Results 91 to 100 of about 333 (144)

The Neutron Star Mass, Distance, and Inclination from Precision Timing of the Brilliant Millisecond Pulsar J0437-4715

open access: yesThe Astrophysical Journal Letters
The observation of neutron stars enables the otherwise impossible study of fundamental physical processes. The timing of binary radio pulsars is particularly powerful, as it enables precise characterization of their (three-dimensional) positions and ...
Daniel J. Reardon   +19 more
doaj   +1 more source

Coupled-mode theory for astrophotonics

open access: yes
Coupled-mode theory (CMT) is a powerful tool for simulating near-harmonic systems. In telecommunications, variations of the theory have been used extensively to study waveguides, both analytically and through numerical modelling. Analogous mathematical techniques to the CMT are also widely used in quantum mechanics.
openaire   +2 more sources

Optical test-bed facility for mid infrared components for sensing, imaging and astrophotonics

open access: yes
Optical test-bed facility for mid infrared components for sensing, imaging and astrophotonics. This test facility will enable Australian researchers to validate optical components and technologies at wavelengths from 2.5 to 20 microns, that are crucial ...

core  

ERASMUS-F: Pathfinder for an E-ELT 3D-instrumentation

open access: yes, 2016
ERASMUS-F is a pathfinder study for a possible E-ELT 3D-instrumentation, funded by the German Ministry for Education and Research (BMBF). The study investigates the feasibility to combine a broadband optical spectrograph with a new generation of multi ...
Bacon, Roland   +10 more
core   +1 more source

Carnegie Supernova Project I and II: Measurements of H 0 Using Cepheid, Tip of the Red Giant Branch, and Surface Brightness Fluctuation Distance Calibration to Type Ia Supernovae

open access: yesThe Astrophysical Journal
We present an analysis of Type Ia supernovae (SNe Ia) from the Carnegie Supernova Project I and II and extend the Hubble diagram from optical to near-infrared wavelengths ( uBgVriYJH ).
Syed A. Uddin   +46 more
doaj   +1 more source

Astrophotonics for Precision Cosmology: Instrumentation and the Galaxy-Halo Connection

open access: yes
Wide-field spectroscopic surveys have transformed cosmology by mapping millions of galaxies and constraining the nature of dark energy. However, the escalating cost-per-spectrum and scaling limitations of conventional spectrographs present a critical ...
DeMartino, Matthew
core  

Line-by-line control of 10,000 modes in a 20 GHz laser frequency comb [PDF]

open access: yes
The independent manipulation of each line in a laser frequency comb is a powerful resource for emerging applications in optical waveform synthesis, spectroscopy, quantum technology, microwave photonics, astrophotonics, and metrology.
Newman, William   +3 more
core   +1 more source

Comparing Recent Pulsar Timing Array Results on the Nanohertz Stochastic Gravitational-wave Background

open access: yesThe Astrophysical Journal
The Australian, Chinese, European, Indian, and North American pulsar timing array (PTA) collaborations recently reported, at varying levels, evidence for the presence of a nanohertz gravitational-wave background (GWB).
G. Agazie   +244 more
doaj   +1 more source

Photonic integrated circuits through femtosecond laser waveguide writing in glass

open access: yes
Integrated photonics is increasingly pivotal across various fields due to its inherent stability, scalability, and compactness. In the landscape of integrated photonic platforms, femtosecond laser writing is a novel microfabrication technique that is ...
Roberto Osellame, Francesco Ceccarelli
core   +1 more source

Ultrafast laser inscription: Science today, technology tomorrow

open access: yes, 2011
Recent advances in the field of ultrafast laser inscription provide ample evidence underscoring the potential of this technique in fabricating novel and previously unthinkable 2D and 3D photonic and optofluidic platforms enabling current sensor ...
D. Choudhury   +9 more
core   +1 more source

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