Results 81 to 90 of about 33,060 (268)

Time delay of photons coupled to Weyl tensor in a regular phantom black hole

European Physical Journal C: Particles and Fields, 2020
Time delay of the photons coupled to the Weyl tensor in a regular phantom black hole is investigated in both weak and strong deflection gravitational lensing. We find that the time delay in the weak deflection lensing strongly depends on the phantom hair
Xu Lu, Yi Xie
doaj   +1 more source

Gravitational Lensing at Millimeter Wavelengths

, 2002
With today's millimeter and submillimeter instruments observers use gravitational lensing mostly as a tool to boost the sensitivity when observing distant objects.
A. Omont, A. Omont, A.C. Fabian, A.J. Barger, A.J. Barger, A.J. Barger, A.P. Rao, A.R. Patnaik, A.R. Patnaik, A.W. Blain, A.W. Blain, A.W. Blain, A.W. Blain, A.W. Blain, C. Borys, C. Ledoux, C. Lidman, C.D. Fassnacht, C.L. Carilli, C.L. Carilli, C.L. Carilli, C.L. Carilli, C.S. Kochanek, C.S. Kochanek, D. Alloin, D. Alloin, D. Alloin, D. Downes, D. Downes, D. Downes, D. Downes, D. Turnshek, D.B. Haarsma, D.B. Sanders, D.B. Sanders, D.B. Sanders, D.H. Hughes, D.H. Hughes, D.J. Fixsen, D.J. Wilner, D.L. Jauncey, D.L. Jauncey, D.T. Frayer, D.T. Frayer, D.T. Frayer, D.W. Hogg, E. Bertin, E. Egami, E.S. Perlman, F. Combes, F. Combes, F. Combes, F. Combes, F. Courbin, G. Lagache, G. Thuma, G.F. Lewis, G.F. Lewis, G.F. Lewis, G.L. Granato, G.L. Granato, H.A. Thronson, I. Smail, I. Smail, I. Smail, I. Smail, I.A.W. Browne, I.F. Mirabel, J. Lehár, J. Lehár, J. Pelt, J. Pelt, J. Pelt, J. Tonry, J.-L. Puget, J.-P. Kneib, J.-P. Kneib, J.A. Högbom, J.E.J. Lovell, J.E.J. Lovell, J.J. Swift, J.M. Mazzarella, J.N. Hewitt, K. Ohta, K.M. Menten, K.M. Menten, L.B. Lucy, L.L.R. Williams, L.V.E. Koopmans, L.V.E. Koopmans, M. Gerin, M. Lerner, M. Polletta, M. Rowan-Robinson, M. Ryle, M. Tsuboi, M.J. Irwin, M.S. Yun, N. Metropolis, N.Z. Scoville, N.Z. Scoville, N.Z. Scoville, P. Andreani, P. Cox, P. Magain, P. Papadopoulos, P. Schneider, P.M. Solomon, P.M. Solomon, P.M. Solomon, P.P. Papadopoulos, P.R. Bevington, R. Barkana, R. Barvainis, R. Barvainis, R. Barvainis, R. Barvainis, R. Gispert, R. Kayser, R. Siebenmorgen, R. Subrahmanyan, R.A. Edelson, R.A. Ibata, R.A. Windhorst, R.H. Hildebrand, R.J. Ivison, R.J. Ivison, R.J. Ivison, R.L. Brown, S. Eales, S. Eales, S. Guilloteau, S. Guilloteau, S. Nair, S. Wallington, S.E. Scott, S.G. Djorgovski, S.J.E. Radford, S.L. Ellison, T. Ommen van, T. Wiklind, T. Wiklind, T. Wiklind, T. Wiklind, T. Wiklind, T. Wiklind, T. Wiklind, T. Wiklind, T. Wiklind, T. Yamada, T.G. Phillips, T.J. Broadhurst, T.R. Lauer, T.T. Takeuchi, W. Xu, W.H. Press   +155 more
core   +3 more sources

Repeating Nuclear Transients From Repeating Partial Tidal Disruption Events

Astronomische Nachrichten, EarlyView.
ABSTRACT Extragalactic nuclear transients that exhibit repeating outbursts can be modeled as the repeated dynamical interaction between bound stars and supermassive black holes (SMBHs). A subset of these transients, with recurrence timescales of months‐to‐years, have been explained as accretion flares from the repeated tidal stripping of a star by an ...
Ananya Bandopadhyay, Eric R. Coughlin, Julia Fancher, C. J. Nixon, Dheeraj R. Pasham   +4 more
wiley   +1 more source

Strong gravitational lensing by Schwarzschild black holes

Astrophysics, 2008
13 pages, 3 ...
Bisnovatyi-Kogan, G. S., Tsupko, O. Yu.
openaire   +3 more sources

Witt’s Hyperbola Is Both Predicted and Observed to Pass Close to the Lensing Galaxies in Quadruple Quasars

The Astrophysical Journal
When a rectangular hyperbola is constructed from the image positions of a quadruply lensed quasar, as proposed by Witt, it passes very close to the lensing galaxy. The median measured perpendicular offset between the observed light center of the lens and
Paul L. Schechter, Richard Luhtaru
doaj   +1 more source

‘Fish in simulated water’? A Bourdieusian analysis of Chinese doctoral students' learning experiences in Southeast Asian developing countries

British Educational Research Journal, EarlyView.
Abstract International student mobility (ISM) has historically followed a pattern of movement from developing regions to developed countries. However, in recent years, there has been a noticeable increase in the number of Chinese students pursuing doctoral studies in Southeast Asian developing countries, an area that has received relatively little ...
Yueyang Zheng, Kun Dai, Alan C. K. Cheung   +2 more
wiley   +1 more source

Strong Gravitational Lensing and Dark Energy [PDF]

The Astrophysical Journal, 2001
We investigate the statistics of gravitational lenses in flat, low-density cosmological models with different cosmic equations of state w. We compute the lensing probabilities as a function of image separation θusing a lens population described by the mass function of Jenkins et al.
Sarbu, Nick, Rusin, David, Ma, Chung-Pei
openaire   +2 more sources

‘School is their whole world’: Teachers' perspectives on loneliness among children and adolescents from England and mainland China

British Educational Research Journal, EarlyView.
Abstract As front‐line observers and active participants in pupils' daily lives, teachers closely monitor pupils' social interactions, emotional states and behavioural changes. Their unique perspective enables them to detect problems in the social lives of their pupils that may not be immediately visible to peers, parents or mental health professionals.
Yixuan Zheng, Charlotte Bagnall, Caroline Bond, Elizabeth Birchinall, Pamela Qualter   +4 more
wiley   +1 more source

Strong gravitational lensing in a squashed Kaluza-Klein black hole spacetime

, 2010
We investigate the strong gravitational lensing in a Kaluza-Klein black hole with squashed horizons. We find the size of the extra dimension imprints in the radius of the photon sphere, the deflection angle, the angular position and magnification of the ...
E. Jung, Jiliang Jing, K. S. Virbhadra, Songbai Chen, Yue Liu   +4 more
core   +1 more source

Measuring what matters: Evaluating the impact of curriculum decolonisation initiatives in UK business schools

British Educational Research Journal, EarlyView.
Abstract Curriculum decolonisation has become a prominent feature of equity agendas in UK higher education, yet there remains limited empirical and theoretical work on how such initiatives are evaluated, particularly within business schools. This paper presents one of the first multi‐institutional empirical studies examining how UK business schools ...
Sally Everett, Rachael Carden, Kenisha Linton   +2 more
wiley   +1 more source