Results 81 to 90 of about 69,883 (320)

Velocity effects on second order contributions to gravitational frequency shift by a moving Kerr–Newman black hole

European Physical Journal C: Particles and Fields, 2019
The significance of the radial velocity effects on the leading-order gravitational frequency shift in some special cases was reported recently. This paper investigates the gravitational shift of frequency of light propagating in the equatorial plane of a
Guansheng He, Chaohong Pan, Wenbin Lin
doaj   +1 more source

Lensing galaxies: light or dark? [PDF]

, 1998
In a recent paper, Hawkins (1997) argues on the basis of statistical studies of double-image gravitational lenses and lens candidates that a large population of dark lenses exists and that these outnumber galaxies with more normal mass-to-light ratios by
Browne, I. W. A., Fassnacht, C. D., Helbig, P., Jackson, N., Koopmans, L. V. E., Marlow, D. R., Wilkinson, P. N.   +6 more
core   +3 more sources

A gamified formative question bank to enhance student learning and engagement in a foundational medical science course

Anatomical Sciences Education, EarlyView.
Abstract While gamified learning platforms show promise for engaging digital learners and promoting active learning, evidence of their effectiveness in predicting academic outcomes remains limited. This study examined how engagement patterns and incentives impact academic outcomes in a gamified environment to determine whether a formative question bank
Mohammad Aldalou, Angel Laboy, Laura E. Fraser, Jeremey Walker, William S. Brooks, Brook Hubner   +5 more
wiley   +1 more source

Detecting Dark Objects with Plasma Microlensing by Their Gravitational Wakes

The Astrophysical Journal
A moving mass makes a gravitational wake in the partially ionized interstellar medium, which acts as a lens for radio-frequency light. Consequently, plasma microlensing could complement gravitational microlensing in the search for invisible massive ...
M. Sten Delos
doaj   +1 more source

LenNet: direct detection and localization of strong gravitational lenses in wide-field sky survey images

Frontiers in Astronomy and Space Sciences
Strong gravitational lenses are invaluable for tackling fundamental astrophysics questions, such as the nature of dark matter and cosmic expansion.
Pufan Liu, Pufan Liu, Hui Li, Ziqi Li, Ziqi Li, Xiaoyue Cao, Xiaoyue Cao, Xiaoyue Cao, Rui Li, Hao Su, Ran Li, Nicola R. Napolitano, Léon V. E. Koopmans, Valerio Busillo, Crescenzo Tortora, Liang Gao, Liang Gao   +16 more
doaj   +1 more source

Becoming inclusive: Developing pre‐service teachers' orientations towards their practice in Scotland

The Curriculum Journal, EarlyView.
Abstract This article presents findings, from a case study with a cohort of third‐year undergraduate pre‐service teachers (PSTs) in Scotland, regarding their ideas about inclusion and curricular justice, as they concurrently encountered practice and theory.
Andrea Priestley, Stella Mouroutsou, Nuzhat Uthmani   +2 more
wiley   +1 more source

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

European 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, Zoe C. S. Chan, Mubasher Jamil, Mustapha Azreg-Aïnou   +3 more
doaj   +1 more source

A test of the evolution of gas depletion factor in galaxy clusters using strong gravitational lensing systems

European Physical Journal C: Particles and Fields, 2022
In this work, we discuss a new method to probe the redshift evolution of the gas depletion factor, i.e. the ratio by which the gas mass fraction of galaxy clusters is depleted with respect to the universal mean of baryon fraction.
R. F. L. Holanda, Kamal Bora, Shantanu Desai   +2 more
doaj   +1 more source

Separability of rotational effects on a gravitational lens

Physical Review D, 2003
12 pages (RevTeX); accepted for publication in Phys.
Hideki Asada, Tatsuya Yamamoto, Masumi Kasai   +2 more
openaire   +3 more sources

Wetlands as environments of early human occupation: A new classification for freshwater palaeowetlands

The Depositional Record, EarlyView.
A new classification for inland freshwater palaeowetlands to be used in the field or core laboratory by sedimentologists, providing examples from the Guadix Basin (southern Spain). Abstract Present wetlands have proven to be delicate, biodiverse ecosystems, that are natural sinks for CO2 and act as good indicators for climate changes.
S. Pla‐Pueyo, E. H. Gierlowski‐Kordesch   +1 more
wiley   +1 more source