Results 41 to 50 of about 3,790 (296)

Recollections of Tucson Operations: The Millimeter-Wave Observatory of the National Radio Astronomy Observatory

open access: yes, 2005
This book is a personal account of the evolution of millimeter-wave astronomy at the National Radio Astronomy Observatory. It begins with the construction of the hugely successful, but flawed, 36 ft radio telescope on Kitt Peak, Arizona, and continues ...
Gordon, M A
core   +1 more source

Phase Evolution Kinetics in Additive‐Free 19.75% Organic Photovoltaics Empowered by Solvent Vapor Annealing

open access: yesAdvanced Functional Materials, EarlyView.
Solvent vapor annealing enables kinetic control of additive‐free morphology in organic solar cells. Selective plasticization of acceptor forms an optimal fibrillar network, boosting efficiency to 19.06% (binary) and 19.75% (ternary), with ultrafast exciton dissociation and reduced recombination.
Jie Lv   +20 more
wiley   +1 more source

Early high-resolution millimeter-wave maps from ToITEC [PDF]

open access: yesEPJ Web of Conferences
TolTEC is a polarization-sensitive camera at millimeter wavelengths with unprecedented sensitivity and 5-10 arcsecond resolution in three photometric bands.
Golec J.
doaj   +1 more source

Study on the Optoelectronic Design for Korean Mobile Satellite Laser Ranging System [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2011
Korea Astronomy and Space Science Institute has been developing one mobile and one stationary satellite laser ranging system for the space geodesy research and precise orbit determination since 2008, which are called as ARGO-M and ARGO-F, respectively.
Hyung-Chul Lim   +10 more
doaj   +1 more source

Performance of hybrid NbTiN-Al microwave kinetic inductance detectors as direct detectors for sub-millimeter astronomy

open access: yes, 2014
In the next decades millimeter and sub-mm astronomy requires large format imaging arrays and broad-band spectrometers to complement the high spatial and spectral resolution of the Atacama Large Millimeter/submillimeter Array.
Yates, S. J. C.   +14 more
core   +1 more source

Tailoring Phonon‐Driven Responses in α‐MoO3 through Isotopic Enrichment

open access: yesAdvanced Materials, EarlyView.
ABSTRACT The implementation of polaritonic materials into nanoscale devices requires selective tuning of parameters to realize desired spectral or thermal responses. One robust material, α‐MoO3, an orthorhombic crystal boasting three distinct phonon dispersions, provides three polaritonic dispersions of hyperbolic phonon polaritons (HPhPs) across the ...
Thiago S. Arnaud   +31 more
wiley   +1 more source

Evidence for the Disruption of a Planetary System During the Formation of the Helix Nebula

open access: yesThe Astronomical Journal, 2022
The persistence of planetary systems after their host stars evolve into their post-main-sequence phase is poorly constrained by observations. Many young white dwarf systems exhibit infrared excess emission and/or spectral absorption lines associated with
Jonathan P. Marshall   +7 more
doaj   +1 more source

Layered Nanoporous Platforms for SERS Sensing

open access: yesAdvanced Materials Interfaces, EarlyView.
Here, we present a detailed investigation of the SERS performance of layered nanoporous metals. The controlled deposition of well‐defined, stacked porous layers enabled a systematic analysis of the effects of multimetallic systems in SERS experiments. Numerical models are also used to support the experimental findings.
Yanqiu Zou   +18 more
wiley   +1 more source

Surveying Flux Density in Galaxies with Apparent Large Black Holes at Millimeter/Submillimeter Wavelengths

open access: yesThe Astrophysical Journal, 2023
We present millimeter and submillimeter continuum observations for 36 sources with potentially large black hole shadows at 230 and 345 GHz using the Submillimeter Array.
Wen-Ping Lo   +7 more
doaj   +1 more source

Highlighting the history of French radio astronomy. 7. The genesis of the Institute of Radioastronomy at Millimeter wavelengths (IRAM) [PDF]

open access: yes, 2011
Radio astronomy in France and in Germany started around 1950. France was then building interferometers and Germany large single dishes, so it was not unexpected that their first projects involving millimetre radio astronomy were respectively with an ...
Gómez-González, Jesús   +5 more
core  

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