Results 31 to 40 of about 5,260 (217)
Optics Express, 2004 We demonstrate that microspheres above a substrate act as microscopic lenses. Their Brownian motion causes the focal point to change abruptly, thereby creating characteristic intensity fluctuations which depend on the interaction between the spheres. To this end, superparamagnetic spheres in a magnetic field assemble into long pearl chains, where the ...
L, Helseth, T, Fischer
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Gravitational Lensing of Continuous Gravitational Waves
Universe, 2021 Continuous gravitational waves are analogous to monochromatic light and could therefore be used to detect wave effects such as interference or diffraction. This would be possible with strongly lensed gravitational waves.
Marek Biesiada, Sreekanth Harikumar
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Microlensing by cosmic strings [PDF]
Monthly Notices of the Royal Astronomical Society, 2008 We consider the signature and detectability of gravitational microlensing of distant quasars by cosmic strings. Because of the simple image configuration such events will have a characteristic light curve, in which a source would appear to brighten by exactly a factor of two, before reverting to its original apparent brightness.
Kuijken, Konrad +2 more
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Galactic microlensing : binary-lens light curve morphologies and results from the Rosetta spacecraft bulge survey [PDF]
, 2014 For 20 years now, gravitational microlensing observations towards the Galactic bulge have provided us with a wealth of information about the stellar and planetary content of our Galaxy, which is inaccessible via other current methods.
Liebig, Christine Elisabeth
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Universe, 2018 The microlensing technique is a unique method to hunt for cold planets over a range of mass and separation, orbiting all varieties of host stars in the disk of our galaxy.
Jean-Philippe Beaulieu
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Prediction of Planet Yields by the PRime-focus Infrared Microlensing Experiment Microlensing Survey
The Astronomical Journal, 2023 The PRime-focus Infrared Microlensing Experiment (PRIME) will be the first to conduct a dedicated near-infrared microlensing survey by using a 1.8 m telescope with a wide field of view of 1.45 deg ^2 at the South African Astronomical Observatory.
Iona Kondo +5 more
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Microlensing of circumstellar envelopes III. Line profiles from stellar winds in homologous expansion [PDF]
, 2006 This paper examines line profile evolution due to the linear expansion of circumstellar material obsverved during a microlensing event. This work extends our previous papers on emission line profile evolution from radial and azimuthal flow during point ...
Bryce, H.M. +8 more
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Cloud-based e-Infrastructure for scheduling astronomical observations [PDF]
, 2015 This research was pursued under the EPSRC grant ‘Working Together: Constraint Programming and Cloud Computing’ (EP/K015745/1) and an Amazon Web Services (AWS) Education Research Grant.Gravitational microlensing exploits a transient phenomenon where an ...
Barker, Adam David +11 more
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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. +2 more
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Microlensing of Disk Sources [PDF]
The Astrophysical Journal, 1996 We analyse the effects on the predictions for the microlensing searches toward the Galactic bulge coming from the fact that not all the stars monitored belong to the bulge itself, but that a non--negligible fraction of them actually are in the Galactic disk.
Mollerach, S., Roulet, E.
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