Results 51 to 60 of about 431,236 (340)

The Aemulus Project. V. Cosmological Constraint from Small-scale Clustering of BOSS Galaxies

The Astrophysical Journal, 2023
We analyze clustering measurements of BOSS galaxies using a simulation-based emulator of two-point statistics. We focus on the monopole and quadrupole of the redshift-space correlation function, and the projected correlation function, at scales of 0.1 ...
Zhongxu Zhai, Jeremy L. Tinker, Arka Banerjee, Joseph DeRose, Hong Guo, Yao-Yuan Mao, Sean McLaughlin, Kate Storey-Fisher, Risa H. Wechsler   +8 more
doaj   +1 more source

Fuzzy Dark Matter as a Solution to Reconcile the Stellar Mass Density of High-z Massive Galaxies and Reionization History

The Astrophysical Journal, 2023
The JWST early release data show unexpected high stellar mass densities of massive galaxies at 7 < z < 11. A high star formation efficiency is probably needed to explain this.
Yan Gong, Bin Yue, Ye Cao, Xuelei Chen
doaj   +1 more source

Large scale structure and the generalised Chaplygin gas as dark energy [PDF]

, 2003
The growth of large scale structure is studied in a universe containing both cold dark matter (CDM) and generalized Chaplygin gas (GCg). GCg is assumed to contribute only to the background evolution of the universe while the CDM component collapses and ...
A. Dev, A. G. Riess, A. Kamenshchik, A. Sen, D. Carturan, D. N. Spergel, E. Gaztañaga, Enrique Gaztañaga, F. Bernardeau, G. Dvali, G. W. Gibbons, J. Alcaniz, J. C. Fabris, J. C. Fabris, K. Benabed, K. Freese, L. Amendola, L. M. G. Beca, M. Bento, M. Bento, M. Bento, M. Makler, Marc Manera, N. Bilic, P. Fosalba, P. J. E. Peebles, P. J. E. Peebles, P. P. Avelino, R. Bean, R. Crittenden, R. K. Sachs, R. R. Caldwell, R. Reis, S. Perlmutter, T. Multamäki, Tuomas Multamäki   +35 more
core   +1 more source

Automated detection of filaments in the large scale structure of the universe

, 2010
We present a new method to identify large scale filaments and apply it to a cosmological simulation. Using positions of haloes above a given mass as node tracers, we look for filaments between them using the positions and masses of all the remaining dark-
Aragón-Calvo, Aragón-Calvo, Avila-Reese, Barrow, Bharadwaj, Bharadwaj, Biggs, Bond, Bond, Bullock, Colberg, Colberg, Colless, Davis, Diaferio, Dietrich, Einasto, Eriksen, Finlator, Gao, González, Knollmann, Martínez, Mead, Navarro, Nelson D. Padilla, Novikov, Padilla, Pelupessy, Pimbblet, Pimbblet, Pivato, Porter, Roberto E. González, Sahni, Scharf, Shaap, Shandarin, Sousbie, Stoica, Stoica, Stoughton, Tittley, Voronoi, York, Zel'dovich, Zel'dovich, Zhang   +47 more
core   +1 more source

Speciation Through the Lens of Population Dynamics: A Theoretical Primer on How Small and Large Populations Diverge

Population Ecology, EarlyView.
Population size and dynamics fundamentally shape speciation by influencing genetic drift, founder events, and adaptive potential. Small populations may speciate rapidly due to stronger drift, whereas large populations harbor more genetic diversity, which can alter divergence trajectories. We highlight theoretical models that incorporate population size
Ryo Yamaguchi, Hidaka Kubo, Tokuya Ogawa, Hayate Omura   +3 more
wiley   +1 more source

Formation of the large-scale structure of the Universe [PDF]

Uspekhi Fizicheskih Nauk, 2011
In this review, the formation, evolution, and decay of the large-scale structure of the Universe is discussed in the context of observational data, numerical simulations, and the Cosmological Standard Model (CSM). Problems concerning measuring and interpreting cosmological parameters, determining the composition of matter, and normalizing density ...
V. N. Lukash, Aleksandr M. Malinovsky, Elena V. Mikheeva   +2 more
openaire   +4 more sources

The J-PLUS collaboration. Additive versus multiplicative systematics in surveys of the large scale structure of the Universe

The Open Journal of Astrophysics
Observational and/or astrophysical systematics modulating the observed number of luminous tracers can constitute a major limitation in the cosmological exploitation of surveys of the large scale structure of the universe.
C. Hernández‐Monteagudo, Giovanni Aricò, J. Chaves-Montero, L. Raul Abramo, P. Arnalte-Mur, A. Hernán-Caballero, F. J. Galindo-Guil, C. López-Sanjuán, Valerio Marra, Rodrigo von Marttens, E. Tempel, J. Cenarro, D. Cristóbal-Hornillos, A. Marín-Franch, M. Moles, J. Varela, H. Vázquez Ramió, J. S. Alcaniz, Renato A. Dupke, A. Ederoclite, L. Sodré, Raúl E. Angulo   +21 more
openalex   +2 more sources

Constraining cosmological ultra-large scale structure using numerical relativity [PDF]

, 2017
Cosmic inflation, a period of accelerated expansion in the early universe, can give rise to large amplitude ultra-large scale inhomogeneities on distance scales comparable to or larger than the observable universe.
Aguirre, Anthony, Braden, Jonathan, Johnson, Matthew C., Peiris, Hiranya V.   +3 more
core   +2 more sources

The epithelial barrier theory proposes a comprehensive explanation for the origins of allergic and other chronic noncommunicable diseases

FEBS Letters, EarlyView.
Exposure to common noxious agents (1), including allergens, pollutants, and micro‐nanoplastics, can cause epithelial barrier damage (2) in our body's protective linings. This may trigger an immune response to our microbiome (3). The epithelial barrier theory explains how this process can lead to chronic noncommunicable diseases (4) affecting organs ...
Can Zeyneloglu, Huseyn Babayev, Ismail Ogulur, Sena Ardicli, Yagiz Pat, Duygu Yazici, Bingjie Zhao, Lihong Chang, Xiaoqing Liu, Paolo D'Avino, Manru Li, Ceren Biçer, Fatma Hacer Kurtoğlu Babayev, Raja Dhir, Kari C. Nadeau, Marie‐Charlotte Brüggen, Mubeccel Akdis, Cezmi A. Akdis   +17 more
wiley   +1 more source

Observed Evidence for the Primordial Origin of Galaxy Sizes

The Astrophysical Journal
We present observational evidence supporting the scenario that the protogalactic angular momenta play an important role in molding the optical sizes of present galaxies. Analyzing the NASA-Sloan Atlas catalog in the redshift range of 0.02 ≤ z  
Jun-Sung Moon, Jounghun Lee
doaj   +1 more source