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pro vyhledávání: '"Avrett, E. H."'
Realistic stellar atmospheric models of two typical metal-poor giant stars in Omega Centauri that include a chromosphere influence the formation of optical lines of Oxygen I: the forbidden lines (630nm, 636nm) and the infrared triplet (777.1-777.5 nm
Externí odkaz:
http://arxiv.org/abs/1603.07381
Autor:
Dupree, A. K., Avrett, E. H.
A direct measure of the helium abundances from the near-infrared transition of He I at 1.08 micron is obtained for two nearly identical red giant stars in the globular cluster Omega Centauri. One star exhibits the He I line; the line is weak or absen
Externí odkaz:
http://arxiv.org/abs/1307.5860
Publikováno v:
Astron.J.138:615-624,2009
Chromospheric model calculations of the Halpha line for selected red giant branch (RGB) and asymptotic giant branch (AGB) stars in the globular clusters M13, M15, and M92 are constructed to derive mass loss rates. The model spectra are compared to th
Externí odkaz:
http://arxiv.org/abs/0906.3420
A continuous set of echelle spectra of TW Hya, taken with the MIKE spectrograph on the Magellan2/Clay telescope at Las Campanas Observatory in April 2006 reveals systematic variations in the flux, velocity, and profile of the H-alpha emission line wh
Externí odkaz:
http://arxiv.org/abs/astro-ph/0702395
We present an overview of radiative transfer modeling efforts to interpret spectra of a variety of stellar objects observed with FUSE. Detailed radiative transfer modeling of high ion emission line profiles of C III and O VI observed in the far-UV sp
Externí odkaz:
http://arxiv.org/abs/astro-ph/0504525
In this paper we have extended our previous modeling of energy balance in the chromosphere-corona transition region to cases with particle and mass flows. The cases considered here are quasi-steady, and satisfy the momentum and energy balance equatio
Externí odkaz:
http://arxiv.org/abs/astro-ph/0109416
Akademický článek
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Autor:
Fontenla, J. M., Curdt, W., Avrett, E. H., Harder, J., Fontenla, J. M., Curdt, W., Avrett, E. H., Harder, J.
Publikováno v:
Astronomy and Astrophysics; June 2007, Vol. 468 Issue: 2 p695-699, 5p
Publikováno v:
Astronomy and Astrophysics; June 2006, Vol. 452 Issue: 2 p651-655, 5p
Publikováno v:
Astronomy and Astrophysics; July 2004, Vol. 421 Issue: 1 p295-303, 9p