Zobrazeno 1 - 10
of 134
pro vyhledávání: '"Ramsbottom, C. A."'
Autor:
Sarkar, A., Ferland, G. J., Chatzikos, M., Guzmán, F., van Hoof, P. A. M., Smyth, R. T., Ramsbottom, C. A., Keenan, F. P., Ballance, C. P.
Understanding the Fe II emission from Active Galactic Nuclei (AGN) has been a grand challenge for many decades. The rewards from understanding the AGN spectra would be immense, involving both quasar classification schemes such as "Eigenvector 1" and
Externí odkaz:
http://arxiv.org/abs/2011.09007
Heavy-metal hot subdwarfs (sdB and sdO) represent a small group of stars with unusually high concentrations of trans-iron elements in their atmospheres, having abundances ~ 10000 times solar. One example is LS IV-14$^{\circ}$ 116, where a number of h
Externí odkaz:
http://arxiv.org/abs/2004.13589
Autor:
Shingles, L. J., Sim, S. A., Kromer, M., Maguire, K., Bulla, M., Collins, C., Ballance, C. P., Michel, A. S., Ramsbottom, C. A., Roepke, F. K., Seitenzahl, I. R., Tyndall, N. B.
Publikováno v:
Monthly Notices of the Royal Astronomical Society, Volume 492, Issue 2, February 2020, Pages 2029-2043
We extend the range of validity of the ARTIS 3D radiative transfer code up to hundreds of days after explosion, when Type Ia supernovae are in their nebular phase. To achieve this, we add a non-local thermodynamic equilibrium (non-LTE) population and
Externí odkaz:
http://arxiv.org/abs/1912.02214
Akademický článek
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Akademický článek
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Publikováno v:
Phys. Rev. A 97, 052705 (2018)
Neutral tungsten is the primary candidate as a wall material in the divertor region of the International Thermonuclear Experimental Reactor (ITER). The efficient operation of ITER depends heavily on precise atomic physics calculations for the determi
Externí odkaz:
http://arxiv.org/abs/1805.02757
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
Modelling of massive stars and supernovae (SNe) plays a crucial role in understanding galaxies. From this modelling we can derive fundamental constraints on stellar evolution, mass-loss processes, mixing, and the products of nucleosynthesis. Proper a
Externí odkaz:
http://arxiv.org/abs/1605.05523
Autor:
Ramsbottom, C. A.1 (AUTHOR) c.ramsbottom@qub.ac.uk, Ballance, C. P.1 (AUTHOR), McCann, M.1 (AUTHOR)
Publikováno v:
European Physical Journal D (EPJ D). May2023, Vol. 77 Issue 5, p1-9. 9p.
New radiative and collisional atomic data for Sr ii and Y ii with application to Kilonova modelling.
Publikováno v:
Monthly Notices of the Royal Astronomical Society; Aug2024, Vol. 532 Issue 2, p2289-2308, 20p