Results 41 to 50 of about 168,724 (208)
Gravitational microlensing of fractal sources [PDF]
Monthly Notices of the Royal Astronomical Society, 2004 Gravitational microlensing has proven to be a powerful tool in the study of quasars, providing some of the strongest limits on the scales of structure in the central engine. Typically sources are considered to be smoothly varying on some particular scale; such simple sources result in recognisable time scales in microlensing light curves from which the
openaire +2 more sources
The new frontiers of gravitational microlensing [PDF]
, 2022 Albert Einstein referred to gravitational microlensing as a “most curious effect”, and while its underlying principles are intriguingly simple, their universality makes a powerful tool for inferring information about a wide range of astronomical bodies ...
Dominik, M.
core +1 more source
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 ...
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Real-Time Detection Of Gravitational Microlensing [PDF]
Symposium - International Astronomical Union, 1996 Real-time detection of microlensing has moved from proof of concept in 1994 (Udalski et al. 1994a, Alcock et al. 1994) to a steady stream of events this year. Global dissemination of these events by the MACHO and OGLE collaborations has made possible intensive photometric and spectroscopic follow up from widely dispersed sites confirming the ...
Pratt, M. R. +19 more
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OGLE-2019-BLG-1180Lb: Discovery of a Wide-orbit Jupiter-mass Planet around a Late-type Star
The Astronomical Journal, 2023 We report on the discovery and analysis of the planetary microlensing event OGLE-2019-BLG-1180 with a planet-to-star mass ratio q ∼ 0.003. The event OGLE-2019-BLG-1180 has unambiguous cusp-passing and caustic-crossing anomalies, which were caused by a ...
Sun-Ju Chung +35 more
doaj +1 more source
GRAVITATIONAL MICROLENSING BY THE ELLIS WORMHOLE [PDF]
The Astrophysical Journal, 2010 27 pages, 4 figures, ApJ ...
openaire +2 more sources
Advances in High Energy Physics, Volume 2018, Issue 1, 2018., 2018 Nonsingular Ayon‐Beato‐Garcia (ABG) spherically symmetric static black hole (BH) with charge to mass ratio q = g/2m is metric solution of Born Infeld nonlinear Maxwell‐Einstein theory. Central region of the BH behaves as (anti‐)de Sitter for (|q | > 1) | q | < 1.
H. Ghaffarnejad +3 more
wiley +1 more source
Gravitational microlensing as a test of stellar model atmospheres [PDF]
, 2002 We present calculations illustrating the potential of gravitational microlensing to discriminate between classical models of stellar surface brightness profiles and the computed ""Next Generation"" models of Hauschildt et al. (1999).
Bryce, H.M. +7 more
core +1 more source
Bose‐Einstein Condensate Dark Matter Halos Confronted with Galactic Rotation Curves
Advances in High Energy Physics, Volume 2017, Issue 1, 2017., 2017 We present a comparative confrontation of both the Bose‐Einstein Condensate (BEC) and the Navarro‐Frenk‐White (NFW) dark halo models with galactic rotation curves. We employ 6 High Surface Brightness (HSB), 6 Low Surface Brightness (LSB), and 7 dwarf galaxies with rotation curves falling into two classes.
M. Dwornik +4 more
wiley +1 more source
Advances in Astronomy, Volume 2015, Issue 1, 2015., 2015 In recent years free‐floating planets (FFPs) have drawn a great interest among astrophysicists. Gravitational microlensing is a unique and exclusive method for their investigation which may allow obtaining precious information about their mass and spatial distribution.
Lindita Hamolli +4 more
wiley +1 more source