Results 21 to 30 of about 298,499 (308)
The Megamaser Cosmology Project. XIII. Combined Hubble Constant Constraints [PDF]
Astrophysical Journal, 2020 We present a measurement of the Hubble constant made using geometric distance measurements to megamaser-hosting galaxies. We have applied an improved approach for fitting maser data and obtained better distance estimates for four galaxies previously ...
D. Pesce +10 more
semanticscholar +1 more source
Cosmological impact of microwave background temperature measurements
Physics Letters B, 2022 The cosmic microwave background temperature is a cornerstone astrophysical observable. Its present value is tightly constrained, but its redshift dependence, which can now be determined until redshift z∼6.34, is also an important probe of fundamental ...
L. Gelo +3 more
doaj +1 more source
Cosmology with Multiple Galaxies [PDF]
Astrophysical Journal, 2023 Recent works have discovered a relatively tight correlation between Ωm and the properties of individual simulated galaxies. Because of this, it has been shown that constraints on Ωm can be placed using the properties of individual galaxies while ...
Chaitanya Chawak +5 more
semanticscholar +1 more source
Learning Cosmology and Clustering with Cosmic Graphs [PDF]
Astrophysical Journal, 2022 We train deep-learning models on thousands of galaxy catalogs from the state-of-the-art hydrodynamic simulations of the Cosmology and Astrophysics with MachinE Learning Simulations (CAMELS) project to perform regression and inference.
Pablo Villanueva-Domingo +1 more
semanticscholar +1 more source
The dipole of the astrophysical gravitational-wave background [PDF]
Journal of Cosmology and Astroparticle Physics, 2022 One of the main pillars of the ΛCDM model is the Cosmological Principle, which states that our Universe is statistically isotropic and homogeneous on large scales.
Lorenzo Valbusa Dall'Armi +2 more
semanticscholar +1 more source
CLASS_GWB: robust modeling of the astrophysical gravitational wave background anisotropies [PDF]
Journal of Cosmology and Astroparticle Physics, 2021 Gravitational radiation offers a unique possibility to study the large-scale structure of the Universe, gravitational wave sources and propagation in a completely novel way.
N. Bellomo +7 more
semanticscholar +1 more source
Cosmology with One Galaxy? [PDF]
Astrophysical Journal, 2022 Galaxies can be characterized by many internal properties such as stellar mass, gas metallicity, and star formation rate. We quantify the amount of cosmological and astrophysical information that the internal properties of individual galaxies and their ...
F. Villaescusa-Navarro +12 more
semanticscholar +1 more source
The CAMELS Project: Cosmology and Astrophysics with Machine-learning Simulations [PDF]
Astrophysical Journal, 2020 We present the Cosmology and Astrophysics with MachinE Learning Simulations (CAMELS) project. CAMELS is a suite of 4233 cosmological simulations of 25h−1Mpc3 volume each: 2184 state-of-the-art (magneto)hydrodynamic simulations run with the AREPO and ...
F. Villaescusa-Navarro +21 more
semanticscholar +1 more source
Entropy, 2014 We performed an in depth analysis of the subjects of entropy and the second law of thermodynamics and how they are treated in astrophysical systems. These subjects are retraced historically from the early works on thermodynamics to the modern statistical
Jeroen Schoenmaker
doaj +1 more source
The Atacama Cosmology Telescope: A Catalog of >4000 Sunyaev–Zel’dovich Galaxy Clusters [PDF]
Astrophysical Journal Supplement Series, 2020 We present a catalog of 4195 optically confirmed Sunyaev–Zel’dovich (SZ) selected galaxy clusters detected with signal-to-noise ratio >4 in 13,211 deg2 of sky surveyed by the Atacama Cosmology Telescope (ACT). Cluster candidates were selected by applying
M. Hilton +148 more
semanticscholar +1 more source