Results 91 to 100 of about 15,221 (204)

Observations of Microlensed Images with Dual-field Interferometry: On-sky Demonstration and Prospects

The Astrophysical Journal
Interferometric observations of gravitational microlensing events offer an opportunity for precise, efficient, and direct mass and distance measurements of lensing objects, especially those of isolated neutron stars and black holes.
Przemek Mróz, Subo Dong, Antoine Mérand, Jinyi Shangguan, Julien Woillez, Andrew Gould, Andrzej Udalski, Frank Eisenhauer, Yoon-Hyun Ryu, Zexuan Wu, Zhuokai Liu, Hongjing Yang, —, Guillaume Bourdarot, Denis Defrère, Antonia Drescher, Maximilian Fabricius, Paulo Garcia, Reinhard Genzel, Stefan Gillessen, Sebastian F. Hönig, Laura Kreidberg, Jean-Baptiste Le Bouquin, Dieter Lutz, Florentin Millour, Thomas Ott, Thibaut Paumard, Jonas Sauter, T. Taro Shimizu, Christian Straubmeier, Matthias Subroweit, Felix Widmann, (The GRAVITY+ Collaboration), Michał K. Szymański, Igor Soszyński, Paweł Pietrukowicz, Szymon Kozłowski, Radosław Poleski, Jan Skowron, Krzysztof Ulaczyk, Mariusz Gromadzki, Krzysztof Rybicki, Patryk Iwanek, Marcin Wrona, Mateusz J. Mróz, (The OGLE Collaboration), Michael D. Albrow, Sun-Ju Chung, Cheongho Han, Kyu-Ha Hwang, Youn Kil Jung, In-Gu Shin, Yossi Shvartzvald, Jennifer C. Yee, Weicheng Zang, Sang-Mok Cha, Dong-Jin Kim, Seung-Lee Kim, Chung-Uk Lee, Dong-Joo Lee, Yongseok Lee, Byeong-Gon Park, Richard W. Pogge, (KMTNet Collaboration)   +63 more
doaj   +1 more source

Residual Test to Search for Microlensing Signatures in Strongly Lensed Gravitational Wave Signals

The Astrophysical Journal
When 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, Xikai Shan, Justin Janquart, Otto Hannuksela, Martin Hendry, Bin Hu   +5 more
doaj   +1 more source

Astrometric microlensing probes of the isolated neutron star population with Roman

Astronomy & Astrophysics
Context. Notoriously hard to detect and study, isolated neutron stars (NSs) might provide valuable answers to fundamental questions about stellar evolution and explosion physics.
Kaczmarek Z., Halasi-Kun A., McGill P., Perkins S. E., Dawson W. A.   +4 more
doaj   +1 more source

Modeling Binary Lenses and Sources with the BAGLE Python Package

The Astrophysical Journal
Gravitational microlensing is a powerful tool that can be used to find and measure the mass of isolated and dark compact objects. In many microlensing events, the lens, the source, or both may be binary systems.
T. Dex Bhadra, J. R. Lu, Natasha S. Abrams, Andrew Scharf, Edward Broadberry, Casey Lam, Macy J. Huston   +6 more
doaj   +1 more source

LensNet: Enhancing Real-time Microlensing Event Discovery with Recurrent Neural Networks in the Korea Microlensing Telescope Network

The Astronomical Journal
Traditional microlensing event vetting methods require highly trained human experts, and the process is both complex and time consuming. This reliance on manual inspection often leads to inefficiencies and constrains the ability to scale for widespread ...
Javier Viaña, Kyu-Ha Hwang, Zoë de Beurs, Jennifer C. Yee, Andrew Vanderburg, Michael D. Albrow, Sun-Ju Chung, Andrew Gould, Cheongho Han, Youn Kil Jung, Yoon-Hyun Ryu, In-Gu Shin, Yossi Shvartzvald, Hongjing Yang, Weicheng Zang, Sang-Mok Cha, Dong-Jin Kim, Seung-Lee Kim, Chung-Uk Lee, Dong-Joo Lee, Yongseok Lee, Byeong-Gon Park, Richard W. Pogge   +22 more
doaj   +1 more source

Binary-lens Microlensing Degeneracy: Impact on Planetary Sensitivity and Mass-ratio Function

The Astronomical Journal
Gravitational 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, Hongjing Yang, Jiyuan Zhang, Shude Mao, Andrew Gould, Weicheng Zang, Qiyue Qian, Jennifer C. Yee   +7 more
doaj   +1 more source

The ET mission to search for earth 2.0s. [PDF]

Innovation (Camb), 2022
Ge J, Zhang H, Deng H, Howell SB, ET team.   +4 more
europepmc   +1 more source

Microlensing Discovery and Characterization Efficiency in the Vera C. Rubin Legacy Survey of Space and Time

The Astrophysical Journal Supplement Series
The Vera C. Rubin Legacy Survey of Space and Time will discover thousands of microlensing events across the Milky Way, allowing for the study of populations of exoplanets, stars, and compact objects.
Natasha S. Abrams, Markus P. G. Hundertmark, Somayeh Khakpash, Rachel A. Street, R. Lynne Jones, Jessica R. Lu, Etienne Bachelet, Yiannis Tsapras, Marc Moniez, Tristan Blaineau, Rosanne Di Stefano, Martin Makler, Anibal Varela, Markus Rabus   +13 more
doaj   +1 more source

Entropy of the Universe and Hierarchical Dark Matter. [PDF]

Entropy (Basel), 2022
Frampton PH.
europepmc   +1 more source

Demagnifying Gravitational Lenses as Probes of Dark Matter Structures and Nonminimal Couplings to Gravity

The Astrophysical Journal Letters
Magnification of total image fluxes is typically considered a defining feature of gravitational microlensing. In contrast, I will show that nonminimal couplings to gravity can generate regions of negative gravitational potential curvature, giving rise to
Hong-Yi Zhang
doaj   +1 more source