Results 81 to 90 of about 378,163 (279)

The status and future of EUV astronomy

, 2013
The Extreme Ultraviolet wavelength range was one of the final windows to be opened up to astronomy. Nevertheless, it provides very important diagnostic tools for a range of astronomical objects, although the opacity of the interstellar medium restricts ...
M. A. Barstow (7611788), S. L. Casewell (7589996), J. B. Holberg (7590248), M. P. Kowalski (7590350)   +3 more
core   +3 more sources

Thermal Conduction in Laser‐Driven Tin Plasmas and the Sensitivity of Plasma Properties to the Flux Limiter

Contributions to Plasma Physics, EarlyView.
ABSTRACT We study the role of thermal conduction in laser‐produced tin plasma sources of extreme ultraviolet (EUV) light using radiation‐hydrodynamic simulations. Adopting the flux‐limited Spitzer–Härm approach, we investigate the sensitivity of the electron temperature, electron density, net in‐band emissivity, and conversion efficiency to the choice ...
S. Aggarwal, J. Gonzalez, S. J. J. de Lange, J. Sheil   +3 more
wiley   +1 more source

The Mega-MUSCLES Treasury Survey: X-Ray to Infrared Spectral Energy Distributions of a Representative Sample of M Dwarfs

The Astrophysical Journal
We present 5–1 × 10 ^7 Å spectral energy distributions (SEDs) for 12 M dwarf stars covering spectral types M0–M8. Our SEDs are provided for community use as a sequel to the Measurements of the Ultraviolet Spectral Characteristics of Low-mass Exoplanetary
David J. Wilson, Cynthia S. Froning, Girish M. Duvvuri, Allison Youngblood, Kevin France, Alexander Brown, P. Christian Schneider, Zachory Berta-Thompson, Andrea P. Buccino, Jeffrey Linsky, R. O. Parke Loyd, Yamila Miguel, Elisabeth Newton, J. Sebastian Pineda, Seth Redfield, Aki Roberge, Sarah Rugheimer, Mariela C. Vieytes   +17 more
doaj   +1 more source

Coupling Selective Organic Oxidation With Hydrogen Evolution Over Metal Halide Perovskite Photocatalysts: Halide‐Dependent Design, Mechanisms, and Stability Challenges

EcoEnergy, EarlyView.
This Review highlights how metal halide perovskites enable coupled selective organic oxidation and hydrogen evolution under visible light. It summarizes halide‐dependent design principles, surface engineering strategies, reaction mechanisms, and stability challenges, providing guidance for developing efficient and durable photocatalytic systems ...
Jutarat Jitrada, Lizhen Liu, Patchanita Thamyongkit, Yanfa Yan, Jun Huang   +4 more
wiley   +1 more source

The 2023 Flight of the Faint Intergalactic-medium Redshifted Emission Balloon

The Astrophysical Journal Supplement Series
The second iteration of the Faint Intergalactic-medium Redshifted Emission Balloon (FIREBall-2) is a UV multiobject spectrograph designed to detect emission from the circumgalactic and circumquasar medium at low redshifts ( z < 1).
Drew M. Miles, Vincent Picouet, Zeren Lin, Ignacio Cevallos-Aleman, David Schiminovich, Nicolas Bray, Charles-Antoine Chevrier, Greyson Davis, Erika Hamden, Keri Hoadley, D. Christopher Martin, Bruno Milliard, Johan Montel, David Valls-Gabaud, Simran Agarwal, Philippe Balard, Patrick Blanchard, Harrison Bradley, Haeun Chung, Marty Crabill, Fernando Cruz Aguirre, Xihan Deng, Fabien Harmand, Catherine Hourtolle, Olivia Jones, Nazende I. Kerkeser, Aafaque R. Khan, Gillian Kyne, Jessica S. Li, Nicole Melso, Shouleh Nikzad, Julie Richard, Meghna Sitaram, Jared Termini, Jean-Noel Valdivia, Didier Vibert, Matthew Werneken   +36 more
doaj   +1 more source

Scanning‐Tip and Confocal Raman Characterization of Gold Nanoparticles as Plasmonic Structures for Molecular Sensing

Journal of Raman Spectroscopy, EarlyView.
We apply a sharp silicon tip, typically used for atomic force microscopy (AFM), as a nanoscale probe, and collect frequency‐shifted photons resulting from Raman scattering within the sharp tip. This approach allows us to map local electromagnetic fields in various plasmonic structures and study field “hotspots” with nanometer spatial resolution ...
Zhi Gao, Alexei V. Sokolov
wiley   +1 more source

Does ultraviolet astronomy have a future? [PDF]

Astronomy and Geophysics, 2004
Recent news of the cancellation of further servicing missions for HST and the recent failure of its prime UV spectrograph has brought into focus the limited future for UV astronomy, without rapid action. If this situation does not change, the routine access to the far-UV that we have enjoyed for more than 25 years, since the launch of IUE, will end by ...
openaire   +2 more sources

Rocket and Laboratory Studies in Astronomy

, 2001
This is the final report for NASA Grant NAG5-5122 and covers the period from March 1, 1997 to February 28, 2001. This grant was a continuation of a program in rocket and laboratory studies in ultraviolet astronomy that was supported by NASA grant NAG5 ...
Feldman, Paul D.
core  

Reconfigurable Geometric Phase Matching by Multilayered Nonlinear Thin‐Film Crystals

Laser &Photonics Reviews, EarlyView.
The concept of geometric phase matching is demonstrated as a dynamically reconfigurable approach for tunable nonlinear wave mixing in multilayered nonlinear thin‐film crystals. Experimental results reveal full modulation in a bilayer structure and near‐perfect spin‐selective phase matching of second‐harmonic generation in an eight‐layer configuration ...
Danielle Ben‐Haim, Mai Tal, Xiaoxi Xu, Tal Ellenbogen   +3 more
wiley   +1 more source

Self‐Assembly of a Colloidal Honeycomb Crystal in Silico for Topological Valley Photonics

Small, EarlyView.
The self‐assembly of a colloidal honeycomb crystal is demonstrated in computer simulations, using an assembly strategy that not only suppresses the formation of real‐space topological defects observed experimentally but also yields topological photonic properties in reciprocal space.
Adam Walker, Andreas Neophytou, Piet J. M. Swinkels, Angela Demetriadou, Peter Schall, Dwaipayan Chakrabarti   +5 more
wiley   +1 more source