J/ApJ/740/L52 FeIX energy levels (Foster+, 2011)
Fe IX calculations for the solar dynamics observatory.
Foster A.R., Testa P.
<Astrophys. J., 740, L52 (2011)>
=2011ApJ...740L..52F 2011ApJ...740L..52F
ADC_Keywords: Atomic physics
Keywords: atomic data - Sun: UV radiation
Abstract:
New calculations of the energy levels, radiative transition rates, and
collisional excitation rates of Fe IX have been carried out using the
Flexible Atomic Code (FAC; Gu 2003ApJ...582.1241G 2003ApJ...582.1241G), paying close
attention to experimentally identified levels and extending existing
calculations to higher energy levels. For lower levels, R-matrix
collisional excitation rates from earlier work have been used.
Significant emission is predicted by these calculations in the 5f-3d
transitions, which will impact analysis of Solar Dynamics Observatory
Atmospheric Imaging Assembly (SDO/AIA) observations using the 94Å
filter.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table2.dat 114 1494 The list of energy levels resulting from this work
--------------------------------------------------------------------------------
See also:
J/ApJS/164/297 : New relativistic atomic data for Fe IX (Verma+, 2006)
J/A+A/460/331 : Fe IX radiative and excitation rates (Aggarwal+, 2006)
J/A+A/410/359 : Radiative and Auger decay for Fe II-Fe IX (Palmeri+, 2003)
J/A+A/394/753 : IRON Project. LI. (Storey+, 2002)
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 I4 --- Seq [1/1494] Index number
6- 81 A76 --- Conf The jj Symbol
83- 89 F7.3 eV EFac [0/244.259] Original FAC calculation results
(Flexible Atomic Code: Gu 2003ApJ...582.1241G 2003ApJ...582.1241G)
91- 97 F7.3 eV Ecorr [0/239.75] Energy after correction; see text
99-100 I2 --- Ind [0/41]? Index of the level in Figure 1 (1)
102-108 F7.3 eV EG [0/170.847]? GRASP results of Aggarwal et al.
2006, Cat. J/A+A/460/331
110-112 I3 --- IndG [1/360]? Energy order of A06 (2)
114 A1 --- f_IndG [*] Disagreement between configurations (2)
--------------------------------------------------------------------------------
Note (1): For these levels Ecorr=Eobserved. See section 2.
Note (2):
* = A level for which a different configuration is found between our
work and Aggarwal et al. (A06; 2006, Cat. J/A+A/460/331).
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 13-Feb-2013