Results 91 to 100 of about 5,260 (217)

Gravitational Microlensing [PDF]

, 2017
A gravitational microlensing event occurs when a foreground star passes near our line of site to a background source star. The foreground star acts as a lens, perturbing the image of the source star and amplifying the apparent intensity. Because the lens
Barnes, Wesley M
core   +1 more source

How Rare Are TESS Free-floating Planets?

The Astrophysical Journal Letters
Recently, Kunimoto et al. claimed that a short-lived signal in the Transiting Exoplanet Survey Satellite (TESS) Sector 61 database was possibly caused by a microlensing event with a terrestrial-mass free-floating planet (FFP) lens.
Hongjing Yang, Weicheng Zang, Tianjun Gan, Renkun Kuang, Andrew Gould, Shude Mao   +5 more
doaj   +1 more source

The WFIRST Exoplanet Microlensing Survey

, 2018
The Wide Field Infrared Survey Telescope (WFIRST) is a NASA space observatory designed to address key questions about the Universe and the population of extrasolar planets in our Galaxy. WFIRST is planned for launch in the mid-2020s.
Calchi Novati, Sebastiano (5481029), Calchi Novati, Sebastiano   +1 more
core   +2 more sources

Data intensive quasar microlensing

, 2015
Quasar microlensing occurs when a distant quasar's light passes through a foreground galaxy on its way to Earth, providing a unique probe of the quasar's central supermassive black hole.
Georgios Vernardos (19106318)
core   +1 more source

Historic microlensing events in the Euclid Galactic Bulge Survey

Astronomy & Astrophysics
Context. Microlensing campaigns have a long history of observations covering the Galactic bulge, whereby thousands of detections have been obtained, including many exoplanetary systems.
Bozza V., Salmeri L., Rota P., Bachelet E., Beaulieu J.-P., Cole A. A., Cuillandre J. C., Kerins E., McDonald I., Mróz P., Penny M., Ranc C., Rektsini N., Thygesen E., Verma H., Udalski A., Poleski R., Skowron J., Szymański M. K., Soszyński I., Pietrukowicz P., Kozłowski S., Ulaczyk K., Rybicki K. A., Iwanek P., Wrona M., Gromadzki M., Mróz M. J., Abe F., Bennett D. P., Bhattacharya A., Bond I. A., Hamada R., Hirao Y., Idei A., Ishitani Silva S., Miyazaki S., Muraki Y., Nagai T., Nunota K., Olmschenk G., Rattenbury N. J., Satoh Y. K., Sumi T., Suzuki D., Tamaoki T., Terry S. K., Tristram P. J., Vandorou A., Yama H.   +49 more
doaj   +1 more source

Spin Precession Signatures as an Indicator of Microlensing in Strongly Lensed Gravitational Waves

The Astrophysical Journal
Microlensing by the stellar field in a strong-lensing galaxy can introduce wave-optics distortions into the waveforms of strongly lensed gravitational waves (SLGWs).
Xikai Shan, Huan Yang, Shude Mao, Otto A. Hannuksela   +3 more
doaj   +1 more source

Gamma-Ray Variability Induced by Microlensing on Intermediate Size Structures in Lensed Blazars

Galaxies, 2016
Changes of the magnification ratio of images in a lensed blazar, caused by microlensing on individual stars, have been proposed as a probe of the size and velocity of the emission region in the lensed source.
Julian Sitarek, Włodek Bednarek
doaj   +1 more source

A visual guide to planetary microlensing [PDF]

, 2010
The microlensing technique has found 10 exoplanets to date and promises to discover more in the near future. While planetary transit light curves all show a familiar shape, planetary perturbations to microlensing light curves can manifest a wide variety ...
Paul L. Schechter, Leslie A. Rogers
core   +1 more source

Single-epoch and Differential Astrometric Microlensing of Quasars

The Astrophysical Journal
We propose and discuss a new experimental approach to measure the centroid shift induced by gravitational microlensing in the images of lensed quasars (astrometric microlensing).
R. Forés-Toribio, E. Mediavilla, J. A. Muñoz, J. Jiménez-Vicente, C. Fian, C. del Burgo   +5 more
doaj   +1 more source

Parallax Effect in Microlensing Events Due to Free-floating Planets

The Astronomical Journal
One of the most important applications of microlensing observations is the detection of free-floating planets (FFPs). The timescale of microlensing due to FFPs ( t _E ) is short (a few days). Discerning the annual parallax effect in observations of these
Parisa Sangtarash, Sedighe Sajadian
doaj   +1 more source