Results 151 to 160 of about 5,472,881 (330)

A Fast, Second-order Accurate Poisson Solver in Spherical Polar Coordinates

The Astrophysical Journal Supplement Series
We present an efficient and accurate algorithm for solving the Poisson equation in spherical polar coordinates with a logarithmic radial grid and open boundary conditions.
Jeonghyeon Ahn, Woong-Tae Kim, Yonghwi Kim   +2 more
doaj   +1 more source

The McXtrace AstroX toolbox: a general ray tracing software package for end to end simulation of x-ray optics for astronomical instrumentation [PDF]

, 2018
Erik Knudsen, Desirée Della Monica Ferreira, N. J. Westergaard, Sonny Massahi, Finn E. Christensen, Ivo Ferreira, Brian Shortt, Daniele Spiga   +7 more
openalex   +1 more source

Phase Topology Stability of an Optical Vortex via an Electrically Controlled Twist‐Planar Oriented Liquid Crystal Fresnel Lens

Advanced Optical Materials, EarlyView.
A simple and efficient method for determining the stability of optical vortices via Fourier transform using a conventional spherical lens is presented. The theoretical and experimental results demonstrate a practical approach to directly and unambiguously measure the magnitude and sign of the topological charge of a beam without altering an ...
Elena Melnikova, Katsiaryna Pantsialeyeva, Dmitry Gorbach, Alexei Tolstik, Sergei Slussarenko Jr., Alina Karabchevsky   +5 more
wiley   +1 more source

Modelling the Galaxy in the era of Gaia

, 2009
The body of photometric and astrometric data on stars in the Galaxy has been growing very fast in recent years (Hipparcos/Tycho, OGLE-3, 2-Mass, DENIS, UCAC2, SDSS, RAVE, Pan Starrs, Hermes, ...) and in two years ESA will launch the Gaia satellite, which
Binney, James
core  

Hundreds of Nanocoulomb Electron Acceleration Driven by Multipetawatt Laser in Subcritical Density Plasmas

Advanced Photonics Research, EarlyView.
Electron acceleration using multipetawatt femtosecond lasers and subcritical density plasmas achieves a maximum charge of 245 nC, with an injection rate of up to 100 nC per picosecond. The charge variation with plasma density, initially increasing and then decreasing, arises from the competition between the injection of multiple plasma waves and laser ...
Xi‐Chen Hu, Ming‐Yang Zhu, Yi‐Fei Li, Jie Feng, Guang‐Wei Lu, Yao‐Jun Li, Xu‐Lei Ge, Xiao‐Jun Huang, Wen‐Chao Yan, Li‐Ming Chen   +9 more
wiley   +1 more source

Structure of air motion along optical paths inside specialized rooms of astronomical telescopes. Numerical simulation [PDF]

, 2015

openalex   +1 more source

A Proof‐of‐Concept Assessment of a Novel Wearable Eyelid Muscle Device: A Pre‐Clinical Animal Cadaver Study for Eyelid Closure Restoration

Advanced Robotics Research, EarlyView.
This article introduces a soft wearable eyelid sling device incorporating a hydraulic soft artificial muscle (SAM) for achieving complete closure of an eyelid. The SAM is driven by a cam mechanism that provides a displacement profile closely matched with those of a healthy eyelid.
Patrick Pruscino, Phuoc Thien Phan, James Davies, Bibhu Sharma, Tianruo Guo, Chi Cong Nguyen, Nigel H. Lovell, Thanh Nho Do   +7 more
wiley   +1 more source

Caught in the Act: Detections of Recoiling Supermassive Black Holes from Simulations

The Astrophysical Journal
We study the detectability of supermassive black holes (SMBHs) with masses of M _•  ≳ 10 ^9 M _⊙ displaced by gravitational wave recoil kicks ( v _kick  = 0–2000 km s ^−1 ) in simulations of merging massive ( M _⋆  > 10 ^11 M _⊙ ) early-type galaxies ...
Alexander Rawlings, Peter H. Johansson, Thorsten Naab, Antti Rantala, Jens Thomas, Bianca Neureiter   +5 more
doaj   +1 more source

Global Vlasov simulation on magnetospheres of astronomical objects [PDF]

, 2013
Takayuki Umeda, Yosuke Ito, Keiichiro Fukazawa   +2 more
openalex   +1 more source

Enhancing Voltage Tolerance of CsFA Perovskite‐Based Rectifying Diodes Through Ionic Liquid Incorporation

Advanced Sustainable Systems, EarlyView.
CsFAPbI3 perovskite diodes show superior low‐voltage rectification. Ionic liquid incorporation suppresses ion migration and enhances voltage tolerance, enabling durable performance for AC–DC conversion and other optoelectronic devices. Abstract Metal halide perovskites have gained significant attention owing to their remarkable semiconductor properties
Hiromu Hamazaki, Hiroki Matsui, Naoya Tanaka, Tomoki Kobayashi, Ruka Yazawa, Md. Shahiduzzaman, Tetsuya Taima, Makoto Karakawa, Koichi Iiyama, Jean‐Michel Nunzi, Masahiro Nakano   +10 more
wiley   +1 more source