Results 1 to 10 of about 5,260 (217)

Weak microlensing [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society: Letters, 2010
Abstract A nearby star having a near-transit of a galaxy will cause a time-dependent weak lensing of the galaxy. Because the effect is small, we refer to this as weak microlensing. This could provide a useful method to weigh low-mass stars and brown dwarfs.
Coles, J, Saha, P, Schmid, H M
openaire   +4 more sources

Compressive Sensing Based Space Flight Instrument Constellation for Measuring Gravitational Microlensing Parallax

open access: yesSignals, 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, Asmita Korde-Patel
exaly   +3 more sources

Microlensing Searches for Exoplanets

open access: yesGeosciences, 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
exaly   +3 more sources

Studies of relativistic effects with radioastron space mission [PDF]

open access: yesSerbian Astronomical Journal, 2007
In the review we discuss possible studies of GR phenomena such as gravitational microlensing and shadow analysis with the forthcoming RadioAstron space mission.
Zakharov A.F.
doaj   +1 more source

Microlensing [PDF]

open access: yesPhysics Reports, 1997
Microlensing observations have now become a useful tool in searching for non--luminous astrophysical compact objects (brown dwarfs, faint stars, neutron stars, black holes and even planets). Originally conceived for establishing whether the halo of the Galaxy is composed of this type of objects, the ongoing searches are actually also sensitive to the ...
Roulet, E., Mollerach, S.
openaire   +2 more sources

Microlensing with Binaries and Planets [PDF]

open access: yesSymposium - International Astronomical Union, 1996
The ongoing microlensing experiments have now discovered more than 70 candidate events (Alcock et al. 1993, Bennett et al. 1994, Aubourg et al. 1993, Udalski et al. 1994). These experiments have put important constraints on the dark matter content of the Galactic halo (Alcock et al.
H.J. Witt, S. Mao
openaire   +3 more sources

The Impact of the Free-floating Planet Mass Function on the Event Rate for Accurate Microlensing Parallax Determination: Application to Euclid and Roman Parallax Observation

open access: yesThe Astronomical Journal, 2023
A microlensing event is mainly used to search for free-floating planets (FFPs). To estimate the FFP mass and distance via the microlensing effect, a microlensing parallax is one of the key parameters.
M. Ban
doaj   +1 more source

Discerning Parallax Amplitude in Astrometric Microlensing

open access: yesThe Astronomical Journal, 2023
Gravitational microlensing is a powerful method for discovering isolated stellar-mass black holes (ISMBHs). These objects make long-duration microlensing events.
Sedighe Sajadian   +2 more
doaj   +1 more source

60 Microlensing Events from the Three Years of Zwicky Transient Facility Phase One

open access: yesThe Astrophysical Journal, 2023
Microlensing events have historically been discovered throughout the Galactic bulge and plane by surveys designed solely for that purpose. We conduct the first multiyear search for microlensing events on the Zwicky Transient Facility (ZTF), an all-sky ...
Michael S. Medford   +4 more
doaj   +1 more source

Cosmological Microlensing [PDF]

open access: yesProceedings of The Manchester Microlensing Conference: The 12th International Conference and ANGLES Microlensing Workshop — PoS(GMC8), 2008
Variability in gravitationally lensed quasars can be due to intrinsic fluctuations of the quasar or due to ``microlensing'' by compact objects along the line of sight. If disentangled from each other, microlens-induced variability can be used to study two cosmological issues of great interest, the size and brightness profile of quasars on one hand, and
openaire   +3 more sources

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