Zobrazeno 1 - 10
of 52
pro vyhledávání: '"Lykins, M."'
Autor:
Ferland, G. J., Chatzikos, M., Guzmán, F., Lykins, M. L., van Hoof, P. A. M., Williams, R. J. R., Abel, N. P., Badnell, N. R., Keenan, F. P., Porter, R. L., Stancil, P. C.
Publikováno v:
2017RMxAA..53..385F
We describe the 2017 release of the spectral synthesis code Cloudy. A major development since the previous release has been exporting the atomic data into external data files. This greatly simplifies updates and maintenance of the data. Many large da
Externí odkaz:
http://arxiv.org/abs/1705.10877
Autor:
Lykins, M. L., Ferland, G. J., Kisielius, R., Chatzikos, M., Porter, R. L., van Hoof, P. A. M., Williams, R. J. R., Keenan, F. P., Stancil, P. C.
We describe a new atomic and molecular database we developed for use in the spectral synthesis code Cloudy. The design of Stout is driven by the data needs of Cloudy, which simulates molecular, atomic, and ionized gas with kinetic temperatures 2.8 K
Externí odkaz:
http://arxiv.org/abs/1506.01741
Autor:
van Hoof, P. A. M., Ferland, G. J., Williams, R. J. R., Volk, K., Chatzikos, M., Lykins, M., Porter, R. L.
Publikováno v:
MNRAS, 449, 2112 (2015)
When modelling an ionised plasma, all spectral synthesis codes need the thermally averaged free-free Gaunt factor defined over a very wide range of parameter space in order to produce an accurate prediction for the spectrum. Until now no data set exi
Externí odkaz:
http://arxiv.org/abs/1502.06788
Autor:
Chatzikos, M., Williams, R. J. R., Ferland, G. J., Canning, R. E. A., Fabian, A. C., Sanders, J. S., van Hoof, P. A. M., Johnstone, R. M., Lykins, M., Porter, R. L.
We announce a new facility in the spectral code CLOUDY that enables tracking the evolution of a cooling parcel of gas with time. For gas cooling from temperatures relevant to galaxy clusters, earlier calculations estimated the [Fe XIV] {\lambda}5303
Externí odkaz:
http://arxiv.org/abs/1410.4566
Autor:
van Hoof, P. A. M., Williams, R. J. R., Volk, K., Chatzikos, M., Ferland, G. J., Lykins, M., Porter, R. L., Wang, Y.
Publikováno v:
MNRAS, 444, 420 (2014)
Modern spectral synthesis codes need the thermally averaged free-free Gaunt factor defined over a very wide range of parameter space in order to produce an accurate prediction for the spectrum emitted by an ionized plasma. Until now no set of data ex
Externí odkaz:
http://arxiv.org/abs/1407.5048
Autor:
Wang, Ye, Ferland, G. J., Lykins, M. L., Porter, R. L., van Hoof, P. A. M., Williams, R. J. R.
Publikováno v:
2014, MNRAS 440, 3100
This work follows Lykins et al. discussion of classic plasma cooling function at low density and solar metallicity. Here we focus on how the cooling function changes over a wide range of density (n_H<10^12 cm^(-3)) and metallicity (Z<30Z _sun ). We f
Externí odkaz:
http://arxiv.org/abs/1403.3076
Autor:
Ferland, G. J., Kisielius, R., Keenan, F. P., van Hoof, P. A. M., Jonauskas, V., Lykins, M. L., Porter, R. L., Williams, R. J. R.
The Fe unresolved transition array (UTAs) produce prominent features in the 15-17?A wavelength range in the spectra of Active Galactic Nuclei (AGN). Here we present new calculations of the energies and oscillator strengths of inner- shell lines from
Externí odkaz:
http://arxiv.org/abs/1303.0316
Autor:
Ferland, G. J., Porter, R. L., van Hoof, P. A. M., Williams, R. J. R., Abel, N. P., Lykins, M. L., Shaw, Gargi, Henney, W. J., Stancil, P. C.
This is a summary of the 2013 release of the plasma simulation code Cloudy. Cloudy models the ionization, chemical, and thermal state of material that may be exposed to an external radiation field or other source of heating, and predicts observables
Externí odkaz:
http://arxiv.org/abs/1302.4485
Autor:
Lykins, M. L., Ferland, G. J., Porter, Ryan L., van Hoof, Peter A. M., Williams, R. J. R., Gnat, Orly
We discuss recent improvements in the calculation of the radiative cooling in both collisionally and photo ionized plasmas. We are extending the spectral simulation code Cloudy so that as much as possible of the underlying atomic data is taken from e
Externí odkaz:
http://arxiv.org/abs/1212.1233
Autor:
Johnstone, R. M., Canning, R. E. A., Fabian, A. C., Ferland, G. J., Lykins, M., Porter, R. L., van Hoof, P. A. M., Williams, R. J. R.
Far ultraviolet emission has been detected from a knot of Halpha emission in the Horseshoe filament, far out in the NGC 1275 nebula. The flux detected relative to the brightness of the Halpha line in the same spatial region is very close to that expe
Externí odkaz:
http://arxiv.org/abs/1206.6336