Results 51 to 60 of about 142 (95)

KMT-2018-BLG-0029Lb and OGLE-2019-BLG-0960Lb: Mass Measurements for Two Super-Earth Microlensing Planets

The Astronomical Journal
KMT-2018-BLG-0029Lb and OGLE-2019-BLG-0960Lb were the lowest mass-ratio microlensing planets at the time of discovery. For both events, microlensing parallax measurements from the Spitzer Space Telescope implied lens systems that were more distant and ...
Keming Zhang, Sean K. Terry, Joshua S. Bloom, B. Scott Gaudi, Jessica R. Lu   +4 more
doaj   +1 more source

The BAGLE Python Package for Bayesian Analysis of Gravitational Lensing Events

The Astronomical Journal
We present the open-source Python package, Bayesian Analysis of Gravitational Lensing Events (BAGLE), which enables modeling and joint fitting of photometric and astrometric data sets. We describe the model parameterizations and present the equations for
J. R. Lu, Michael Medford, Casey Y. Lam, T. Dex Bhadra, Macy J. Huston, Natasha S. Abrams, Edward Broadberry, Jeff Chen, Sean K. Terry, Nijaid Arredondo, Andrew Scharf, Raphael A. P. Oliveira   +11 more
doaj   +1 more source

MOA-2015-BLG-337: A Planetary System with a Low-mass Brown Dwarf/Planetary Boundary Host, or a Brown Dwarf Binary [PDF]

, 2018
We report the discovery and the analysis of the short timescale binary-lens microlensing event, MOA-2015-BLG-337. The lens system could be a planetary system with a very low mass host, around the brown dwarf/planetary mass boundary, or a brown dwarf ...
Saito T, Bennett DP, Albrow MD, Muraki Y, Kim H-W, Cha S-M, Ranc C, Sumi T, Ryu Y-H, Lee D-J, Yee JC, Udalski A, Fukui A, Li MC, Yamada T, Szyma'nski MK, Abe F, Shin I-G, Poleski R, Suzuki D, Tristram PJ, Kawasaki K, Pawlak M, Hirao Y, Jung YK, Kim D-J, Itow Y, Lee C-U, Donachie M, Matsubara Y, Kim S-L, Pogge RW, Ohnishi K, Shibai H, Pietrukowicz P, Gould A, Nagakane M, Soszy'nski I, Hwang K-H, Zang W, Koshimoto N, Ling CH, Sullivan DJ, Ulaczyk K, Park B-G, Barry R, Bond IA, Suematsu H, Bhattacharya A, Matsuo T, Chung S-J, Miyazaki S, Sharan A, owski S, Skowron J, Shvartzvald Y, Yonehara A, Zhu W, Lee Y, Han C, Rattenbury N, Mr'oz P   +61 more
core  

Theoretical Advances in Gravitational Microlensing Guided by Artificial Intelligence [PDF]

, 2023
Three decades have passed since the technique of gravitational microlensing was proposed as a means for exoplanet detection, and nearly 200 microlensing exoplanets have been discovered to date.Previously, theoretical studies of the two-body point-mass ...
Zhang, Keming
core  

Mass Production of 2023 KMTNet Microlensing Planets. II. Two Planets and A Brown Dwarf

The Astronomical Journal
To expand the homogeneous microlensing planetary sample of the Korea Microlensing Telescope Network (KMTNet), we investigate six planetary candidates identified by the AnomalyFinder search in the 2023 prime-field data, namely KMT-2023-BLG-1592, OGLE-2023-
Zhixing Li, Hongyu Li, Weicheng Zang, Yoon-Hyun Ryu, Andrzej Udalski, Takahiro Sumi, Hongjing Yang, Yuchen Tang, Jiyuan Zhang, Shude Mao, (Leading Authors), Michael D. Albrow, Sun-Ju Chung, Andrew Gould, Cheongho Han, Kyu- Ha Hwang, Youn Kil Jung, In-Gu Shin, Yossi Shvartzvald, Jennifer C. Yee, Sang-Mok Cha, Dong-Jin Kim, Seung-Lee Kim, Chung-Uk Lee, Dong-Joo Lee, Yongseok Lee, Byeong-Gon Park, Richard W. Pogge, (The KMTNet Collaboration), Przemek Mróz, Michał K. Szymański, Jan Skowron, Radoslaw 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, Ken Bando, David P. Bennett, Aparna Bhattacharya, Ian A. Bond, Akihiko Fukui, Ryusei Hamada, Shunya Hamada, Naoto Hamasak, Yuki Hirao, Stela Ishitani Silva, Naoki Koshimoto, Yutaka Matsubara, Shota Miyazaki, Yasushi Muraki, Tutumi Nagai, Kansuke Nunota, Greg Olmschenk, Clément Ranc, Nicholas J. Rattenbury, Yuki Satoh, Daisuke Suzuki, Sean Terry, Paul J. Tristram, Aikaterini Vandorou, Hibiki Yama, (The MOA Collaboration)   +69 more
doaj   +1 more source

