2014A&A...566A.105W


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.08CEST03:09:49

2014A&A...566A.105W - Astronomy and Astrophysics, volume 566A, 105-105 (2014/6-1)

K-shell energy levels and radiative rates for transitions in Si IX.

WEI H.G., SHI J.R., WANG F.L., ZHONG J.Y., LIANG G.Y. and ZHAO G.

Abstract (from CDS):

Accurate atomic data are needed to analyze the SiIX K-shell features in astrophysical X-ray spectra. Relative large discrepancies in the existing atomic data have impeded this progress. We present the accurate SiIX K-shell transition data, including K-shell energy levels, wavelengths, radiative rates, and oscillator strengths. The flexible atomic code (FAC), which is a fully relativistic atomic code with configuration interaction (CI) included, was employed to calculate these data. To investigate the CI effects, calculations with different configurations included were carried out. The K-shell atomic data of SiIX transitions between 1s22s22p2, 1s22s2p3, 1s22p4, 1s2s22p3, 1s2s2p4, and 1s2p5 are reported. The accuracy of our data is demonstrated by comparing them with the available experimental measurements and theoretical calculations. The energy levels are accurate to 3.5 eV, the wavelengths to within 15 mÅ. For most transitions, the radiative rates an accuracy of 20%. The effects of CI from high-energy configurations were investigated as well.

Abstract Copyright:

Journal keyword(s): atomic data - atomic processes

VizieR on-line data: <Available at CDS (J/A+A/566/A105): table3.dat table4.dat>

Simbad objects: 4

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Number of rows : 4

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NGC 3783 Sy1 11 39 01.7095761008 -37 44 19.008597647   12.46 13.43 11.33 12.1 ~ 1486 0
2 IC 4271 Sy2 13 29 21.441 +37 24 50.45   15.6       ~ 120 1
3 HD 226868 HXB 19 58 21.6758193269 +35 12 05.782512305 9.38 9.72 8.91 8.42   O9.7Iabpvar 3923 0
4 NAME MR 2251-178 Sy1 22 54 05.8858021308 -17 34 55.403006841   14.99 14.36 15.12   ~ 374 3

    Equat.    Gal    SGal    Ecl

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2020.07.08-03:09:49

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