Results 11 to 20 of about 7,742 (115)

First Resolution of Microlensed Images of a Binary-lens Event

The Astrophysical Journal
We resolve the multiple images of the binary-lens microlensing event ASASSN-22av using the GRAVITY instrument of the Very Large Telescope Interferometer (VLTI).
Zexuan Wu, Subo Dong, A. Mérand, Christopher S. Kochanek, Przemek Mróz, Jinyi Shangguan, Grant Christie, Thiam-Guan Tan, Thomas Bensby, Joss Bland-Hawthorn, Sven Buder, Frank Eisenhauer, Andrew P. Gould, Janez Kos, Tim Natusch, Sanjib Sharma, Andrzej Udalski, J. Woillez, David A. H. Buckley, I. B. Thompson, Karim Abd El Dayem, Anthony Berdeu, Jean-Philippe Berger, Guillaume Bourdarot, Wolfgang Brandner, Richard I. Davies, Denis Defrère, Catherine Dougados, Antonia Drescher, Andreas Eckart, Maximilian Fabricius, Helmut Feuchtgruber, Natascha M. Förster Schreiber, Paulo Garcia, Reinhard Genzel, Stefan Gillessen, Gernot Heißel, Sebastian Hönig, Mathis Houlle, Pierre Kervella, Laura Kreidberg, Sylvestre Lacour, Olivier Lai, Romain Laugier, Jean-Baptiste Le Bouquin, James Leftley, Bruno Lopez, Dieter Lutz, Felix Mang, Florentin Millour, Miguel Montargès, Hugo Nowacki, Mathias Nowak, Thomas Ott, Thibaut Paumard, Karine Perraut, Guy Perrin, Romain Petrov, Pierre-Olivier Petrucci, Nicolas Pourre, Sebastian Rabien, Diogo C. Ribeiro, Sylvie Robbe-Dubois, Matteo Sadun Bordoni, Daryl Santos, Jonas Sauter, Jules Scigliuto, Taro T. Shimizu, Christian Straubmeier, Eckhard Sturm, Matthias Subroweit, Calvin Sykes, Linda Tacconi, Frédéric Vincent, Felix Widmann, the GRAVITY+ collaboration   +75 more
doaj   +2 more sources

Assessing the Impact of Binary Systems on Microlensing Using SPISEA and PopSyCLE Population Simulations

The Astrophysical Journal
Gravitational microlensing provides a unique opportunity to probe the mass distribution of stars, black holes, and other objects in the Milky Way. Population simulations are necessary to interpret results from microlensing surveys.
Natasha S. Abrams, Jessica R. Lu, Casey Y. Lam, Michael S. Medford, Matthew W. Hosek Jr., Sam Rose   +5 more
doaj   +2 more sources

Kepler Rotation Effects on the Binary-Lens Microlensing Events [PDF]

, 1999
We investigate the effects of the Kepler rotation of lens binaries on the binary-microlensing events towards the Large Magellanic Cloud (LMC) and the Small Magellanic Cloud (SMC).
K. Ioka, R Nishi, Y. Kan-ya, K. Ioka, R Nishi, Y. Kan-ya   +5 more
openalex   +3 more sources

Complete Parallax and Proper‐Motion Solutions for Halo Binary‐Lens Microlensing Events [PDF]

, 1999
A major problem in the interpretation of microlensing events is that the only measured quantity, the Einstein timescale tE, is a degenerate combination of the three quantities one would like to know: the mass, distance, and speed of the lens.
Andrew Gould, N. Andronov
openalex   +3 more sources

OGLE-2014-BLG-1112LB: A Microlensing Brown Dwarf Detected through the Channel of a Gravitational Binary-lens Event [PDF]

, 2017
Due to the nature of the gravitational field, microlensing, in principle, provides an important tool for detecting faint and even dark brown dwarfs.
Cheongho Han, A. Udalski, V. Bozza, M. K. Szymański, I. Soszyński, J. Skowron, P. Mróz, R. Poleski, P. Pietrukowicz, S. Kozłowski, K. Ulaczyk, Ł. Wyrzykowski, S. Calchi Novati, G. D’Ago, M. Dominik, M. Hundertmark, U. G. Jørgensen, G. Scarpetta   +17 more
openalex   +3 more sources

Three binary-source binary-lens microlensing events from the 2024 microlensing campaign [PDF]

