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J/A+A/520/A57     New FeII energy levels from stellar spectra  (Castelli+, 2010)

New Fe II energy levels from stellar spectra. Castelli F., Kurucz R.L. <Astron. Astrophys. 520, A57 (2010)> =2010A&A...520A..57C
ADC_Keywords: Atomic physics ; Line Profiles ; Models, atmosphere ; Spectroscopy ; Stars, peculiar Keywords: line: identification - atomic data - stars: atmospheres - stars: chemically peculiar - stars: individual: HR 6000 Abstract: The spectra of B-type and early A-type stars show numerous unidentified lines in the whole optical range, especially in the 5100-5400Å interval. Because FeII transitions to high energy levels should be observed in this region, we used semiempirical predicted wavelengths and gf-values of FeII to identify unknown lines. Semiempirical line data for FeII computed by Kurucz are used to synthesize the spectrum of the slow-rotating, Fe - overabundant CP star HR6000. Description: FeII lines in the 3800-8000Å region, produced by transitions to the FeII subconfigurations (3P)4f, (3H)4f, (3F)4f, and (3G)4f are given in Tables 6, 7, 8, and 9, respectively. Only lines with loggf≥-1.5 are listed. Most of these lines can be observed in the UVES spectrum of HR 6000 and have allowed us to identify more than 50% of the previously unidentified lines (Castelli & Hubrig, 2007A&A...475.1041C). Objects: ----------------------------------------------- RA (2000) DE Designation(s) ----------------------------------------------- 16 08 34.563 -39 05 34.28 HD 144667 = HR 6000 ----------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table6.dat 128 99 FeII lines in the 3800-8000Å region with loggf≥-1.5 and 3d6(3P)4f energy levels as upper levels table7.dat 128 488 FeII lines in the 3800-8000Å region with loggf≥-1.5 and 3d6(3H)4f energy levels as upper levels table8.dat 128 372 FeII lines in the 3800-8000Å region with loggf≥-1.5 and 3d6(3F)4f energy levels as upper levels table9.dat 128 261 FeII lines in the 3800-8000Å region with loggf≥-1.5 and 3d6(3G)4f energy levels as upper levels
See also: J/A+AS/102/607 : Stark widths of FeII lines (Puric+ 1993) J/A+A/293/953 : IRON project VI. FeII collision strengths (Zhang+, 1995) J/A+A/293/967 : IRON Project VII. FeII radiative transitions (Nahar, 1995) J/A+A/475/765 : Fine structure forbidden lines in FeII (Ramsbottom+, 2007) Byte-by-byte Description of file: table?.dat
Bytes Format Units Label Explanations
1- 10 F10.3 cm-1 EU Upper level energy 12- 19 A8 --- LevelU Upper level 21- 24 A4 ---- NameU Upper level designation (N[N]) 26- 29 A4 --- JU Upper level J value 31- 40 F10.3 cm-1 EL Lower level energy 42- 62 A21 --- ConfL Lower level configuration 64- 71 F8.3 0.1nm lambdaC Calculated wavelength 73- 78 F6.3 --- loggf Oscillator strength 80- 87 F8.3 0.1nm lambdaO ? Observed wavelength 88 A1 --- u_lambdaO [?] Uncertainty flag on lambdaO 90-128 A39 --- Notes Notes
Acknowledgements: Fiorella Castelli, castelli(at)oats.inaf.it
(End) Patricia Vannier [CDS] 08-Jul-2010
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