Results 61 to 70 of about 15,221 (204)
Ongoing astrometric microlensing events from VVV and Gaia [PDF]
, 2019 6 pages, 2 figures, accepted MNRAS LettersWe extend predictive microlensing event searches using the Vista Variables in the Via Lactea survey and the second Gaia data release.
Belokurov, Vasily +4 more
core +3 more sources
Spin‐Orbit Photonics with Potato Starch Lenses
Advanced Optical Materials, Volume 13, Issue 21, July 25, 2025.Native potato starch spherulites are introduced as volumetric optical elements that modulate both dynamic and geometric phases of light. These spherulites focus light and generate optical vortices via spin‐orbit interaction, functioning as polarization‐sensitive microlenses. Their unique radial anisotropy enables applications in vortex beam generation,
Petr Bouchal +4 more
wiley +1 more source
Quasar Microlensing Statistics and Flux-ratio Anomalies in Lens Models
The Astronomical JournalPrecise lens modeling is a critical step in time delay studies of multiply imaged quasars, which are key for measuring some important cosmological parameters (especially H _0 ).
E. Mediavilla +2 more
doaj +1 more source
Primordial Black Hole Dark Matter Simulations Using PopSyCLE
The Astrophysical JournalPrimordial black holes (PBHs), theorized to have originated in the early Universe, are speculated to be a viable form of dark matter. If they exist, they should be detectable through photometric and astrometric signals resulting from gravitational ...
Kerianne Pruett +8 more
doaj +1 more source
Proceedings of the International Astronomical Union, 2012 AbstractWe propose to determine the mass of isolated neutron stars through gravitational microlensing. We show that the all-sky microlensing pulsar event rate is ~2.8 × 10−10 per year per background source (/yr/source). Microlensing neutron star event rate would contribute ~20% to the total Galactic event rate at time-scale of ~15 days. We also present
Shi Dai, Renxin Xu
openaire +1 more source
Investigating the free-floating planet mass by Euclid observations
, 2016 The detection of anomalies in gravitational microlensing events is nowadays one of the main goals among the microlensing community. In the case of single-lens events, these anomalies can be caused by the finite source effects, that is when the source ...
De Paolis, Francesco +3 more
core +1 more source
Inverse design of color routers in CMOS image sensors: toward minimizing interpixel crosstalk
Nanophotonics, Volume 13, Issue 20, Page 3895-3914, August 2024.Abstract Over the past decade, significant advancements in high‐resolution imaging technology have been driven by the miniaturization of pixels within image sensors. However, this reduction in pixel size to submicrometer dimensions has led to decreased efficiency in color filters and microlens arrays.
Sangbin Lee +7 more
wiley +1 more source
Galactic microlensing by acoustic Schwarzschild black holes
European Physical Journal C: Particles and FieldsThis work explores the application of acoustic black holes as a novel class of lenses in Galactic microlensing, potentially representing dark matter halo objects.
Gulnaz F. Akhtaryanova +3 more
doaj +1 more source
Measuring Microlensing using Spectra of Multiply Lensed Quasars
, 2012 We report on a program of spectroscopic observations of gravitationally-lensed QSOs with multiple images. We seek to establish whether microlensing is occurring in each QSO image using only single-epoch observations.
Abajas +67 more
core +1 more source
Die Suche nach kalten, fremden Welten
Physik in unserer Zeit, Volume 55, Issue 3, Page 140-147, May 2024.Die meisten der heute bekannten extrasolaren Planeten umkreisen ihren Mutterstern auf engen Umlaufbahnen in weniger als 100 Tagen. Gesteinsplaneten mit größeren Bahnradien sind von herausragender Bedeutung für Theorien der Planetenentstehung. Die Mikrogravitationslinsenmethode bietet eine hervorragende Möglichkeit, solche Planeten zu finden – und das ...
Markus Hundertmark, Yiannis Tsapras
wiley +1 more source