C.D.S. - SIMBAD4 rel 1.7 - 2020.11.29CET05:59:52

2011A&A...526A.115M - Astronomy and Astrophysics, volume 526A, 115-115 (2011/2-1)

Electron-impact excitation of h-like Cr, Mn, Fe, Co, and Ni for applications in modeling X-ray astrophysical sources.


Abstract (from CDS):

Accurate atomic data for the less abundance Fe-peak elements are required for use in X-ray astrophysical studies. We calculate high quality electron-impact excitation collision strengths and effective collision strengths for hydrogenic Cr, Mn, Fe, Co, and Ni. We use the Dirac R-matrix method, the intermediate coupling frame transformation R-matrix method, the semi-relativistic distorted-wave method and the fully-relativistic distorted-wave method to calculate collision strengths for each of the ions. The ADAS collisional-radiative codes are used to produce photon emissivity coefficients for each ion.
Result. are presented for atomic energy levels, spontaneous emission coefficients, electron-impact excitation collision strengths and associated effective collision strengths for each of the five species under consideration. We find relativistic effects can contribute an approximate 10% increase to the background cross section in relation to semi-relativistic collision calculations. We also confirm that radiation damping plays a prominent role for certain near threshold resonances. In order check the integration of our results within collisional-radiative modeling codes, we have used the ADAS package for some preliminary modeling of photon emissivities. The atomic data shall be made available online through the OPEN-ADAS site and the CFADC database

Abstract Copyright:

Journal keyword(s): atomic data - atomic processes - supernovae: general

VizieR on-line data: <Available at CDS (J/A+A/526/A115): cr_legy.dat cr_negy.dat cr_lcol.dat cr_ncol.dat mn_legy.dat mn_negy.dat mn_lcol.dat mn_ncol.dat fe_legy.dat fe_negy.dat fe_lcol.dat fe_ncol.dat co_legy.dat co_negy.dat co_ncol.dat co_lcol.dat ni_legy.dat ni_negy.dat ni_lcol.dat ni_ncol.dat pec_cr.dat pec_mn.dat pec_fe.dat pec_co.dat pec_ni.dat adas/*>

Simbad objects: 2

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Number of rows : 2

N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
1 W 49b SNR 19 11 09.000 +09 06 24.00           ~ 400 1
2 NAME Cas A SNR 23 23 24.000 +58 48 54.00           ~ 2450 1

    Equat.    Gal    SGal    Ecl

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