Results 1 to 10 of about 369 (182)
The Astronomical JournalThis study investigates orbital parallax in gravitational microlensing events, focusing on OGLE-2017-BLG-0103 and OGLE-2017-BLG-0192. For events with timescales ≤60 days, a Jerk-Parallax degeneracy arises due to high Jerk velocity ( $\tilde{{v}_{j ...
Sarang Shah
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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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Fractal Algorithm for Multiple-lens Analyses
The Astrophysical JournalA microlensing exoplanet search is a unique method for finding planets orbiting distant stars. However, in the past, the method used to analyze microlensing data could not deal with complex lens systems. The number of lenses was limited to three or less.
F. Abe
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Parallax Effect in Microlensing Events Due to Free-floating Planets
The Astronomical JournalOne of the most important applications of microlensing observations is the detection of free-floating planets (FFPs). The timescale of microlensing due to FFPs ( t _E ) is short (a few days). Discerning the annual parallax effect in observations of these
Parisa Sangtarash, Sedighe Sajadian
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How Rare Are TESS Free-floating Planets?
The Astrophysical Journal LettersRecently, Kunimoto et al. claimed that a short-lived signal in the Transiting Exoplanet Survey Satellite (TESS) Sector 61 database was possibly caused by a microlensing event with a terrestrial-mass free-floating planet (FFP) lens.
Hongjing Yang +5 more
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Gravitational microlensing in Verlinde's emergent gravity
Physics Letters B, 2017 We propose gravitational microlensing as a way of testing the emergent gravity theory recently proposed by Eric Verlinde [1]. We consider two limiting cases: the dark mass of maximally anisotropic pressures (Case I) and of isotropic pressures (Case II ...
Lei-Hua Liu, Tomislav Prokopec
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The Astrophysical JournalThe recently discovered gravitational-wave event GW231123 is the most massive binary black hole merger detected to date. The inferred source masses of the event fall within the pair-instability supernova mass gap, where black holes formed directly from ...
Aniruddha Chakraborty, Suvodip Mukherjee
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Binary-lens Microlensing Degeneracy: Impact on Planetary Sensitivity and Mass-ratio Function
The Astronomical JournalGravitational microlensing is a unique method for discovering cold planets across a broad mass range. Reliable statistics of the microlensing planets require accurate sensitivity estimates.
Yuxin Shang +7 more
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The Astrophysical JournalThe lensing of gravitational waves (GWs) due to intervening matter distribution in the Universe can lead to chromatic and achromatic signatures in the wave-optics and geometrical-optics limit, respectively.
Aniruddha Chakraborty, Suvodip Mukherjee
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The Astrophysical JournalGravitational microlensing in the wave-optics (WO) regime occurs when the Schwarzschild radius of a lensing object is comparable to or smaller than the wavelength of incoming gravitational waves (GWs), producing chromatic amplitude and phase modulations.
Aniruddha Chakraborty, Suvodip Mukherjee
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