Results 21 to 30 of about 9,232,537 (75)
, 2017 In the next future, astrometric microlensing will offer a new channel for investigating the nature of both lenses and sources involved in a gravitational microlensing event.
A. A. Nucita +9 more
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Primordial Black Hole Dark Matter Simulations Using PopSyCLE
The Astrophysical JournalPrimordial black holes (PBHs), theorized to have originated in the early Universe, are speculated to be a viable form of dark matter. If they exist, they should be detectable through photometric and astrometric signals resulting from gravitational ...
Kerianne Pruett +8 more
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On the use of Gaia for astrometric microlensing [PDF]
, 2020 Astrometric microlensing is a unique tool to directly determine the mass of an individual star(“lens”). By measuring the astrometric shift of a background source in combination with precise predictions of its unlensed position as well as of the lens ...
Klüter, Jonas
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The BAGLE Python Package for Bayesian Analysis of Gravitational Lensing Events
The Astronomical JournalWe present the open-source Python package, Bayesian Analysis of Gravitational Lensing Events (BAGLE), which enables modeling and joint fitting of photometric and astrometric data sets. We describe the model parameterizations and present the equations for
J. R. Lu +11 more
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The Astrophysical JournalGravitational microlensing surveys potentially discover isolated black holes (IBHs) at large distances through their gravitational effects on the apparent brightness and motion of collinear stars.
Sedighe Sajadian, Martín Makler
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Prediction of Astrometric and Timing Microlensing Events with Pulsars by ATNF Catalog and Gaia DR3
The Astrophysical JournalDetermining the mass of neutron stars is crucial for understanding their formation, evolution, and interior structure. Currently, only a few dozen neutron stars have had their masses measured, and most of them belong to binary systems. However, there are
Xu Lu, Yi Xie
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Astrometric Microlensing by Primordial Black Holes with The Roman Space Telescope [PDF]
, 2023 Primordial Black Holes (PBHs) could explain some fraction of dark matter and shed light on many areas of early-universe physics. Despite over half a century of research interest, a PBH population has so far eluded detection.
Abrams, Natasha S +7 more
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Prediction of astrometric microlensing events during theGaiamission
, 2011 We identify stars with large proper motions that are potential candidates for the astrometric microlensing effect during the Gaia mission i.e. between 2012 and 2019. The effect allows a precise measurement of the mass of a single star that is acting as a
J. Wambsganss, S. Proft, M. Demleitner
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A Search for Predicted Astrometric Microlensing Events by Nearby Brown Dwarfs
, 2022 Gravitational microlensing has the potential to provide direct gravitational masses of single, free-floating brown dwarfs, independent of evolutionary and atmospheric models. The proper motions and parallaxes of nearby brown dwarfs can be used to predict
Skemer, Andrew J. +5 more
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A possible nearby microlensing stellar remnant hiding in
, 2022 Massive galactic lenses with large Einstein Radii should cause a measurable astrometric microlensing effect, that is, a light centroid shift due to the motion of the two images.
Penoyre, Zephyr +11 more
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