Systematic KMTNet Planetary Anomaly Search. X. Complete Sample of 2017 Prime-field Planets
The Astronomical JournalWe complete the analysis of planetary candidates found by the KMT AnomalyFinder for the 2017 prime fields that cover ∼13 deg ^2 . We report three unambiguous planets: OGLE-2017-BLG-0640, OGLE-2017-BLG-1275, and OGLE-2017-BLG-1237.
Yoon-Hyun Ryu +45 more
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Gravitational Microlensing by a Galactic Bar
The Astronomical Journal, 1995 Observations have found that the microlensing optical depth in the direction of the galactic center is larger than theoretical predictions. Here we investigate the effect a galactic bar has on microlensing. We use two models for the bar in order to find the range of microlensing predications.
openaire +1 more source
Residual Test to Search for Microlensing Signatures in Strongly Lensed Gravitational Wave Signals
The Astrophysical JournalWhen a gravitational wave signal encounters a massive object, such as a galaxy or galaxy cluster, it undergoes strong gravitational lensing, producing multiple copies of the original signal.
Eungwang Seo +5 more
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Estimating Microlensing Parameters from Observables and Stellar Isochrones with pyLIMASS
The Astronomical JournalWe present pyLIMASS, a novel algorithm for estimating the physical properties of the lensing system in microlensing events. The main idea of pyLIMASS is to combine all available information regarding the microlensing event, defined as observables , and ...
E. Bachelet +2 more
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Candidate Microlensing Brown Dwarfs in Binary Lens Systems from the 2023–2025 Observing Seasons
The Astronomical JournalWe present detailed light-curve analyses of 10 binary-lens microlensing events observed during the 2023–2025 seasons and selected as candidates for hosting brown dwarf companions.
Cheongho Han +68 more
doaj +1 more source
Gravitational Microlensing, the Distance Scale, and the Ages [PDF]
Symposium - International Astronomical Union, 1996 A high optical depth to gravitational microlensing towards the galactic bulge is consistent with current models of the galactic bar. The low optical depth towards the LMC can probably be accounted for by the ordinary stars in our galaxy and in the LMC itself. No conclusive evidence is available yet for the presence or absence of a large number of brown
openaire +3 more sources
Spin Precession Signatures as an Indicator of Microlensing in Strongly Lensed Gravitational Waves
The Astrophysical JournalMicrolensing by the stellar field in a strong-lensing galaxy can introduce wave-optics distortions into the waveforms of strongly lensed gravitational waves (SLGWs).
Xikai Shan +3 more
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Gravitational microlensing—A report on the MACHO project [PDF]
Reviews of Modern Physics, 1999 There is abundant evidence that the mass of the Universe is dominated by dark matter of unknown form. The MACHO project is one of several teams searching for the dark matter around our Galaxy in the form of Massive Compact Halo Objects (MACHOs).
openaire +2 more sources
Two Low Mass-ratio Microlensing Planets and Two Types of Central-resonant Degeneracy
The Astronomical JournalWe present observations and analysis of two low planet/host mass-ratio ( q ) microlensing planets discovered in high-magnification events. KMT-2025-BLG-0811Lb has q ∼ 4.5 × 10 ^−5 , and a Bayesian analysis favors a super-Earth/mini-Neptune orbiting an M-
Yuchen Tang +45 more
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Quasar Microlensing Statistics and Flux-ratio Anomalies in Lens Models
The Astronomical JournalPrecise lens modeling is a critical step in time delay studies of multiply imaged quasars, which are key for measuring some important cosmological parameters (especially H _0 ).
E. Mediavilla +2 more
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