Results 11 to 20 of about 11,137 (251)

Gravitational Microlensing of Fractal Sources [PDF]

Monthly Notices of the Royal Astronomical Society, 2004
Gravitational microlensing has proven to be a powerful tool in the study of quasars, providing some of the strongest limits on the scales of structure in the central engine. Typically sources are considered to be smoothly varying on some particular scale;
Abajas, Abramenko, Agol, Alcock, Alcock, Bottorff, Bottorff, Burlaga, Campo Bagatin, Chang, Dai, Datta, Durrer, Elmegreen, Elmegreen, Elmegreen, Elmegreen, Fluke, Fogel, Geraint F. Lewis, Goodwin, Janßen, Kayser, Kochanek, Lekshmi, Lewis, Lewis, Lewis, Merloni, Merloni, Nemiroff, Peitgen, Peitgen, Popović, Rauch, Richards, Salakhutdinova, Schneider, Schneider, Semelin, Stenflo, Stepinski, Stutzki, Veronig, Wambsganss, Wambsganss, Witt, Wright, Wyithe, Wyithe, Yonehara, Yonehara, Yonehara   +52 more
core   +3 more sources

Analytical Methods in Gravitational Microlensing [PDF]

ISRN Astronomy and Astrophysics, 2012
We discuss analytical results dealing with photometric and astrometric gravitational microlensing. The first two sections concern approximation methods that allow us to get solutions of the general lens equation near fold caustics and cusp points up to any prescribed accuracy.
{Zhdanov} V.~I., {Alexandrov} A.~N., {Fedorova} E.~V., {Sliusar} V.~M.   +3 more
openaire   +2 more sources

Estimating Finite Source Effects in Microlensing Events due to Free-Floating Planets with the Euclid Survey

Advances in Astronomy, 2015
In recent years free-floating planets (FFPs) have drawn a great interest among astrophysicists. Gravitational microlensing is a unique and exclusive method for their investigation which may allow obtaining precious information about their mass and ...
Lindita Hamolli, Mimoza Hafizi, Francesco De Paolis, Achille A. Nucita   +3 more
doaj   +2 more sources

Gravitational Microlensing by the Ellis Wormhole [PDF]

The Astrophysical Journal, 2010
A method to calculate light curves of the gravitational microlensing of the Ellis wormhole is derived in the weak-field limit. In this limit, lensing by the wormhole produces one image outside the Einstein ring and one other image inside.
Alcock, Alcock, Alcock, Bennett, Bond, Das, F. Abe, Gould, Lobo, Poindexter, Rahaman, Refsdal, Schneider, Sumi, Udalski, Visser   +15 more
core   +2 more sources

Real-Time Detection Of Gravitational Microlensing [PDF]

Symposium - International Astronomical Union, 1996
Real-time detection of microlensing has moved from proof of concept in 1994 (Udalski et al. 1994a, Alcock et al. 1994) to a steady stream of events this year. Global dissemination of these events by the MACHO and OGLE collaborations has made possible intensive photometric and spectroscopic follow up from widely dispersed sites confirming the ...
M. R. Pratt, C. Alcock, R. A. Allsman, D. R. Alves, T. S. Axelrod, A. C. Becker, D. P. Bennett, K. H. Cook, K. C. Freeman, K. Griest, J. Guern, M. J. Lehner, S. L. Marshall, B. A. Peterson, P. J. Quinn, David J. Reiss, A. W. Rodgers, C. W. Stubbs, William J. Sutherland, D. L. Welch   +19 more
openalex   +3 more sources

Finding planets via gravitational microlensing [PDF]

This preprint will be published in: Handbook of Exoplanets 2nd edition, edited by Hans Deeg and Juan Antonio Belmonte, Springer Nature Switzerland AG, reproduced with permission of Springer Nature Switzerland ...
Natalia E. Rektsini, V. Batista
openalex   +3 more sources

Magnetic Manipulation of Superparamagnetic Colloids in Droplet‐Based Optical Devices

Advanced Optical Materials, Volume 11, Issue 21, November 6, 2023., 2023
Colloidal particles inside droplets are assembled and manipulated using an external magnetic field to create magnetically controlled active microlenses and optical shutters. Using monodisperse microfluidic droplets, the assembly of particles into 2D clusters is systematically investigated and exploited to manipulate light.
Iacopo Mattich, Joan Sendra, Henning Galinski, Golnaz Isapour, Ahmet F. Demirörs, Marco Lattuada, Simone Schuerle, André R. Studart   +7 more
wiley   +1 more source

Ultra wide‐field infrared astronomy in Antarctica

Astronomische Nachrichten, Volume 344, Issue 8-9, October-November 2023., 2023
The science enabled by the deep and high‐cadence survey that will be performed by the Vera Rubin Observatory has led to an increase of survey and follow‐up capabilities around the world. The infrared, has however, not match this growth due to the challenges caused by the atmospheric and the cost of large detector arrays.
Tony Travouillon, Roger M. Smith, Jason Fucik, Don F. Figer, Mansi Kasliwal, Anna M. Moore, Tristan Guillot   +6 more
wiley   +1 more source

Characteristic Features of Gravitational Wave Lensing as Probe of Lens Mass Model

Annalen der Physik, Volume 535, Issue 6, June 2023., 2023
The gravitational lensing of gravitational waves is an expanding field in astronomy and cosmology. It might contribute to solving many different issue in these fields. To exploit its potential, first of all, one needs to recognize and model a gravitational wave event properly.
Paolo Cremonese, David Fonseca Mota, Vincenzo Salzano   +2 more
wiley   +1 more source

Gravitational Microlensing [PDF]

Proceedings of the International Astronomical Union, 2011
AbstractGravitational microlensing is a well established and unique field of time-domain astrophysics. For two decades microlensing surveys have been regularly observing millions of stars to detect elusive events that follow a characteristic Paczyński lightcurve.
Wyrzykowski, Ł., Moniez, M., Horne, K., Street, R.   +3 more
openaire   +2 more sources