Results 31 to 40 of about 293,669 (270)

Image et mesure : deux cultures aux origines de l’astrophysique française

open access: yesCahiers François Viète, 2006
In the commission preparing the 1874 transit of Venus, debates about the choice of photographic techniques are illustrative of the stakes that would come to characterize the beginning of astronomy in France over the following decades.
Stéphane Le Gars
doaj   +1 more source

Solution‐Processed Mn‐Doped 2d Perovskite Wavelength Shifters for Noble‐Liquid Photon Detection

open access: yesAdvanced Functional Materials, EarlyView.
Solution‐processed Mn2+‐doped PEA2PbBr4 two‐dimensional perovskite films are demonstrated as large‐area wavelength shifters for noble‐liquid photon detectors. Mn2+ incorporation introduces a broad emission band at ∼620 nm with a large Stokes shift, suppressing self‐absorption and matching SiPM sensitivity.
Elisabetta Colantoni   +6 more
wiley   +1 more source

The NASA Astrophysics Data System: Free Access to the Astronomical Literature On-Line and through Email [PDF]

open access: yes, 2001
The Astrophysics Data System (ADS) provides access to the astronomical literature through the World Wide Web. It is a NASA funded project and access to all the ADS services is free to everybody world-wide.
Kurtz, Michael J.   +4 more
core   +1 more source

The new worlds observer: The astrophysics strategic mission concept study

open access: yesEPJ Web of Conferences, 2011
We present some results of the Astrophysics Strategic Mission Concept Study for the New Worlds Observer (NWO). We show that the use of starshades is the most effective and affordable path to mapping and understanding our neighboring planetary systems, to
Cash W.
doaj   +1 more source

The Blazar Sequence and Its Physical Understanding

open access: yesGalaxies, 2022
Introduced in 1998 to attempt a first unified view of the broad-band emission properties of blazars, the blazar sequence has been extensively used in the past 25 years to guide observations as well as the physical interpretation of the overall emission ...
Elisa Prandini, Gabriele Ghisellini
doaj   +1 more source

Programming Nanoscale Reaction Environments via Peptide Localization for Gold Nanoparticle Growth in Liposomal Nanoreactors

open access: yesAdvanced Functional Materials, EarlyView.
The liposome nanoreactor method enables uniform metal nanoparticle synthesis using the interior as a reaction environment. We demonstrate that peptide sequences and lipid compositions act as a functional molecular switch to control reaction environments in liposome nanoreactors.
Yuya Abe   +6 more
wiley   +1 more source

Disorder‐Broadened Topological Hall Phase and Anomalous Hall Scaling in FeGe

open access: yesAdvanced Functional Materials, EarlyView.
By systematically introducing defects into FeGe via ion‐beam modification, we demonstrate that disorder broadens the temperature regime over which the topological Hall effect ‐ a signature of skyrmions or other chiral textures — appears, while also increasing its magnitude.
Chaman Gupta   +11 more
wiley   +1 more source

Astronomy & Astrophysics (CAUCASUS)-VOLUME 4

open access: yes, 2018
The IV volume of Journal “Astronomy & Astrophysics (Caucasus)” was dedicated to the 110th Anniversary of Academician Victor Hambardzumyan. AcademicianVictor Hambardzumyan President of International Union of Astronomy (in 1961 – 1964 and 1966 – 72 ...
(CAUCASUS), Astronomy & Astrophysics
core   +1 more source

Bulk‐Like Spin Cycloid and Fast Switching in Freestanding BiFeO3

open access: yesAdvanced Functional Materials, EarlyView.
Freestanding BiFeO3 membranes overcome substrate‐induced constraints by simultaneously restoring the intrinsic bulk‐like spin cycloid and enabling ≈50% faster ferroelectric switching than substrate‐clamped epitaxial thin films. This combination of robust noncollinear antiferromagnetic order and efficient electric‐field switching establishes ...
Pratap Pal   +12 more
wiley   +1 more source

Mathematics and explanation in astronomy and astrophysics [PDF]

open access: yes, 2007
The purpose of this paper is to expound and clarify the mathematics and explanations commonly employed in certain notable areas of astronomy and astrophysics.
McCabe, Gordon, Gordon Mccabe
core  

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