Zobrazeno 1 - 10
of 591
pro vyhledávání: '"Cosmological Evolution"'
Autor:
Gen Ye, Alessandra Silvestri
Publikováno v:
The Astrophysical Journal Letters, Vol 963, Iss 1, p L15 (2024)
Recently the international pulsar timing array collaboration has announced the first strong evidence for an isotropic gravitational-wave background (GWB). We propose that rapid small oscillations (wiggles) in the Hubble parameter would trigger a reso
Externí odkaz:
https://doaj.org/article/5f9ba780e5254520aa4c8829c6f4e6b0
Akademický článek
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Akademický článek
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Autor:
Koen B. Tanghe, Sylvain Billiard
Publikováno v:
Философия и космология, Vol 29, Pp 4-16 (2022)
The evolution (sensu lato) of the cosmos can be divided in three phases: cosmological evolution (sensu stricto), biological evolution and cultural evolution. Analogies between biological and cultural evolution date from the nineteenth century althoug
Externí odkaz:
https://doaj.org/article/d937a78e4e8841a69df786d70b4884b8
Autor:
Claire Poppett, Luke Tyas, J. Aguilar, Christopher Bebek, D. Bramall, T. Claybaugh, J. Edelstein, P. Fagrelius, H. Heetderks, P. Jelinsky, S. Jelinsky, Robin Lafever, A. Lambert, M. Lampton, Michael E. Levi, P. Martini, C. Rockosi, J. Schmoll, Ray M. Sharples, Martin Sirk, Edward Wishnow, Jiaxi Yu, S. Ahlen, A. Bault, S. BenZvi, D. Brooks, S. Cole, A. de la Macorra, Arjun Dey, P. Doel, K. Fanning, A. Font-Ribera, J. E. Forero-Romero, E. Gaztañaga, S. Gontcho A Gontcho, A. X. Gonzalez-Morales, C. Hahn, K. Honscheid, J. Jimenez, S. Juneau, D. Kirkby, A. Kremin, M. Landriau, L. Le Guillou, M. Manera, A. Meisner, R. Miquel, J. Moustakas, E. Mueller, A. Muñoz-Gutiérrez, A. D. Myers, J. Nie, G. Niz, N. Palanque-Delabrouille, W. J. Percival, F. Prada, D. Rabinowitz, M. Rezaie, G. Rossi, E. Sanchez, Edward F. Schlafly, D. Schlegel, M. Schubnell, H. Seo, D. Sprayberry, G. Tarlé, M. Vargas-Magaña, B. A. Weaver, R. Zhou
Publikováno v:
The Astronomical Journal, Vol 168, Iss 6, p 245 (2024)
The Dark Energy Spectroscopic Instrument (DESI) is a revolutionary instrument designed for precise measurements of cosmic distances and the investigation of dark energy. DESI utilizes 5000 optical fibers to simultaneously measure the spectra of dista
Externí odkaz:
https://doaj.org/article/26a9a3655a6b427c8fe85547195d4b7f
Publikováno v:
The Astrophysical Journal, Vol 976, Iss 1, p 6 (2024)
Supermassive black holes (SMBHs) can grow through both accretion and mergers. It is still unclear how SMBHs evolve under these two channels from high redshifts to the SMBH population we observe in the local Universe. Observations can directly constra
Externí odkaz:
https://doaj.org/article/0345bc6ce1c04e7c95edb33e6739bbad
Publikováno v:
The Astrophysical Journal, Vol 975, Iss 1, p 64 (2024)
The idea of composite dark energy (DE) is quite natural since on general grounds we expect that the vacuum energy density (associated with the cosmological term Λ) may appear in combination with other effective forms of DE, denoted X . Here we deal
Externí odkaz:
https://doaj.org/article/54486321444047f8ba27c43e9a22ab3c
Autor:
Karolina Garcia, Desika Narayanan, Gergö Popping, R. Anirudh, Sagan Sutherland, Melanie Kaasinen
Publikováno v:
The Astrophysical Journal, Vol 974, Iss 2, p 197 (2024)
We present slick (the Scalable Line Intensity Computation Kit), a software package that calculates realistic CO, [C i ], and [C ii ] luminosities for clouds and galaxies formed in hydrodynamic simulations. Built on the radiative transfer code despoti
Externí odkaz:
https://doaj.org/article/a2595cf3524c4a60842a94bf538528eb
Publikováno v:
The Astrophysical Journal, Vol 972, Iss 1, p 28 (2024)
Cosmological parameters such as Ω _M and σ _8 can be measured indirectly using various methods, including galaxy cluster abundance and cosmic shear. These measurements constrain the composite parameter S _8 , leading to degeneracy between Ω _M and
Externí odkaz:
https://doaj.org/article/c07e8fdb19754d418c9fc3f58546eb16
Publikováno v:
The Astrophysical Journal, Vol 971, Iss 2, p 136 (2024)
We present two uniformly observed spectroscopic samples of Ly α emitters (LAEs; 127 at z = 5.7 and 82 at z = 6.6), which we use to investigate the evolution of the LAE population at these redshifts. The observations cover a large field (44 deg ^2 )
Externí odkaz:
https://doaj.org/article/0f72d04b3d4442a89a46db661ea2c2cc