Results 121 to 130 of about 706,236 (203)

Forecasts on the dark energy anisotropic stress for the esa euclid survey [PDF]

The cosmological constant Λ seems to be a not satisfactory explanation of the late-time accelerated expansion of the Universe, for which a number of experimental evidences exist; therefore, it has become necessary in the last years to consider ...
Fogli, Simone
core  

Simulating Image Coaddition with the Nancy Grace Roman Space Telescope. IV. Hyperparameter Optimization and Experimental Features

The Astrophysical Journal
For weak gravitational lensing cosmology with the forthcoming Nancy Grace Roman Space Telescope, image coaddition (or construction of oversampled images from undersampled ones) is a critical step in the image processing pipeline.
Kaili Cao, Christopher M. Hirata, Katherine Laliotis, Masaya Yamamoto, Emily Macbeth, M. A. Troxel, (Roman HLIS Cosmology PIT)   +6 more
doaj   +1 more source

Supermassive Dark Star candidates seen by JWST. [PDF]

Proc Natl Acad Sci U S A, 2023
Ilie C, Paulin J, Freese K.
europepmc   +1 more source

Image properties in gravitational lensing

, 2022
Při gravitačním čočkování dochází k odklonu paprsků ze vzdáleného zdroje světla vlivem gravitace jiného astrofyzikálního objektu ležícího v jeho popředí.
Nicola Trakslová
core  

Low-redshift Analogs of Cosmic Noon Galaxies as Laboratories for Clumpy Star Formation

The Astrophysical Journal
It has been established that a significant fraction of star formation at high redshift occurs in clumpy galaxies. The properties of clumps and their formation mechanisms, however, remain highly debated. In this work we analyze a sample of 18 supercompact
Jorge M. Santos-Junior, Thiago S. Gonçalves, Luidhy Santana-Silva, Arianna Cortesi, Karin Menendez-Delmestre, Amanda E. Araujo-Carvalho   +5 more
doaj   +1 more source

Detection of early-universe gravitational-wave signatures and fundamental physics. [PDF]

Gen Relativ Gravit, 2022
Caldwell R, Cui Y, Guo HK, Mandic V, Mariotti A, No JM, Ramsey-Musolf MJ, Sakellariadou M, Sinha K, Wang LT, White G, Zhao Y, An H, Bian L, Caprini C, Clesse S, Cline JM, Cusin G, Fornal B, Jinno R, Laurent B, Levi N, Lyu KF, Martinez M, Miller AL, Redigolo D, Scarlata C, Sevrin A, Haghi BSE, Shu J, Siemens X, Steer DA, Sundrum R, Tamarit C, Weir DJ, Xie KP, Yang FW, Zhou S.   +37 more
europepmc   +1 more source

CANUCS: An Updated Mass and Magnification Model of A370 with JWST

The Astrophysical Journal
We present an updated mass and magnification model of galaxy cluster A370 using new NIRCam, NIRISS, and NIRSpec data from the Canadian NIRISS Unbiased Cluster Survey (CANUCS).
Rachel Gledhill, Victoria Strait, Guillaume Desprez, Gregor Rihtaršič, Maruša Bradač, Gabriel Brammer, Chris J. Willott, Nicholas Martis, Marcin Sawicki, Gaël Noirot, Ghassan T. E. Sarrouh, Adam Muzzin   +11 more
doaj   +1 more source

Accurate Measurement of the Lensing Magnification by BOSS CMASS Galaxies and Its Implications for Cosmology and Dark Matter

The Astrophysical Journal
Magnification serves as an independent and complementary gravitational lensing measurement to shear. We develop a novel method to achieve an accurate and robust magnification measurement around BOSS CMASS galaxies across physical scales of 0.016 h ^−1 ...
Kun Xu, Y. P. Jing, Hongyu Gao, Xiaolin Luo, Ming Li   +4 more
doaj   +1 more source

Gravitational Lensing Effect on Cosmic Microwave Background

, 2007
Matter distribution in the Universe can cause the gravitational lensing effect, which would contaminate the cosmic microwave background (CMB) pattern we have observed today.
Wang, Fu-Cheng, 王富正
core  

Polarized thermal emission from dust in a galaxy at redshift 2.6. [PDF]

Nature, 2023
Geach JE, Lopez-Rodriguez E, Doherty MJ, Chen J, Ivison RJ, Bendo GJ, Dye S, Coppin KEK.   +7 more
europepmc   +1 more source