Results 61 to 70 of about 135 (115)

Four Cold Giant Planets Discovered by High-cadence Microlensing Surveys

The Astronomical Journal
We report the discovery of four cold giant planets identified through the analysis of microlensing events detected by high-cadence surveys: OGLE-2016-BLG-0261, KMT-2025-BLG-0026, KMT-2025-BLG-0030, and KMT-2025-BLG-2272.
Cheongho Han, Chung-Uk Lee, Andrzej Udalski, Ian A. Bond, (Leading authors), 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, Seung-Lee Kim, Dong-Joo Lee, Sang-Mok Cha, Yongseok Lee, Byeong-Gon Park, Richard W. Pogge, (KMTNet Collaboration), Przemek Mróz, Michał K. Szymański, Jan Skowron, Radosław Poleski, Igor Soszyński, Paweł Pietrukowicz, Szymon Kozłowski, Krzysztof A. Rybicki, Patryk Iwanek, Krzysztof Ulaczyk, Marcin Wrona, Mariusz Gromadzki, Mateusz J. Mróz, (The OGLE Collaboration), David P. Bennett, Chihiro Ueda, Ryusei Hamada, Yuki Hirao, Shuma Makida, Shota Miyazaki, Tutumi Nagai, Seiya Nakayama, Kansuke Nunota, Ryo Ogawa, Ryunosuke Oishi, Hideaki Ose, Nicholas J. Rattenbury, Yuki K. Satoh, Takahiro Sumi, Daisuke Suzuki, Motohide Tamura, Takuto Tamaoki, Hibiki Yama, (The PRIME Collaboration)   +58 more
doaj   +1 more source

Search for Sub-Solar Mass Binaries with Einstein Telescope and Cosmic Explorer. [PDF]

Entropy (Basel), 2022
Nunes RC.
europepmc   +1 more source

OGLE-2014-BLG-0221Lb: A Jupiter Mass Ratio Companion Orbiting Either a Late-type Star or a Stellar Remnant

The Astronomical Journal
We present the analysis of the microlensing event OGLE-2014-BLG-0221, a planetary candidate event discovered in 2014. The photometric light curve is best described by a binary-lens single-source model. Our light-curve modeling finds two degenerate models,
Rintaro Kirikawa, Takahiro Sumi, David P. Bennett, Daisuke Suzuki, Naoki Koshimoto, Shota Miyazaki, Ian A. Bond, Andrzej Udalski, Nicholas J. Rattenbury, Leading Authors, Fumio Abe, Richard Barry, Aparna Bhattacharya, Hirosane Fujii, Akihiko Fukui, Ryusei Hamada, Yuki Hirao, Stela Ishitani Silva, Yoshitaka Itow, Yutaka Matsubara, Yasushi Muraki, Greg Olmschenk, Clément Ranc, Yuki K. Satoh, Mio Tomoyoshi, Paul . J. Tristram, Aikaterini Vandorou, Hibiki Yama, Kansuke Yamashita, MOA COLLABORATION, Przemek Mróz, Radosław Poleski, Jan Skowron, Michał K. Szymański, Igor Soszyński, Paweł Pietrukowicz, Szymon Kozłowski, Krzysztof Ulaczyk, Mateusz J. Mróz, OGLE COLLABORATION   +39 more
doaj   +1 more source

OGLE-2011-BLG-0462: An Isolated Stellar-mass Black Hole Confirmed Using New HST Astrometry and Updated Photometry

The Astrophysical Journal
The long-duration Galactic-bulge microlensing event OGLE-2011-BLG-0462 produced relativistic astrometric deflections of the source star, which we measured using Hubble Space Telescope (HST) observations taken at eight epochs over ∼6 yr.
Kailash C. Sahu, Jay Anderson, Stefano Casertano, Howard E. Bond, Martin Dominik, Annalisa Calamida, Andrea Bellini, Thomas M. Brown, Henry C. Ferguson, Marina Rejkuba   +9 more
doaj   +1 more source

Candidate Microlensing Brown Dwarfs in Binary Lens Systems from the 2023–2025 Observing Seasons

The Astronomical Journal
We 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, Andrzej Udalski, Ian A. Bond, Chung-Uk Lee, (Leading authors), 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, Seung-Lee Kim, Dong-Joo Lee, Sang-Mok Cha, Yongseok Lee, Byeong-Gon Park, Richard W. Pogge, (KMTNet Collaboration), Przemek Mróz, Michał K. Szymański, Jan Skowron, Radosław Poleski, Igor Soszyński, Paweł Pietrukowicz, Szymon Kozłowski, Krzysztof A. Rybicki, Patryk Iwanek, Krzysztof Ulaczyk, Marcin Wrona, Mariusz Gromadzki, Mateusz J. Mróz, (The OGLE Collaboration), Fumio Abe, David P. Bennett, Aparna Bhattacharya, Ryusei Hamada, Yuki Hirao, Asahi Idei, Stela Ishitani Silva, Shuma Makida, Shota Miyazaki, Yasushi Muraki, Tutumi Nagai, Togo Nagano, Seiya Nakayama, Mayu Nishio, Kansuke Nunota, Ryo Ogawa, Ryunosuke Oishi, Yui Okumoto, Greg Olmschenk, Clément Ranc, Nicholas J. Rattenbury, Yuki Satoh, Takahiro Sumi, Daisuke Suzuki, Takuto Tamaoki, Sean K. Terry, Paul J. Tristram, Aikaterini Vandorou, Hibiki Yama, (The MOA/PRIME Collaboration)   +68 more
doaj   +1 more source

The First Model-independent Upper Bound on Microlensing Signature of the Highest-mass Binary Black Hole Event GW231123

The Astrophysical Journal
The 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
doaj   +1 more source

Simulations of the gravitational microlensing: Extended source models and impact of binary stars [PDF]

Journal of Physical Studies, 2012
V. M. Sliusar, V. I. Zhdanov, A. N. Alexandrov   +2 more
openaire   +1 more source

Fast Radio Bursts by Stellar Wind Microlensing of a Faint Background Source

The Astrophysical Journal
By assuming the inverse square law of solar wind plasma density as representative of other stars, it is shown that just outside a star, the outward deflection of a passing radio signal at ν  ≈ 1 GHz (which is capable of penetrating the plasma) is about 5
Richard Lieu
doaj   +1 more source

A Unified Analytic Framework for Microlensing Caustics: Geode Solutions and Hyper-Catalan Signatures

The Astrophysical Journal
We give a preparation-invariant analytic description of image formation near microlensing caustics. After a local Weierstrass preparation at any multiple image (order d ≥ 2), the lens mapping reduces to a single geode variable m satisfying m  =  U φ ( m )
Gleb Berloff, Natalia G. Berloff
doaj   +1 more source

A topic review on probing primordial black hole dark matter with scalar induced gravitational waves. [PDF]

iScience, 2021
Yuan C, Huang QG.
europepmc   +1 more source