Results 71 to 80 of about 6,507,263 (232)

Scalable Room‐Temperature Terahertz Graphene Cameras

Small Methods, EarlyView.
ABSTRACT Terahertz (THz) imaging has emerged as a powerful tool for non‐destructive, label‐free analysis across several scientific disciplines, ranging from materials science to biomedical research. By capturing the spatial‐dependent information in a broad range of frequencies, this technique enables the identification of chemical composition ...
Lili Shi, Leonardo Viti, Miriam S. Vitiello   +2 more
wiley   +1 more source

Extreme Radio Flares and Associated X-Ray Variability from Young Stellar Objects in the Orion Nebula Cluster [PDF]

, 2017
Young stellar objects are known to exhibit strong radio variability on timescales of weeks to months, and a few reports have documented extreme radio flares with at least an order of magnitude change in flux density on timescales of hours to days ...
Wolk, Scott J., Rivilla, Victor M., Reid, Mark J., Karl M. Menten, Chandler, C., Scott J. Wolk, Urvashi Rau, Forbrich, Jan, Victor M. Rivilla, Mark J. Reid, Jan Forbrich, Forbrich, J., Menten, Karl M., Menten, K., Rau, U., Chandler, Claire J., Reid, M., Wolk, S., Claire J. Chandler, Rivilla, V., Rau, Urvashi   +20 more
core   +1 more source

Thermal X-rays from stellar flares - Reevaluation of scaling from solar flares

The Astrophysical Journal, 1976
We suggest that, close to the time of maximum luminosity in both solar and stellar flares, the ratio of thermal X-ray luminosity, L/sub x/, to optical luminosity, L/sub v/, is given by the ratio of radiative to conductive energy loss rates from the X-ray flare plasma.
openaire   +1 more source

X-ray-heated models of stellar flare atmospheres - Theory and comparison with observations

The Astrophysical Journal Supplement Series, 1992
A sequence of five model atmospheres consisting of the photosphere, chromosphere, and transition region is computed. The models represent the response of the gas in a magnetically confined loop to intense flare energy release. It is assumed that the energy release is confined to the corona, and the effects of chromospheric evaporation and indirect ...
Suzanne L. Hawley, George H. Fisher
openaire   +1 more source

A radio jet from the optical and x-ray bright stellar tidal disruption flare ASASSN-14li [PDF]

Science, 2016
Transient radio jet from a black hole When a star passes too close to a supermassive black hole, it gets ripped apart by the gravitational forces. This causes a tidal disruption flare as the material falls into the black hole. van Velzen et al.
van Velzen, S., Anderson, Gemma, Stone, N., Fraser, M., Wevers, T., Metzger, B., Jonker, P., van der Horst, A., Staley, T., Mendez, A., Miller-Jones, J., Hodgkin, S., Campbell, H., Fender, R.   +13 more
openaire   +6 more sources

Sequential Reduction of Chromite Pellets Using Hydrogen and Silicon Carbide for Carbon Emission Abatement During Ferrochrome Production

steel research international, EarlyView.
H2 prereduction selectively metallizes Fe in UG2 chromite pellets at 1100°C, while silicon carbide becomes active at 1300°C to convert remaining Cr2O3 to carbides and promote Cr metallization. By separating the roles of H2 and SiC, the sequential route reaches up to 65.7% Cr metallization and suppresses in‐furnace CO generation by ≈75% versus ...
D. Coertzen, M. Tangstad, J. P. Beukes, P. G. van Zyl, D. G. Bessarabov, S. P. du Preez   +5 more
wiley   +1 more source

Short-Duration X-ray Transients Observed With WATCH on Granat: Are Some of Them Related to Stellar Flares? [PDF]

International Astronomical Union Colloquium, 1995
AbstractDuring 1990-92, the WATCH all-sky X-ray monitor on GRANAT has discovered 6 short-duration X-ray transients. We discuss their possible relationship to peculiar stars. Only one source, GRS 1100-77 seems to be related to a T Tauri star.
Alberto J. Castro-Tirado, Søren Brandt, Niels Lund, Igor Lapshov, Rashid Sunyaev   +4 more
openaire   +1 more source

Statistical Study of the Timing of the Appearance of Hα Postflare Loops: Simple Scaling Law Based on Radiative Cooling

The Astrophysical Journal
Recent Sun-as-a-star studies have shown that postflare loops can manifest as a secondary peak in the H α light curve, suggesting that stellar postflare loops are detectable.
Takato Otsu, Ayumi Asai, Kai Ikuta, Kazunari Shibata   +3 more
doaj   +1 more source

Updated EAACI Statement on Drug Hypersensitivity Skin Testing: Methodology and Non‐Irritative Concentrations

Allergy, EarlyView.
ABSTRACT These updated EAACI guidelines aim to standardize skin testing methodologies for both immediate and non‐immediate drug hypersensitivity reactions. For immediate reactions, the optimal testing window is 4–6 weeks post‐reaction; whereas beyond 6 months, false‐negative results increase.
Annick Barbaud, Lene Heise Garvey, Elizabeth Phillips, Michael Ardern‐Jones, Sevim Bavbek, Patrizia Bonadonna, Jean‐Christoph Caubet, Ana‐Maria Copaescu, Valentina Gueli, Jose Julio Laguna, Ricardo Madrigal‐Burgaleta, Francesca Mori, Vito Sabato, Maria J Torres, Knut Brockow   +14 more
wiley   +1 more source

Activity and rotation of the X-ray emitting Kepler stars [PDF]

, 2017
The relation between magnetic activity and rotation periods in late-type stars provides fundamental information on the stellar dynamo and spin evolution.
Marelli, M., MICELA, Giuseppina, Belfiore, A., Salvetti, D., DE LUCA, Andrea, PORETTI, Ennio, STELZER, BEATE, Pizzocaro, D.   +7 more
core