Publications of the Astronomical Society of the Pacific
We investigated microlensing events detected by the Optical Gravitational Lensing Experiment (OGLE) and Korea Microlensing Telescope Network surveys during the 2024 observing season, focusing on those that exhibit very complex anomaly features.
Cheongho Han, Chung‐Uk Lee, A. Udalski, Michael D. Albrow, Sun‐Ju Chung, Andrew Gould, Youn Kil Jung, Kyu‐Ha Hwang, Yoon-Hyun Ryu, Yossi Shvartzvald, In-Gu Shin, Jennifer C. Yee, Weicheng Zang, Hongjing Yang, Doeon Kim, Dong-Jin Kim, Byeong-Gon Park, P. Mróz, M. K. Szymański, J. Skowron, R. Poleski, I. Soszyński, P. Pietrukowicz, S. Kozłowski, Krzysztof A. Rybicki, Patryk Iwanek, K. Ulaczyk, Marcin Wrona, M. Gromadzki, Mateusz J. Mróz   +29 more
semanticscholar   +3 more sources

A Bayesian algorithm for model selection applied to caustic-crossing binary-lens microlensing events [PDF]

, 2012
We present a full Bayesian algorithm designed to perform automated searches of the parameter space of caustic-crossing binary-lens microlensing events.
N. Kains, P Browne, Keith Horne, M Hundertmark, A. Cassan   +4 more
openalex   +3 more sources

USING ORBITAL EFFECTS TO BREAK THE CLOSE/WIDE DEGENERACY IN BINARY-LENS MICROLENSING EVENTS [PDF]

, 2013
Microlensing can provide an important tool to study binaries, especially those composed of faint or dark objects. However, accurate analysis of binary-lens light curves is often hampered by the well-known degeneracy between close (s < 1) and wide (s > 1)
I.G. Shin, T. Sumi, A. Udalski, J.Y. Choi, C. Han, A. Gould, F. Abe, D. P. Bennett, I A Bond, C. S. Botzler, P Chote, M. Freeman, A Fukui, K. Furusawa, P. Harris, Y. Itow, C.H. Ling, K MASUDA, Y. Matsubara, N. Miyake, Y. Muraki, K. Ohnishi, N. Rattenbury, To. Saito, D. J. Sullivan, D. Suzuki, W. L. Sweatman, P. J. Tristram, K Wada, P. C. M. Yock, The Moa Collaboration, Michał K. Szymański, M. Kubiak, I. Soszynski, G. Pietrzynski, R. Poleski, K Ulaczyk, Paweł Pietrukowicz, S. Kozłowski, J Skowron, Ł. Wyrzykowski, The Ogle Collaboration, I.G. Shin, T. Sumi, A. Udalski, J.Y. Choi, C. Han, A. Gould, F. Abe, D. P. Bennett, I A Bond, C. S. Botzler, P Chote, M. Freeman, A Fukui, K. Furusawa, P. Harris, Y. Itow, C.H. Ling, K MASUDA, Y. Matsubara, N. Miyake, Y. Muraki, K. Ohnishi, N. Rattenbury, To. Saito, D. J. Sullivan, D. Suzuki, W. L. Sweatman, P. J. Tristram, K Wada, P. C. M. Yock, Michał K. Szymański, M. Kubiak, I. Soszynski, G. Pietrzynski, R. Poleski, K Ulaczyk, Paweł Pietrukowicz, S. Kozłowski, J Skowron, Ł. Wyrzykowski   +81 more
openalex   +3 more sources

Distribution of caustic-crossing intervals for Galactic binary-lens microlensing events [PDF]

, 2000
Detection of caustic crossings of binary-lens gravitational microlensing events is important because by detecting them one can obtain useful information about both the lens and the source star.
Cheongho Han, S.-H. Park, Y.-S. Lee
openalex   +3 more sources

TWO STARS TWO WAYS: CONFIRMING A MICROLENSING BINARY LENS SOLUTION WITH A SPECTROSCOPIC MEASUREMENT OF THE ORBIT [PDF]

, 2016
Light curves of microlensing events involving stellar binaries and planetary systems can provide information about the orbital elements of the system due to orbital modulations of the caustic structure.
Jennifer C. Yee, John Asher Johnson, J. Skowron, Andrew Gould, J. Sebastian Pineda, Jason D. Eastman, Andrew Vanderburg, Andrew W. Howard   +7 more
openalex   +3 more sources