Results 61 to 70 of about 142 (95)

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

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

Gravitational microlensing and the search for extrasolar planets [PDF]

, 2013
Includes bibliographical references.This project is aimed at tackling binary gravitational microlensing events. Since the early conception of gravitational lensing before Einstein’s General Theory of Relativity, physicists and astronomers of the early ...
Mengistie, Getachew Mekonnen
core  

On the Reparameterization between Cartesian Position–Velocity Vectors and Orbital Elements in the Kepler Problem

The Astrophysical Journal
Reparameterization from the standard set of orbital elements to Cartesian position–velocity vectors can be computationally advantageous for orbit inference problems, particularly when orbital elements are weakly constrained.
Kento Masuda, Kansuke Nunota
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

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

Subaru Telescope -History, active/adaptive optics, instruments, and scientific achievements. [PDF]

Proc Jpn Acad Ser B Phys Biol Sci, 2021
Iye M.
europepmc   +1 more source

Recent advances in infrared imagers: toward thermodynamic and quantum limits of photon sensitivity. [PDF]

Rep Prog Phys, 2020
Bianconi S, Mohseni H.
europepmc   +1 more source

Primordial black holes and the origin of the matter-antimatter asymmetry. [PDF]

Philos Trans A Math Phys Eng Sci, 2019
García-Bellido J.
europepmc   +1 more source

Direct test of the FLRW metric from strongly lensed gravitational wave observations. [PDF]

Sci Rep, 2019
Cao S, Qi J, Cao Z, Biesiada M, Li J, Pan Y, Zhu ZH.   +6 more
europepmc   +1 more source