Unveiling MOA-2007-BLG-192: An M Dwarf Hosting a Likely Super-Earth

The Astronomical Journal
We present an analysis of high-angular-resolution images of the microlensing target MOA-2007-BLG-192 using Keck adaptive optics and the Hubble Space Telescope.
Sean K. Terry, Jean-Philippe Beaulieu, David P. Bennett, Euan Hamdorf, Aparna Bhattacharya, Viveka Chaudhry, Andrew A. Cole, Naoki Koshimoto, Jay Anderson, Etienne Bachelet, Joshua W. Blackman, Ian A. Bond, Jessica R. Lu, Jean Baptiste Marquette, Clément Ranc, Natalia E. Rektsini, Kailash Sahu, Aikaterini Vandorou   +17 more
doaj   +1 more source

Limb darkening of a K giant in the galactic bulge: Planet photometry of MACHO 97-BLG-28 [PDF]

, 1999
We present the PLANET photometric data set(10) for the binary-lens microlensing event MACHO 97-BLG-28, consisting of 696 I- and V-band measurements, and analyze it to determine the radial surface brightness profile of the Galactic bulge source star.
Menzies, J, Williams, A, Kane, S, Watson, R, Albrow, MD, Hill, K, Pel, JW, Sahu, MS, Beaulieu, JP, Caldwell, JAR, Martin, R, Pollard, K, Dominik, M, Sackett, PD, Sahu, KC, Vermaak, P, Greenhill, J   +16 more
core   +4 more sources

KMT-2025-BLG-1616Lb: First Microlensing Bound Planet From DREAMS

The Astronomical Journal
We present observations and analysis of the bound planetary microlensing event KMT-2025-BLG-1616. The planetary signal was captured by the Korea Microlensing Telescope Network and the Dark Energy Camera Rogue Earths and Mars Survey (DREAMS).
Hongjing Yang, Weicheng Zang, Yoon-Hyun Ryu, Takahiro Sumi, Jiyuan Zhang, Hongyu Li, Cheongho Han, (Leading Authors), Yuchen Tang, Qiyue Qian, Zhixing Li, Yuxin Shang, Xikai Shan, Shude Mao, Guillermo Damke, Alfredo Zenteno, Steve Heathcote, Konstantina Boutsia, Przemek Mróz, Xiurui Zhao, Matthew Penny, Sean Terry, Patrick Tamburo, Timothy Cunningham, Quanzhi Ye, Eric W. Peng, Rachel Street, Katarzyna Kruszyńska, Etienne Bachelet, Yiannis Tsapras, Markus Hundertmark, (The DREAMS Collaboration), Michael D. Albrow, Sun-Ju Chung, Andrew Gould, Kyu-Ha Hwang, Youn Kil Jung, In-Gu Shin, Yossi Shvartzvald, Jennifer C. Yee, Dong-Jin Kim, Chung-Uk Lee, Byeong-Gon Park, (The KMTNet Collaboration), David P. Bennett, Ian A. Bond, Ryusei Hamada, Yuki Hirao, Asahi Idei, Shuma Makida, Shota Miyazaki, Tutumi Nagai, Togo Nagano, Seiya Nakayama, Mayu Nishio, Kansuke Nunota, Ryo Ogawa, Ryunosuke Oishi, Yui Okumoto, Nicholas J. Rattenbury, Yuki K. Satoh, Daisuke Suzuki, Motohide Tamura, Takuto Tamaoki, Hibiki Yama, (The PRIME Collaboration)   +65 more
doaj   +1 more source

A Differentiable Binary Microlensing Model Using Adaptive Contour Integration Method

The Astronomical Journal
We present microlux , which is a Jax -based code that can compute the binary microlensing light curve and its derivatives both efficiently and accurately.
Haibin Ren, Wei Zhu
doaj   +1 more source

The Brown-dwarf Desert Persists as a Mass-ratio Desert around Low-mass Stars

The Astrophysical Journal Letters
Sun-like stars are known to host a paucity of brown-dwarf companions at close separations. Direct imaging surveys of intermediate-mass stars have suggested that the brown-dwarf desert may be fundamentally a feature in the mass ratio. Microlensing surveys
Keming Zhang
doaj   +1 more source