Results 21 to 30 of about 15,221 (204)

Identifying interesting planetary systems for future X‐ray observations

open access: yesAstronomische Nachrichten, Volume 343, Issue 4, May 2022., 2022
Abstract X‐ray observations of star–planet systems are important to grow our understanding of exoplanets; these observations allow for studies of photoevaporation of the exoplanetary atmosphere, and in some cases even estimations of the size of the outer planetary atmosphere.
Grace Foster, Katja Poppenhaeger
wiley   +1 more source

Tunable microfluidic microlenses [PDF]

open access: yesApplied Optics, 2005
A novel type of liquid microlens, bounded by a microfabricated, distensible membrane and activated by a microfluidic liquid-handling system, is presented. By use of an elastomer membrane fabricated by spin coating onto a dry-etched silicon substrate, the liquid-filled cavity acts as a lens whereby applied pressure changes the membrane distension and ...
Werber, Armin, Zappe, Hans
openaire   +3 more sources

Effervescence‐Inspired Self‐Healing Plastrons for Long‐Term Immersion Stability

open access: yesAdvanced Functional Materials, Volume 32, Issue 4, January 19, 2022., 2022
Underwater performance of superhydrophobic/superamphiphobic surfaces relies on the robustness and durability of the gas‐layer (plastron). A simple and scalable technique of effervescence‐inspired on‐demand plastron repair is presented. Surfaces do not suffer from any performance‐losses even after 2 months of continuous immersion.
William S. Y. Wong, Doris Vollmer
wiley   +1 more source

Microlensing and Its Degeneracy Breakers: Parallax, Finite Source, High-Resolution Imaging, and Astrometry

open access: yesUniverse, 2017
First proposed by Paczynski in 1986, microlensing has been instrumental in the search for compact dark matter as well as discovery and characterization of exoplanets.
Chien-Hsiu Lee
doaj   +1 more source

Cooperative microlenses

open access: yesOptics Express, 2004
We demonstrate that microspheres above a substrate act as microscopic lenses. Their Brownian motion causes the focal point to change abruptly, thereby creating characteristic intensity fluctuations which depend on the interaction between the spheres. To this end, superparamagnetic spheres in a magnetic field assemble into long pearl chains, where the ...
L, Helseth, T, Fischer
openaire   +2 more sources

Measurement of Source Star Colors with the K2C9-CFHT Multi-color Microlensing Survey [PDF]

open access: yes, 2018
K2 Campaign 9 (K2C9) was the first space-based microlensing parallax survey capable of measuring microlensing parallaxes of free-floating planet candidate microlensing events.
Barentsen, Geert   +10 more
core   +5 more sources

Comparison of Rutherford's atomic model with the Standard Model of particle physics and other models

open access: yesJournal of the Royal Society of New Zealand, Volume 51, Issue 3-4, Page 538-556, September ‐ December 2021., 2021
ABSTRACT Ernest Rutherford is known almost universally as the discoverer of the structure of the atom. He is less well known for his discovery of the proton. Even less well known is a set of hypotheses on the structure of matter that was proposed by Newton 300 years ago.
Philip Yock
wiley   +1 more source

Compressive Sensing Based Space Flight Instrument Constellation for Measuring Gravitational Microlensing Parallax

open access: yesSignals, 2022
In this work, we provide a compressive sensing architecture for implementing on a space based observatory for detecting transient photometric parallax caused by gravitational microlensing events.
Asmita Korde-Patel   +2 more
doaj   +1 more source

Mid-infrared microlensing of accretion disc and dusty torus in quasars: effects on flux ratio anomalies [PDF]

open access: yes, 2013
Multiply-imaged quasars and AGNs observed in the mid-infrared (MIR) range are commonly assumed to be unaffected by the microlensing produced by the stars in their lensing galaxy.
Anguita, T.   +4 more
core   +1 more source

The Fundamental Connections between the Solar System and Exoplanetary Science

open access: yesJournal of Geophysical Research: Planets, Volume 126, Issue 2, February 2021., 2021
Abstract Over the past several decades, thousands of planets have been discovered outside our Solar System. These planets exhibit enormous diversity, and their large numbers provide a statistical opportunity to place our Solar System within the broader context of planetary structure, atmospheres, architectures, formation, and evolution.
Stephen R. Kane   +9 more
wiley   +1 more source

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