Results 61 to 70 of about 3,383 (120)

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We present previously unpublished photometry of three Large Magellanic Cloud (LMC) microlensing events and show that the new photometry confirms the microlensing interpretation of these events.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

Constraining the masses of microlensing black holes and the mass gap with Gaia DR2

, 2020
Context: Gravitational microlensing is sensitive to compact-object lenses in the Milky Way, including white dwarfs, neutron stars or black holes, and could potentially probe a wide range of stellar remnant masses.
Mandel, Ilya, Wyrzykowski, Łukasz
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

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

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

A Terrestrial Planet in a ~1 AU Orbit Around One Member of a ~15 AU Binary

, 2014
We detect a cold, terrestrial planet in a binary-star system using gravitational microlensing. The planet has low mass (2 Earth masses) and lies projected at $a_{\perp,ph}$ ~ 0.8 astronomical units (AU) from its host star, similar to the Earth-Sun ...
Abe, F., Albrow, M., Bennett, D. P., Bond, I. A., Botzler, C. S., Choi, J. -Y., Christie, G. W., DePoy, D. L., Drummond, J., Freeman, M., Friedmann, M., Fukui, A., Fukunaga, D., Gaudi, B. S., Gould, A., Han, C., Hwang, K. -H., Itow, Y., Jung, Y. K., Kaspi, S., Koshimoto, N., Kozłowski, S., Kubiak, M., Larsen, P., Lee, C. -U., Ling, C. H., Maoz, D., Masuda, K., Matsubara, Y., McCormick, J., Mróz, P., Muraki, Y., Namba, S., Natusch, T., Ngan, H., Ohnishi, K., Park, H., Philpott, L., Pietrukowicz, P., Pietrzyński, G., Pogge, R. W., Poleski, R., Porritt, I., Rattenbury, N. J., Saito, To., Shin, I. -G., Shvartzvald, Y., Skowron, J., Soszyński, I., Sullivan, D. J., Sumi, T., Suzuki, D., Szymański, M. K., Tan, T. -G., Tristram, P. J., Tsurumi, N., Udalski, A., Ulaczyk, K., Wada, K., Wyrzykowski, Ł., Yamai, N., Yee, J. C., Yock, P. C. M., Yonehara, A.   +63 more
core   +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

Microlensing Detections of Planets in Binary Stellar Systems

, 2007
We demonstrate that microlensing can be used for detecting planets in binary stellar systems. This is possible because in the geometry of planetary binary systems where the planet orbits one of the binary component and the other binary star is located at
Bozza V., Byeong‐Gon Park, Chang K., Cheongho Han, Chung‐Uk Lee, Dominik M., Dong‐Wook Lee, Duquennoy A., Eggenberger A., Ho‐Il Kim, Kayser R., Schneider P., Sun‐Ju Chung, Witt H. J., Young‐Soo Kim   +14 more
core   +1 more source