Results 61 to 70 of about 3,356 (111)

Periodic Signals in Binary Microlensing Events

, 2015
Gravitational microlensing events are powerful tools for the study of stellar populations. In particular, they can be used to discover and study a variety of binary systems.
Di Stefano, Rosanne, Esin, Ann, Guo, Xinyi, Taylor, Jeffrey   +3 more
core   +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

Astrometric microlensing

, 2017
Astrometric microlensing will offer in the next future a new channel for investigating the nature of both lenses and sources involved in a gravitational microlensing event.
De Paolis, F., Giordano, M., Ingrosso, G., Manni, L., Nucita, A. A.   +4 more
core   +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

Photometric Confirmation of MACHO Large Magellanic Cloud Microlensing Events

, 2005
We present previously unpublished photometry of three Large Magellanic Cloud (LMC) microlensing events and show that the new photometry confirms the microlensing interpretation of these events.
Andrew C. Becker, Ansari R., Austin Tomaney, Beaulieu J. P., Cook K., David P. Bennett, della Valle M., Lasserre T., Udalski A., Udalski A., Woniak P. R.   +10 more
core   +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

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 Characteristic Planetary Feature in Double-Peaked, High-Magnification Microlensing Events

, 2008
A significant fraction of microlensing planets have been discovered in high-magnification events, and a significant fraction of these events exhibit a double-peak structure at their peak.
B. Scott Gaudi, Bozza V., Chang K., Cheongho Han, Dominik M., Witt H. J.   +5 more
core   +1 more source

A Search for Stellar-Mass Black Holes via Astrometric Microlensing

, 2016
While dozens of stellar mass black holes have been discovered in binary systems, isolated black holes have eluded detection. Their presence can be inferred when they lens light from a background star.
Kozlowski, S., Lu, J. R., Ofek, E. O., Sinukoff, E., Udalski, A.   +4 more
core   +1 more source