Results 31 to 40 of about 487,950 (322)
Photoejection from Various Systems and Radiative-Rate Coefficients
Atoms, 2022 Photoionization or photodetachment is an important process. It has applications in solar- and astrophysics. In addition to accurate wave function of the target, accurate continuum functions are required.
Anand K. Bhatia
doaj +1 more source
Opacity of the Highly Ionized Lanthanides and the Effect on the Early Kilonova [PDF]
Astrophysical Journal, 2022 We investigate the effect of the presence of lanthanides (Z = 57–71) on the kilonova at t ∼ 1 hr after the neutron star merger for the first time. For this purpose, we calculate the atomic structures and the opacities for selected lanthanides: Nd (Z = 60)
S. Banerjee +5 more
semanticscholar +1 more source
International Astronomical Union Colloquium, 1993 AbstractA review is given of opacity calculations made during the past decade.
openaire +1 more source
Updated Opacity Project radiative accelerations [PDF]
Monthly Notices of the Royal Astronomical Society, 2007 Updated data for the calculation of radiative accelerations, grad, referred to as OP 2005, have been made generally available on the Web. They differ from the earlier 1997 OP data mainly in the inclusion of contributions from inner-shell processes. The frequency resolution used for OP 2005 is shown to be satisfactory except for extreme cases of low ...
openaire +1 more source
Helioseismic Tests of Radiative Opacities [PDF]
AIP Conference Proceedings, 2002 During the past fifteen years, thousands of solar acoustic oscillation modes have been measured to remarkable precision, in many cases to within 0.01%. These frequencies have been used to infer the interior structure of the sun and test the physical input to solar models. Here we summarize the procedures, input physics and assumptions for calculating a
openaire +1 more source
A systematic study on 2p → 3d radiative opacity of lowly charged Cu plasmas
AIP Advances, 2021 The L-shell radiative opacity of lowly charged Cu plasmas is investigated using a detailed level accounting method. The transmission spectra are compared with a recent experiment at ∼16 eV and 0.005 g/cm3, and good agreement is observed. For a systematic
Wenhang Yu +6 more
doaj +1 more source
Improvements to Stellar Structure Models, Based on a Grid of 3D Convection Simulations. I. $T(\tau)$-Relations [PDF]
, 2014 Relations between temperature, T, and optical depth, tau, are often used for describing the photospheric transition from optically thick to optically thin in stellar structure models.
Asplund, Martin +4 more
core +1 more source
High Energy Density Physics, 2019 A major problem in stellar modelling is the discrepancy between solar models and helioseismology data in the position of the convective zone-radiative zone boundary in the sun. This could be explained by a large uncertainty in the calculated opacity data
D. Hoarty +10 more
semanticscholar +1 more source
The Stagger-grid: A Grid of 3D Stellar Atmosphere Models - I. Methods and General Properties [PDF]
, 2013 We present the Stagger-grid, a comprehensive grid of time-dependent, 3D hydrodynamic model atmospheres for late-type stars with realistic treatment of radiative transfer, covering a wide range in stellar parameters. This grid of 3D models is intended for
Asplund, M. +7 more
core +1 more source
OPserver: interactive online computations of opacities and radiative accelerations [PDF]
Monthly Notices of the Royal Astronomical Society, 2007 5 pages, 1 ...
Mendoza, Claudio +10 more
openaire +4 more sources