Results 1 to 10 of about 10,461 (185)
Defocusing gravitational microlensing [PDF]
Physica Scripta, 1996 We introduce the notion of defocusing gravitational lens considering a MACHO located behind a light source with respect to an observer. The consequence of defocusing effect is a temporal variability of star luminosity which produces a gap instead of a ...
A A Marino +22 more
core +5 more sources
Microlensing Searches for Exoplanets
Geosciences, 2018 Gravitational microlensing finds planets through their gravitational influence on the light coming from a more distant background star. The presence of the planet is then inferred from the tell-tale brightness variations of the background star during the
Yiannis Tsapras
doaj +3 more sources
Strong Gravitational Lensing and Microlensing of Supernovae. [PDF]
Space Sci RevAbstractStrong gravitational lensing and microlensing of supernovae (SNe) are emerging as a new probe of cosmology and astrophysics in recent years. We provide an overview of this nascent research field, starting with a summary of the first discoveries of strongly lensed SNe. We describe the use of the time delays between multiple SN images as a way to
Suyu SH +4 more
europepmc +5 more sources
Magellanic cloud gravitational microlensing results: What do they mean? [PDF]
Physics Reports, 1998 I review recent results from gravitational microlensing surveys of the Large Magellanic Cloud. The combined microlensing optical depth of the MACHO and EROS-1 surveys is tau_LMC = 2.1{+1.3/-0.8}* 10^{-7} which is substantially larger than the background ...
D P Bennett
exaly +4 more sources
Signals, 2022 In this work, we provide a compressive sensing architecture for implementing on a space based observatory for detecting transient photometric parallax caused by gravitational microlensing events.
Richard K Barry
exaly +3 more sources
Higher order corrections in gravitational microlensing [PDF]
Physics Letters, Section A: General, Atomic and Solid State Physics, 1999 We show that, in cosmological microlensing, corrections of order $v/c \sim Δλ/λ$, to the deflection angle of light beams from a distant source are not negligible and that all microlensing quantities should be corrected up to this order independently of the cosmological model used.
Salvatore Capozziello +1 more
exaly +5 more sources
GRAVITATIONAL MICROLENSING IN THE LOCAL GROUP [PDF]
Annual Review of Astronomy and Astrophysics, 1996 ▪ Abstract The status of searches for gravitational microlensing events of the stars in our galaxy and in other galaxies of the Local Group, the interpretation of the results, some theory, and prospects for the future are reviewed. The searches have already unveiled ∼ 100 events, at least two of them caused by binaries, and have already proven to be ...
exaly +3 more sources
Gravitational wave detection through microlensing? [PDF]
Monthly Notices of the Royal Astronomical Society, 2003 It is shown that accurate photometric observations of a relatively high--magnification microlensing event ($A\gg 1$), occurring close to the line of sight of a gravitational wave (GW) source, represented by a binary star, can allow the detection of subtle gravitational effects.
Roberto Ragazzoni
exaly +3 more sources
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.
D Sluse, T Anguita
exaly +3 more sources
Gravitational Microlensing by the MACHOs of the LMC
, 1993 The expected microlensing events of the LMC by the MACHOs of the LMC itself are calculated and compared with analogue events by objects in the Galactic halo. The LMC matter distribution is modelled by a spherical halo and an exponential disk while a face-
Wu, Xiang-Ping
core +3 more sources