Reverse-Engineering Laboratory Astrophysics: Oxygen Inner-shell Absorption in the ISM.
AIP Conf Proc
; 1811(1)2017 Mar 01.
Article
em En
| MEDLINE
| ID: mdl-32747842
ABSTRACT
The modeling of X-ray spectra from photoionized astrophysical plasmas has been significantly improved due to recent advancements in the theoretical and numerical frameworks, as well as a consolidated and reliable atomic database of inner-shell transitions for all the relevant ions. We discuss these developments and the current state of X-ray spectral modeling in the context of oxygen cold absorption in the interstellar medium (ISM). Unconventionally, we use high-resolution astrophysical observations to accurately determine line positions, and adjust the theoretical models for a comprehensive interpretation of the observed X-ray spectra. This approach has brought to light standing discrepancies in the neutral oxygen absorption-line positions determined from observations and laboratory measurements. We give an overview of our current efforts to devise a definitive model of oxygen photoabsorption that can help to resolve the existing controversy regarding ISM atomic and molecular fractions.
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Base de dados:
MEDLINE
Idioma:
En
Revista:
AIP Conf Proc
Ano de publicação:
2017
Tipo de documento:
Article
País de afiliação:
Estados Unidos