Results 121 to 130 of about 33,635 (203)

Preliminary Evidence for Lensing-induced Alignments of High-redshift Galaxies in JWST-CEERS

The Astrophysical Journal
The majority of low-mass ( ${\mathrm{log}}_{10}{M}_{* }/{M}_{\odot }=9\mbox{--}10$ ) galaxies at high redshift ( z  > 1) appear elongated in projection. We use JWST-CEERS observations to explore the role of gravitational lensing in this puzzle.
Viraj Pandya, Abraham Loeb, Elizabeth J. McGrath, Guillermo Barro, Steven L. Finkelstein, Henry C. Ferguson, Norman A. Grogin, Jeyhan S. Kartaltepe, Anton M. Koekemoer, Casey Papovich, Nor Pirzkal, L. Y. Aaron Yung   +11 more
doaj   +1 more source

Cosmic Magnification of High-Redshift Submillimeter Galaxies

Galaxies
Weak lensing magnification probes the correlation between galaxies and the underlying matter field in a similar fashion to galaxy–galaxy lensing shear.
Marcos M. Cueli, Joaquín González-Nuevo, Laura Bonavera, Andrea Lapi   +3 more
doaj   +1 more source

KiDS-Legacy: Constraints on Horndeski gravity from weak lensing combined with galaxy clustering and cosmic microwave background anisotropies

Astronomy & Astrophysics
We present constraints on modified gravity from a cosmic shear analysis of the final data release of the Kilo-Degree Survey (KiDS-Legacy) in combination with DESI measurements of baryon acoustic oscillations, eBOSS observations of redshift space ...
Stölzner Benjamin, Reischke Robert, Grasso Matteo, Cataneo Matteo, Joachimi Benjamin, Loureiro Arthur, Spurio Mancini Alessio, Wright Angus H., Asgari Marika, Bilicki Maciej, Dvornik Andrej, Georgiou Christos, Giblin Benjamin, Heymans Catherine, Hildebrandt Hendrik, Joudaki Shahab, Kuijken Konrad, Li Shun-Sheng, Linke Laila, Mahony Constance, Moscardini Lauro, Porth Lucas, Radovich Mario, Tröster Tilman, von Wietersheim-Kramsta Maximilian, Yan Ziang, Yoon Mijin, Zhang Yun-Hao   +27 more
doaj   +1 more source

Cosmological Parameters from Cosmic Shear

, 2003
We present simulations of a cosmic shear survey and show how the survey geometry influences the accuracy of determination of cosmological parameters. We numerically calculate the full covariance matrices of the two-point statistics _+, _- and and use maximum likelihood and Fisher matrix analyses in order to derive expected constraints on the ...
openaire   +2 more sources

Unleashing cosmic shear information with the tomographic weak lensing PDF

The Open Journal of Astrophysics
In this work, we demonstrate the constraining power of the tomographic weak lensing convergence PDF for StageIV-like source galaxy redshift bins and shape noise.
Lina Castiblanco, Cora Uhlemann, Joachim Harnois-Déraps, Alexandre Barthelemy   +3 more
doaj   +1 more source

Sensitivity of Cosmological Parameter Estimation to Nonlinear Prescription from Cosmic Shear

The Astrophysical Journal
Several ongoing and upcoming large-scale structure surveys aim to explore the nonlinear regime of structure formation with high precision. Making reliable cosmological inferences from these observations necessitates precise theoretical modeling of the ...
Sarah Safi, Marzieh Farhang
doaj   +1 more source

Model Spectrum of Ultrahigh-energy Cosmic Rays Accelerated in FR-I Radio Galaxy Jets

The Astrophysical Journal
Nearby radio galaxies (RGs) of Fanaroff–Riley Class I (FR-I) are considered possible sites for the production of observed ultrahigh-energy cosmic rays (UHECRs). Among those, some exhibit blazar-like inner jets, while others display plume-like structures.
Jeongbhin Seo, Dongsu Ryu, Hyesung Kang
doaj   +1 more source

Fast radio bursts as a probe of gravity on cosmological scales

The Open Journal of Astrophysics
We explore the potential for improving constraints on gravity by leveraging correlations in the dispersion measure derived from Fast Radio Bursts (FRBs) in combination with cosmic shear.
Dennis Neumann, Robert Reischke, Steffen Hagstotz, Hendrik Hildebrandt   +3 more
doaj   +1 more source

Synthesis of Autofluorescent Phenanthrene Microparticles via Emulsification: A Useful Synthetic Mimic for Polycyclic Aromatic Hydrocarbon-Based Cosmic Dust. [PDF]

ACS Appl Mater Interfaces, 2023
Chan DHH, Wills JL, Tandy JD, Burchell MJ, Wozniakiewicz PJ, Alesbrook LS, Armes SP.   +6 more
europepmc   +1 more source

Synthetic Mimics for Nitrogen-Based Polycyclic Aromatic Hydrocarbon Cosmic Dust: Preparation and Preliminary Impact Ionization Mass Spectrometry Studies. [PDF]

J Am Chem Soc
Zeng M, Chan DHH, Armes SP, Mikula R, Fontanese J, Sternovsky Z.   +5 more
europepmc   +1 more source