Zobrazeno 1 - 10
of 60
pro vyhledávání: '"Preval, S. P."'
To calculate realistic models of objects with Ni in their atmospheres, accurate atomic data for the relevant ionization stages need to be included in model atmosphere calculations. In the context of white dwarf stars, we investigate the effect of cha
Externí odkaz:
http://hdl.handle.net/10150/623044
http://arizona.openrepository.com/arizona/handle/10150/623044
http://arizona.openrepository.com/arizona/handle/10150/623044
Autor:
Hu, J., Webb, J. K., Ayres, T. R., Bainbridge, M. B., Barrow, J. D., Barstow, M. A., Berengut, J. C., Carswell, R. F., Dumont, V., Dzuba, V., Flambaum, V. V., Lee, C. C., Reindl, N., Preval, S. P., Tchang-Brillet, W. -Ü. L.
The gravitational potential phi = GM/Rc^2 at the surface of the white dwarf G191-B2B is 10,000 times stronger than that at the Earth's surface. Numerous photospheric absorption features are detected, making this a suitable environment to test theorie
Externí odkaz:
http://arxiv.org/abs/2007.10905
Autor:
Preval, S. P., Barstow, M. A., Bainbridge, M., Reindl, N., Ayres, T., Holberg, J. B., Barrow, J. D., Lee, C. C., Webb, J. K., Hu, J.
Using newly obtained high-resolution data ($R\sim{1\times{10}^{5}}$) from the \textit{Hubble Space Telescope}, and archival UV data from the \textit{Far Ultraviolet Spectroscopic Explorer} we have conducted a detailed UV survey of the three hot, meta
Externí odkaz:
http://arxiv.org/abs/1905.12350
Autor:
Hu, J., Webb, J. K., Ayres, T. R., Bainbridge, M. B., Barrow, J. D., Barstow, M. A., Berengut, J. C., Carswell, R. F., Dzuba, V. A., Flambaum, V. V., Holberg, J. B., Lee, C. C., Preval, S. P., Reindl, N., Tchang-Brillet, W. -Ü L.
White dwarf atmospheres are subjected to gravitational potentials around $10^5$ times larger than occur on Earth. They provide a unique environment in which to search for any possible variation in fundamental physics in the presence of strong gravita
Externí odkaz:
http://arxiv.org/abs/1812.11480
The experimental thermonuclear reactor, ITER, is currently being constructed in Cadarache, France. The reactor vessel will be constructred with a beryllium coated wall, and a tungsten coated divertor. As a plasma-facing component, the divertor will b
Externí odkaz:
http://arxiv.org/abs/1811.10726
Autor:
Delahaye, F., Badnell, N. R., Ballance, C. P., Palmeri, P., Preval, S., Quinet, P., Ramsbottom, C., Smyth, R. T., Turkington, M., Zeippen, C. J.
Publikováno v:
in print 2018
The present debate on the reliability of astrophysical opacities has reached a new climax with the recent measurements of Fe opacities on the Z-machine at the Sandia National Laboratory \citep{Bailey2015}. To understand the differences between theore
Externí odkaz:
http://arxiv.org/abs/1804.03365
Publikováno v:
2018 J. Phys. B: At. Mol. Opt. Phys. 51 045004
Tungsten is an important element for magnetically confined fusion plasmas but has the potential to cool, or even quench the plasma due to it being an efficient radiator. Total and level-resolved dielectronic recombination (DR) rate coefficients, for
Externí odkaz:
http://arxiv.org/abs/1712.04233
Dielectronic recombination (DR) is the dominant mode of recombination in magnetically confined fusion plasmas for intermediate to low-charged ions of W. Complete, final-state resolved partial isonuclear W DR rate coefficient data is required for deta
Externí odkaz:
http://arxiv.org/abs/1703.10529
To calculate realistic models of objects with Ni in their atmospheres, accurate atomic data for the relevant ionization stages needs to be included in model atmosphere calculations. In the context of white dwarf stars, we investigate the effect of ch
Externí odkaz:
http://arxiv.org/abs/1610.09662
Tungsten is an important metal in nuclear fusion reactors. It will be used in the divertor component of ITER (Latin for 'the way'). The Tungsten Project aims to calculate partial and total DR rate coefficients for the isonuclear sequence of Tungsten.
Externí odkaz:
http://arxiv.org/abs/1610.06200