Results 81 to 90 of about 34,048 (260)

HELIOS-K: AN ULTRAFAST, OPEN-SOURCE OPACITY CALCULATOR FOR RADIATIVE TRANSFER [PDF]

The Astrophysical Journal, 2015
We present an ultrafast opacity calculator that we name HELIOS-K. It takes a line list as an input, computes the shape of each spectral line and provides an option for grouping an enormous number of lines into a manageable number of bins. We implement a combination of Algorithm 916 and Gauss-Hermite quadrature to compute the Voigt profile, write the ...
Simon L. Grimm, Kevin Heng
openaire   +4 more sources

Radiative accelerations on Ne in the atmospheres of late B stars

, 2002
Radiative accelerations on Ne are calculated for the atmospheres of main sequence stars with 11000 < Teff < 15000 K, corresponding to the range of the HgMn stars.
Budaj, J., Dworetsky, M. M.
core   +4 more sources

Scalable Perovskite Quantum Dot Glass Nanocomposites for High‐Efficiency Luminescent Solar Concentrators

Advanced Functional Materials, EarlyView.
This study evaluates the scalability of PQD GNC‐based LSCs for BIPV applications. Experimental data and Monte Carlo simulations predict performance up to 1 m2, achieving a peak power conversion efficiency of 3.17%. The results confirm the viability of these LSCs for energy‐efficient building applications.
Emre İlter, Utku Ekim, Elshan Asadi, Konstantin Tsoi, Selçuk Yerci, Miray Çelikbilek Ersundu, Ali Erçin Ersundu   +6 more
wiley   +1 more source

The formation of IRIS diagnostics V. A quintessential model atom of C II and general formation properties of the C II lines at 133.5 nm

, 2015
The 133.5 nm lines are important observables for the NASA/SMEX mission Interface Region Imaging Spectrograph (IRIS). To make 3D non-LTE radiative transfer computationally feasible it is crucial to have a model atom with as few levels as possible while ...
Carlsson, Mats, Rathore, Bhavna
core   +1 more source

Asteroseismology of Massive Stars : Some Words of Caution [PDF]

, 2014
Although playing a key role in the understanding of the supernova phenomenon, the evolution of massive stars still suffers from uncertainties in their structure, even during their "quiet" main sequence phase and later on during their subgiant and helium ...
Gabriel, M., Godart, M., Miglio, A., Montalban, J., Noels, A., Salmon, S.   +5 more
core   +1 more source

Bright Monocompound Metal Halide Scintillator for Fast Neutron Radiography

Advanced Functional Materials, EarlyView.
Metal halide scintillator, tetraphenylphosphonium manganese bromide (TPP2MnBr4), provides a significant benefit for fast neutron imaging. A fourfold increase in efficiency over traditional zinc sulfide screens is achieved by efficiently utilizing neutron interactions within its homogeneous structure.
Aditya Bhardwaj, Kostiantyn Sakhatskyi, Anastasiia Sakhatska, Pavel Trtik, Ye Wu, Yevhenii Padniuk, Yuliia Kominko, Kai Han, Vladyslav Orlov, Markus Strobl, Andrey L. Rogach, Zhiguo Xia, Sergii Yakunin, Maksym V. Kovalenko   +13 more
wiley   +1 more source

On the Spectrum and Polarization of Magnetar Flare Emission

Galaxies, 2018
Bursts and flares are among the distinctive observational manifestations of magnetars, isolated neutron stars endowed with an ultra-strong magnetic field ( B ≈ 10 14 – 10 15 G).
Roberto Taverna, Roberto Turolla
doaj   +1 more source

Radiative transfer with scattering for domain-decomposed 3D MHD simulations of cool stellar atmospheres

, 2010
We present the implementation of a radiative transfer solver with coherent scattering in the new BIFROST code for radiative magneto-hydrodynamical (MHD) simulations of stellar surface convection.
Allende Prieto, Allison, Anderson, Asplund, B. V. Gudiksen, Bautista, Bautista, Bell, Bell, Bell, Broad, Bruls, Caffau, Cannon, Collet, Doyle, Dravins, Däppen, Feautrier, Fritsch, Gavrila, Gustafsson, Gustafsson, Gustafsson, Gustafsson, Hauschildt, Hauschildt, Heinemann, Holweger, Hummer, J. Leenaarts, John, John, Jørgensen, Karzas, Kunasz, Kurucz, Kurucz, Langhoff, M. Asplund, M. Carlsson, Mihalas, Mihalas, Mihalas, Muthsam, Nahar, Nahar, Nahar, Nahar, Nahar, Nahar, Nahar, Nahar, Nahar, Nahar, Nordlund, Nordlund, Olson, Peach, Pereira, Pereira, Peytremann, R. Collet, R. Trampedach, Ramsbottom, Ramírez, Seaton, Short, Skartlien, Stancil, Stein, Trujillo Bueno, V. H. Hansteen, van Regemorter, Victor, Vögler, Vögler, W. Hayek, Wedemeyer, Wehrse, Wishart   +80 more
core   +1 more source

Cumulative theoretical uncertainties in lithium depletion boundary age [PDF]

, 2015
We performed a detailed analysis of the main theoretical uncertainties affecting the age at the lithium depletion boundary (LDB). To do that we computed almost 12000 pre-main sequence models with mass in the range [0.06, 0.4] M_sun by varying input ...
Asplund, Badnell, Bildsten, Burke, Descouvemont, Gennaro, Krishna Swamy, Lamia, Rogers, Saumon, Tognelli, Tognelli, Tognelli, Tumino, Valle   +14 more
core   +2 more sources

Colloidal Opaline Composites as Throughput‐Scalable, Fully Transparent, and Color‐Tunable Radiative Cooling Exterior Films for Outdoor Photovoltaics

Advanced Functional Materials, EarlyView.
Particular thermal metamaterials are widely used as daytime radiative coolers merely by embedding thermally emissive nanoparticles (NPs) in liquid resins to form scalable, yet highly efficient cooling films in a cost‐effective way. However, randomly dispersed NPs, prevalently used thus far, cause strong scattering, limiting NP content and cooling ...
YongDeok Cho, Hyeon Ho Kim, Sewon Ahn, Jaewon Lee, Jieun Lee, Kwangjin Kim, Soyul Kwak, Hoodam Lee, Kyungsik Choi, Kyonghwa Song, Seungwoo Lee   +10 more
wiley   +1 more source