Results 1 to 10 of about 166,709,059 (292)

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

A New Wavelet Scattering Transform-based Statistic for Cosmological Analysis of Large-scale Structure

The Astrophysical Journal
Large-scale structure (LSS) analysis in galaxy surveys is a powerful cosmological probe but is limited by tracer bias, which can obscure underlying information and weaken parameter constraints.
Zhujun Jiang, Xiaolin Luo, Wenying Du, Zhiwei Min, Fenfen Yin, Longlong Feng, Jiacheng Ding, Le Zhang, Xiao-Dong Li   +8 more
doaj   +1 more source

Density-shear Baryon Acoustic Oscillation as a Cosmological Consistency Check

The Astrophysical Journal Letters
Tensions often arise between different data sets in cosmology, and consistency tests can serve as a powerful tool for diagnosing potential issues. Density-shear baryon acoustic oscillation (GI BAO) is the imprint of the BAO feature on the shear field ...
Kwan Chuen Chan, Yin Li, Jamie McCullough   +2 more
doaj   +1 more source

Cross Correlation between the Thermal Sunyaev–Zeldovich Effect and the Integrated Sachs–Wolfe Effect

The Astrophysical Journal Supplement Series
We present a joint cosmological analysis of the power spectra measurement of the Planck Compton parameter and the integrated Sachs–Wolfe (ISW) maps. We detect the statistical correlation between the Planck thermal Sunyaev–Zeldovich (tSZ) map and ISW data
Ayodeji Ibitoye, Wei-Ming Dai, Yin-Zhe Ma, Patricio Vielva, Denis Tramonte, Amare Abebe, Aroonkumar Beesham, Xuelei Chen   +7 more
doaj   +1 more source

From redshift to real space: Combining linear theory with neural networks

Astronomy & Astrophysics
Context. Spectroscopic redshift surveys are key to tracing the large-scale structure (LSS) of the Universe and testing the Λ Cold Dark Matter model. However, redshifts as distance proxies introduce distortions in the 3D galaxy distribution.
Maragliano Edoardo, Ganeshaiah Veena Punyakoti, Degni Giulia, Franco Branchini Enzo   +3 more
doaj   +1 more source

Spin Parity of Spiral Galaxies. VI. A Search for Dynamical Memory in the Spin Distribution of Galaxies in HSC WIDE Survey Regions

The Astronomical Journal
We analyzed the distribution of spin parity in spiral galaxies using the HSC DR2 data. The spiral winding parity of disk galaxies, observed as S-spiral or Z-spiral projected onto the sky plane, provides robust information on the sign of the line-of-sight
Masanori Iye, Masafumi Yagi
doaj   +1 more source

The DESI DR1 peculiar velocity survey: Growth rate measurements from the galaxy power spectrum

Astronomy & Astrophysics
The large-scale structure of the Universe and its evolution encapsulate a wealth of cosmological information. A powerful means of unlocking this knowledge lies in measuring the auto-power spectrum and/or the cross-power spectrum of the galaxy density and
Qin F., Blake C., Howlett C., Turner R. J., Lodha K., Bautista J., Lai Y., Amsellem A. J., Aguilar J., Ahlen S., Bianchi D., Brooks D., BenZvi S., Carr A., Chaussidon E., Claybaugh T., Cuceu A., de la Macorra A., Douglass K., Doel P., Ferraro S., Font-Ribera A., Forero-Romero J. E., Gaztañaga E., Gontcho A Gontcho S., Gutierrez G., Guy J., Herrera-Alcantar H. K., Honscheid K., Huterer D., Ishak M., Joyce R., Kim A. G., Kirkby D., Kisner T., Kremin A., Lahav O., Lamman C., Landriau M., Le Guillou L., Levi M. E., Manera M., Meisner A., Miquel R., Moustakas J., Muñoz-Gutiérrez A., Nadathur S., Palanque-Delabrouille N., Percival W. J., Poppett C., Prada F., Pérez-Ràfols I., Ross C., Rossi G., Sanchez E., Schlegel D., Said K., Schubnell M., Seo H., Silber J., Sprayberry D., Tarlé G., Weaver B. A., Zarrouk P., Zhou R., Zou H.   +65 more
doaj   +1 more source

Evolution of Cosmic Voids: Structure, Galaxies, and Dynamics

The Astrophysical Journal
We investigate the structural, photometric, and dynamical evolution of cosmic voids and their galaxy populations from z = 2.09 to the present, focusing on void size as a key evolutionary parameter.
Saeed Tavasoli
doaj   +1 more source

Assembly bias from nuisance to probe

Astronomy & Astrophysics
Context. Two-halo galactic conformity is commonly interpreted as a manifestation of galaxy assembly bias, but its statistical structure and physical origin remain unclear. Aims.
Padilla Nelson, Lacerna Ivan, Paz Dante
doaj   +1 more source

The large scale structure of the universe

Nuclear Physics B, 1985
Abstract Observational data on galaxies and clusters of galaxies are reviewed in the context of how they relate to the large scale structure of the Universe. Various methods of interpreting these data are discussed.
openaire   +1 more source