Results 91 to 100 of about 65,765 (275)

Gravitational lensing by a dark compact object in modified gravity and observational constraints from Einstein rings

open access: yesEuropean Physical Journal C: Particles and Fields
In this manuscript, we provide a comprehensive study of gravitational lensing by dark compact objects predicted by modified gravity (MOG) based on the scalar–vector–tensor action, with the aim of providing new insights into the nature of gravitational ...
Nagina Rehman   +3 more
doaj   +1 more source

ВЛИЯНИЕ ГРАВИТАЦИОННОГО ЛИНЗИРОВАНИЯ НА ФУНКЦИЮ СВЕТИМОСТИ КВАЗАРОВ

open access: yesOdessa Astronomical Publications, 2011
The function of quasar distribution on apparent brightness is discussed. This function is found on base of suggestion that quasars, at least partly, are strong gravitational lensing images of the active nuclei of distant galaxies.
Ю. Л. Бухмастова
doaj   +1 more source

Weak Gravitational Lensing by a Sample of X-Ray Luminous Clusters of Galaxies -- II. Comparison with Virial Masses

open access: yes, 2002
Dynamic velocity dispersion and mass estimates are given for a sample of five X-ray luminous rich clusters of galaxies at intermediate redshifts (z~0.3) drawn from a sample of 39 clusters for which we have obtained gravitational lens mass estimates.
Adami C.   +14 more
core   +1 more source

Navigating the Twin Transformation: How Digitalization and Sustainability Shape the Future

open access: yesStrategic Change, EarlyView.
ABSTRACT Amid growing societal and scholarly interest in the interplay between sustainability transformation (ST) and digital transformation (DT), this study conducts a systematic literature review to advance the understanding of twin transformation (TT). Analyzing 65 peer‐reviewed articles, this review makes three key contributions: (1) It synthesizes
Jonas Hammerschmidt   +4 more
wiley   +1 more source

Weak Gravitational Lensing in Fourth Order Gravity

open access: yes, 2011
For a general class of analytic $f(R,R_{\alpha\beta}R^{\alpha\beta},R_{\alpha\beta\gamma\delta}R^{\alpha\beta\gamma\delta})$ we discuss the gravitational lensing in the Newtonian Limit of theory.
Stabile, A., Stabile, An.
core   +1 more source

Galaxy–galaxy weak gravitational lensing in $f(R)$ gravity [PDF]

open access: yes, 2017
We present an analysis of galaxy–galaxy weak gravitational lensing (GGL) in chameleon f(R) gravity – a leading candidate of non-standard gravity models. For the analysis, we have created mock galaxy catalogues based on dark matter haloes from two sets of
Baojiu Li   +3 more
semanticscholar   +1 more source

Intuition–Driven Prospection and Uncertainty Misalignment: Sources of Entrepreneurial Agency Problems in Ventures

open access: yesStrategic Change, EarlyView.
ABSTRACT Start‐up CEOs are usually more aligned with the interests of the venture board compared to CEOs in legacy firms, and therefore it is usual to conclude that the traditional agency problem is lower in ventures. In this article, it is argued that this is only half of the story, and that the agency problem is reversed in early ventures such that ...
Glenn Kristiansen
wiley   +1 more source

The galaxy-subhalo connection in low-redshift galaxy clusters from weak gravitational lensing [PDF]

open access: yes, 2017
We measure the gravitational lensing signal around satellite galaxies in a sample of galaxy clusters at ...
C. Sif'on   +4 more
semanticscholar   +1 more source

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