9 papers · ranked by Valyu relevance
V. Rusakov, D. Watson, G. P. Nikopoulos, G. Brammer + 13 more
The James Webb Space Telescope (JWST) has uncovered many compact galaxies at high redshift with broad hydrogen and helium lines, including the enigmatic population of little red dots (LRDs)1,2. The nature of these galaxies is debated and is attributed to supermassive black holes (SMBHs)3,4 or intense star formation5.…
Rohan P. Naidu, Jorryt Matthee, Harley Katz, Anna de Graaff + 50 more
The physical processes that led to the formation of billion-solar-mass black holes within the first 700 million years of cosmic time, a period known as cosmic dawn, remain a puzzle1. Several theoretical scenarios have been proposed to seed and rapidly grow black holes2-4, but direct observations of these mechanisms…
Nora Elisa Chisari
The alignments of galaxies across the large-scale structure of the Universe are known to be a source of contamination for gravitational lensing, but they can also probe cosmology and the physics of galaxy evolution in many ways. In this review, I cover developments in our understanding of intrinsic alignments over the…
José A Benavides, Laura V Sales, Andrew Wetzel, Jorge Moreno + 8 more
We study the morphology of hundreds of simulated central galaxies in the stellar mass range \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{upgreek} \usepackage{mathrsfs} \setlength{\oddsidemargin}{-69pt} \begin{document}…
Tsutomu T. Takeuchi, Suchetha Cooray, Ryusei R. Kano, Remo Garattini
Matter in the early Universe was nearly uniform, and galaxies emerged through the gravitational growth of small primordial density fluctuations. Astrophysics has been trying to unveil the complex physical phenomena that have caused the formation and evolution of galaxies throughout the 13-billion-year history of the…
Wiesław M. Macek, Dariusz Wójcik
We have recently argued that the expansion of the Universe is compatible not only with standard homogeneity, but also with fractal homogeneity in a hierarchical fractal cosmology. In this work we further test this paradigm using the galactic distances obtained from the Updated CfA Redshift Catalogs. We confirm that the…
Matthew Frosst, Danail Obreschkow, Aaron Ludlow, A Fraser-McKelvie
We analyse 307 Milky Way-mass disc galaxies in the TNG50 cosmological simulation to study the formation and evolution of stellar bars through secular processes and tidal interactions. About 90 per cent of these galaxies form at least one bar during their cosmic evolution. Most bars form rapidly in dynamically cold…
J. R. Szalay, E. Provornikova, E. Ayari, M. Bzowski + 18 more
The Interstellar Mapping and Acceleration (IMAP) mission probes the interaction between our heliosphere and the interstellar medium (ISM) in unprecedented detail. The broad science that IMAP addresses has been organized into three distinct science themes: A) Acceleration and the broader context of the solar wind and…
Max Gronke, Evan E. Schneider
Multiphase gas-ranging from cold molecular clouds ( $\lesssim 100\,$K) to hot, diffuse plasma ( $\gtrsim 10^6\,$K) is a defining feature of the interstellar, circumgalactic, intracluster, and intergalactic media. Accurately simulating its dynamics is critical to improving our understanding of galaxy formation and…