On the importance of satellite lines to the He-like K ALPHA complex and the G ratio for calcium, iron, and nickel - AstrophysicsReportar como inadecuado




On the importance of satellite lines to the He-like K ALPHA complex and the G ratio for calcium, iron, and nickel - Astrophysics - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Abstract: New, more detailed calculations of the emission spectra of the He-like KALPHA complex of calcium, iron and nickel have been carried out using data fromboth distorted-wave and R-matrix calculations. The value of the GD ratio anextended definition of the G ratio that accounts for the effect of resolved andunresolved satellite lines is significantly enhanced at temperatures below thetemperature of He-like maximum abundance. Furthermore it is shown thatsatellite lines are important contributors to the GD ratio such that GD-G>1 attemperatures well above the temperature of maximum abundance. These newcalculations demonstrate, with an improved treatment of the KLn n>=3satellite lines, that K ALPHA satellite lines need to be included in models ofHe like spectra even at relatively high temperatures. The excellent agreementbetween spectra and line ratios calculated from R-matrix and distorted-wavedata also confirms the validity of models based on distorted-wave data forhighly charged systems, provided the effect of resonances are taken intoaccount as independent processes.



Autor: J. Oelgoetz, C. J. Fontes, H. L. Zhang, S. N. Nahar, A. K. Pradhan

Fuente: https://arxiv.org/







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