Results 81 to 90 of about 11,137 (251)

Gravitational microlensing of planets: the influence of planetary phase and caustic orientation

, 2001
Recent studies have demonstrated that detailed monitoring of gravitational microlensing events can reveal the presence of planets orbiting the microlensed source stars.
Ashton, Ceri E., Lewis, Geraint F.
core   +1 more source

Gravitational microlensing of  -ray blazars [PDF]

Monthly Notices of the Royal Astronomical Society, 2003
We present a detailed study of the effects of gravitational microlensing on compact and distant γ-ray blazars. These objects have γ-ray-emitting regions that are small enough to be affected by microlensing effects produced by stars lying in intermediate galaxies.
D. F. Torres, G. E. Romero, E. F. Eiroa, J. Wambsganss, M. E. Pessah   +4 more
openaire   +1 more source

Gravitational Microlensing

, 2006
This review forms the microlensing part of the 33rd Saas-Fee Advanced Course "Gravitational Lensing: Strong, Weak & Micro'', which was held in April 2003 in Les Diablerets. It contains an introduction to the lensing effects of single and binary stars and it summarizes the state-of-the-art of microlensing observations and prospects at the time of ...
openaire   +2 more sources

Quasar Microlensing Statistics and Flux-ratio Anomalies in Lens Models

The Astronomical Journal
Precise lens modeling is a critical step in time delay studies of multiply imaged quasars, which are key for measuring some important cosmological parameters (especially H _0 ).
E. Mediavilla, J. Jiménez-Vicente, V. Motta   +2 more
doaj   +1 more source

GRAVITATIONAL MICROLENSING AND EXTENDED SOURCE MODELS

Odessa Astronomical Publications, 2014
We perform statistical simulations of light curves of extended microlensed sources having different brightness distribution in the source plane. We generated a set of realizations of lensing point mass system that takes into account an external shear ...
V. M. Sliusar, V. I. Zhdanov
doaj   +1 more source

Microlensing as a probe of the Galactic structure; 20 years of microlensing optical depth studies

, 2010
Microlensing is now a very popular observational astronomical technique. The investigations accessible through this effect range from the dark matter problem to the search for extra-solar planets. In this review, the techniques to search for microlensing
A. De Rújula, A. De Rújula, A. Einstein, A. Gould, A. Gould, A. Gould, A. Rest, A. Udalski, A. Udalski, A. Udalski, A. Udalski, A. Udalski, A. Udalski, B. Paczyński, B. Paczyński, C. Afonso, C. Afonso, C. Afonso, C. Afonso, C. Alard, C. Alard, C. Alard, C. Alcock, C. Alcock, C. Alcock, C. Alcock, C. Alcock, C. Alcock, C. Alcock, C. Alcock, C. Alcock, C. Alcock, C. Alcock, C. Hamadache, C. Han, C. Han, C. Renault, C. Renault, C.W. Stubbs, D.P. Bennett, E Aubourg, E. Aubourg, E. Dwek, E. Kerins, F. Derue, F. Derue, G. Gyuk, G.J. Feldman, H.-S. Zhao, H.T. Freudenreich, I.A. Bond, I.N. Reid, J-F. Glicenstein, J. Binney, J. Brand, J. Hart, J. Renn, J. Xu, J.P. Beaulieu, K. Griest, K. Griest, K.C. Sahu, K.C. Sahu, K.C. Sahu, K.Z. Stanek, L. Grenacher, L. Le Guillou, L. Mancini, L. Wyrzykowski, M. Zoccali, M.D. Albrow, Marc Moniez, N. Bissantz, N. Palanque-Delabrouille, N.W. Evans, N.W. Evans, P. Englmaier, P. Jetzer, P. Popowski, P. Schneider, P. Tisserand, P. Wozniak, P. Wozniak, P.L. Hammersley, P.L. Schechter, R. Ansari, R. Ansari, R. Ansari, R. Di Stefano, S. Calchi Novati, S. Calchi Novati, S. Calchi Novati, S. Dong, S. Liebes, S. Mao, S. Möllerach, S. Picaud, S. Rahvar, S.H. Rhie, S.J. Hardy, T. Lasserre, T. Sako, T. Sumi, T. Sumi, T. Sumi, T. Yanagisawa, V. Belokurov, V. Belokurov, W. Dehnen, Y. Muraki, Y.R. Rahal, Yoo.   +111 more
core   +3 more sources

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

Influence of Microlensing on Spectral Anomalies of the Lensed Objects

Open Astronomy, 2011
Here we consider the influence of microlensing on the spectrum of a lensed object with the angular size 5 μas accepting that the composite emission of this object originates from three different regions arranged around its center.
Simić S., Popović L. Č., Jovanović P.   +2 more
doaj   +1 more source

Gravitational microlensing research

, 1997
One of the most important problems in astrophysics concerns the nature of the dark matter in galactic halos, whose presence is implied mainly by the observed flat rotation curves in spiral galaxies. In the framework of a baryonic scenario the most plausible candidates are brown dwarfs, M-dwarfs or white dwarfs and cold molecular clouds (mainly of $H_2$)
openaire   +2 more sources

Fractal Algorithm for Multiple-lens Analyses

The Astrophysical Journal
A microlensing exoplanet search is a unique method for finding planets orbiting distant stars. However, in the past, the method used to analyze microlensing data could not deal with complex lens systems. The number of lenses was limited to three or less.
F. Abe
doaj   +1 more source