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Challenges on Ultraviolet Astronomy 2014 [PDF]

open access: yesAstrophysics and Space Science, 2014
We are pleased to present this Special Issue of Astrophysics & Space Science; “Challenges on Ultraviolet Astronomy 2014”. This volume comes at a crucial time in Ultraviolet (UV) astronomy. The NASA/ESA programmes that created the community are reaching completion and future missions, apart from the World Space Observatory-Ultraviolet (WSOUV), are small-
Ana I. Gómez de Castro   +4 more
openaire   +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

Extracting Cleaned Swift/UVOT Ultraviolet Grism Spectra with the uvotpy Package

open access: yesThe Astrophysical Journal Supplement Series
The Ultraviolet/Optical Telescope (UVOT) on board the Neil Gehrels Swift Observatory is capable of imaging with seven lenticular filters and of taking slitless spectra with two grisms.
Hao Zhou   +5 more
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

When Poor Exciton Dissociation Limits Photocurrents in Organic Solar Cells: Why Low Offset Non‐Fullerene Acceptor Blends Can't Be Efficient

open access: yesAdvanced Materials, EarlyView.
The energetic offset between the donor and the acceptor components in organic photoactive layers is central to the tradeoff between photovoltage and photocurrent losses. This Perspective covers the most important issues surrounding this topic in non‐fullerene acceptor blends, from the difficulty of accurately determining state energies and driving ...
Dieter Neher, Manasi Pranav
wiley   +1 more source

The AstroSat UV Deep Field South. V. Constraints on the Average Escape of Ionizing Photons in the Cosmic Dusk

open access: yesThe Astrophysical Journal
We investigate the escape of ionizing (Lyman-continuum (LyC)) photons from 49 star-forming galaxies at redshifts of ∼1–1.5, using far-UV imaging from the Ultra-Violet Imaging Telescope on board AstroSat. The sample spans a wide range of stellar masses ( $
Soumil Maulick, Kanak Saha
doaj   +1 more source

HAZMAT. IX. An Analysis of the UV and X-Ray Evolution of Low-mass Stars in the Era of Gaia

open access: yesThe Astrophysical Journal, 2023
Low-mass stars (≤1 M _⊙ ) are some of the best candidates for hosting planets with detectable life because of these stars’ long lifetimes and relative ratios of planet to star mass and radius.
Tyler Richey-Yowell   +8 more
doaj   +1 more source

Deterministic Nucleation of Nanocrystal Superlattices on 2D Perovskites for Light‐Funneling Heterostructures

open access: yesAdvanced Materials, EarlyView.
This work investigates the heterogeneous nucleation of CsPbBr3${\rm CsPbBr}_3$ nanocrystal superlattices along the faces of 2D PEA2PbBr4${\rm PEA}_2{\rm PbBr}_4$ layered perovskite microcrystals. Core–crown and core–shell heterostructure morphologies are obtained.
Umberto Filippi   +6 more
wiley   +1 more source

Stellar Library of Differential Emission Measures and Extreme Ultraviolet Spectra: Dwarf Stars Observed by the Extreme Ultraviolet Explorer

open access: yesThe Astrophysical Journal
Extreme ultraviolet (EUV; 100–912 Å) photons influence the formation and evolution of planets by ionizing hydrogen and other species, but the EUV radiation of most exoplanet host stars is poorly constrained.
Girish M. Duvvuri   +10 more
doaj   +1 more source

Size–Mass Relation Shows Its Colours: Contrasting Physical Imprints of Galaxy Evolution in Rest-Frame UV and Optical

open access: yesGalaxies
The galaxy size–mass relation (SMR) is a key scaling relation used to constrain the physical processes that build galaxy structure, yet it is almost always measured in a single rest-frame optical band, where the light traces the bulk of the old stellar ...
Angelo George   +2 more
doaj   +1 more source

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