Results 41 to 50 of about 15,221 (204)

Scintillations And Microlensing [PDF]

Symposium - International Astronomical Union, 1996
It is shown how the theory of scintillation may be applied to treat gravitational lensing. The theory is applied to microlensing by a system of N point masses. It is shown that scintillation theory reproduces a known result for the angular broadening due to multiple microlensing.
openaire   +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

Constraints on the Abundance of Primordial Black Holes from X-Ray Quasar Microlensing Observations: Substellar to Planetary Mass Range

The Astrophysical Journal, 2023
We use X-ray observations of quasar microlensing (sensitive to smaller compact objects than in the optical) to study the possible presence of a population of low mass black holes (BHs; from ∼10 ^−3 M _⊙ to 10 ^−1 M _⊙ ) in lens galaxies. We compare these
A. Esteban-Gutiérrez, E. Mediavilla, J. Jiménez-Vicente, J. A. Muñoz   +3 more
doaj   +1 more source

Infrared-radio-follow-up observations for detection of the magnetic radio emission of extra solar planets: a new window to detect exoplanets

Frontiers in Astronomy and Space Sciences
There are several methods for indirectly detecting exoplanets, such as transit, radial velocity, astrometry, and the conventional gravitational microlensing approach.
Fatemeh Bagheri, Fatemeh Bagheri, Ramon E. Lopez, Amir Shahmoradi, Amir Shahmoradi   +4 more
doaj   +1 more source

New Constraints on Quasar Broad Absorption and Emission Line Regions from Gravitational Microlensing

Frontiers in Astronomy and Space Sciences, 2017
Gravitational microlensing is a powerful tool allowing one to probe the structure of quasars on sub-parsec scale. We report recent results, focusing on the broad absorption and emission line regions.
Damien Hutsemékers, Lorraine Braibant, Dominique Sluse, Timo Anguita, René Goosmann   +4 more
doaj   +1 more source

Lightcurve Classification in Massive Variability Surveys II: Transients towards the Large Magellanic Cloud

, 2004
Automatic classification of variability is now possible with tools like neural networks. Here, we present two neural networks for the identification of microlensing events -- the first discriminates against variable stars and the second against ...
Afonso, Afonso, Afonso, Alcock, Alcock, Alcock, Alcock, An, Antonello, Belokurov, Bennett, Bishop, Buchalter, Di Stefano, Dominik, Gould, Kerins, Lasserre, Lira, MacKay, MacKay, Mao, Mao, N. Wyn Evans, Nabney, Paczyński, Palanque-Delabrouille, Phillips, Press, Saerens, Vasily Belokurov, Welch, Yann Le Du   +32 more
core   +1 more source

Optimal Survey Strategies and Predicted Planet Yields for the Korean Microlensing Telescope Network [PDF]

, 2014
The Korean Microlensing Telescope Network (KMTNet) will consist of three 1.6m telescopes each with a 4 deg^{2} field of view (FoV) and will be dedicated to monitoring the Galactic Bulge to detect exoplanets via gravitational microlensing.
Gaudi, B. Scott, Gould, Andrew P., Han, Cheongho, Henderson, Calen B., Nataf, David, Penny, Matthew T., Skowron, Jan   +6 more
core   +3 more sources

Microlensed microchip VECSEL

Optics Express, 2007
We report a 1.055-mum microchip VECSEL array which uses a microlens-patterned diamond both as a heatspreader and as an array of concave output mirrors. This configuration, which is suitable for laser array operation, is here exploited to perform a systematic study of a set of microchip lasers with the same semiconductor structure but different cavity ...
Laurand, Nicolas, Lee, Chee Leong, Gu, Erdan, Hastie, Jennifer, Calvez, Stephane, Dawson, Martin   +5 more
openaire   +3 more sources

Difference Image Analysis of Galactic Microlensing I. Data Analysis

, 1999
This is a preliminary report on the application of Difference Image Analysis (DIA) to galactic bulge images. The aim of this analysis is to increase the sensitivity to the detection of gravitational microlensing.
A. C. Becker, A. J. Drake, A. Tomaney, Alard C., Alard C., Alard C., Ansari R., B. A. Peterson, Bailion P., Beaulieu J. P., C. Alcock, C. W. Stubbs, D. Alves, D. L. Welch, D. Minniti, D. P. Bennett, Dominik M., K. C. Freeman, K. Griest, K. H. Cook, M. J. Lehner, M. R. Pratt, Marshall S., Melchior A.-L., Nemiroff R. J., P. J. Quinn, R. A. Allsman, S. L. Marshall, T. S. Axelrod, T. Vandehei, Udalski A., W. Sutherland   +31 more
core   +1 more source

Microlensing of the broad line region in 17 lensed quasars [PDF]

, 2012
When an image of a strongly lensed quasar is microlensed, the different components of its spectrum are expected to be differentially magnified owing to the different sizes of the corresponding emitting region.
Courbin, F., Hutsemékers, D., Meylan, G., Sluse, D., Wambsganss, J.   +4 more
core   +2 more sources