David B. Sanders, Nicholas Scoville, Sune Toft, Darach Watson
Publikováno v:
The Astrophysical Journal, Vol 977, Iss 2, p 263 (2024)
The role of internal and environmental factors in the star formation activity of galaxies is still a matter of debate, in particular at higher redshifts. Leveraging the most recent release of the COSMOS catalog, COSMOS2020, as well as density measure
Externí odkaz:
https://doaj.org/article/edbaf4432134446189820097d8c2ca32
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