Results 101 to 110 of about 49,845 (276)

Generating Dark Matter Subhalo Populations Using Normalizing Flows

The Open Journal of Astrophysics
Strong gravitational lensing is a powerful tool for probing the nature of dark matter, as lensing signals are sensitive to the dark matter substructure within the lensing galaxy.
Jack Lonergan, Andrew Benson, Daniel Gilman   +2 more
doaj   +1 more source

A comparison of approximate gravitational lens equations and a proposal for an improved new one

, 2008
Keeping the exact general relativistic treatment of light bending as a reference, we compare the accuracy of commonly used approximate lens equations. We conclude that the best approximate lens equation is the Ohanian lens equation, for which we present ...
A. O. Petters, K. S. Virbhadra, P. Schneider, S. Mollerach, S. Refsdal, V. Bozza, V. Perlick   +6 more
core   +1 more source

The Role of Intellectual Virtues in the Practice of Humanistic Mental Health Counseling

The Journal of Humanistic Counseling, EarlyView.
ABSTRACT The function of intellectual virtues as a foundation for the development of excellence in the humanistic practice of clinical mental health counseling is explored. First, the unique characteristics of intellectual virtues are described. Second, 10 specific intellectual virtues are identified and briefly defined.
Mark S. Gerig
wiley   +1 more source

Dark Matter Distinguished by Skewed Microlensing in the “Dragon Arc”

The Astrophysical Journal Letters
Many microlensed stars discovered by JWST closely follow the winding critical curve of A370 along the “Dragon Arc” with m _AB  > 26.5, which we show comprises asymptotic giant branch stars microlensed by the observed level of diffuse cluster stars ...
Tom Broadhurst, Sung Kei Li, Amruth Alfred, Jose M. Diego, Paloma Morilla, Patrick L. Kelly, Fengwu Sun, Masamune Oguri, Hayley Williams, Rogier Windhorst, Adi Zitrin, Katsuya T. Abe, Wenlei Chen, Liang Dai, Yoshinobu Fudamoto, Hiroki Kawai, Jeremy Lim, Tao Liu, Ashish K. Meena, Jose M. Palencia, George F. Smoot, Liliya L.R. Williams   +21 more
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

Gravitational Lenses

, 1999
The purpose of these lecture notes is to describe the gravitational lens effects in different astrophysical contexts. These notes are voluntarily focused on the fundamental mechanisms and the basic concepts that are useful to describe these effects. The observational consequences are presented in more details in accompanying notes by Y. Mellier.
openaire   +2 more sources

In Situ Acoustic Monitoring of Focused Femtosecond Pulse Duration in Air

Laser &Photonics Reviews, EarlyView.
Air‐breakdown acoustics at the laser focus is used to determine femtosecond pulse duration with a simple USB microphone. By chirp‐tuning and compressing 1030 nm pulses from 241 to 50 fs, the acoustic amplitude scales inversely proportional to the square root of the pulse duration, enabling in situ readout over 50 fs–5 ps—crucial for precise pulse ...
Indrė Meškėlaitė, Hsin‐Hui Huang, Haoran Mu, Nguyen Hoai An Le, Tomas Katkus, Edvinas Aleksandravičius, Gabrielius Kontenis, Domas Paipulas, Saulius Juodkazis, Darius Gailevičius   +9 more
wiley   +1 more source

The Influence of Plasma Lensing Magnification on the Luminosity Function of Fast Radio Bursts

The Astrophysical Journal
Small-scale clumps of ionized gas have been suggested by observations in the interstellar medium and the circumgalactic medium. The propagation of radio signals can be deflected by these plasma clumps, i.e., plasma lensing.
Xinzhong Er, Weishan Zhu, Shude Mao, Dongzi Li   +3 more
doaj   +1 more source

Gravitational lensing phenomena of Ellis-Bronnikov-Morris-Thorne wormhole with global monopole and cosmic string

Physics Letters B
In this paper, we theoretically investigate gravitational lensing within the space-time framework of traversable wormholes, focusing on the combined effects of a global monopole and a cosmic string.
Faizuddin Ahmed, İzzet Sakallı, Ahmad Al-Badawi   +2 more
doaj   +1 more source

Gravitational Lenses [PDF]

Symposium - International Astronomical Union, 1988
The gravitational lensing phenomenon is a new observational tool in cosmology. It appears to occur reasonably frequently; several thousand examples probably are observable with current radio and optical telescopes. A dozen or so reasonable candidates have been proposed, but it has become clear that one must apply strong tests to distinguish between ...
openaire   +1 more source