J/ApJ/808/174 FeII radiative transition rates (Bautista+, 2015)
Atomic data and spectral model for Fe II.
Bautista M.A., Fivet V., Ballance C., Quinet P., Ferland G., Mendoza C.,
Kallman T.R.
<Astrophys. J., 808, 174 (2015)>
=2015ApJ...808..174B 2015ApJ...808..174B (SIMBAD/NED BibCode)
ADC_Keywords: Atomic physics
Keywords: atomic data; atomic processes; ISM: abundances; line: formation;
stars: massive; stars: variables: T Tauri, Herbig Ae/Be
Abstract:
We present extensive calculations of radiative transition rates and
electron impact collision strengths for FeII. The data sets involve 52
levels from the 3d7, 3d64s, and 3d54s2 configurations.
Computations of A-values are carried out with a combination of
state-of-the-art multiconfiguration approaches, namely the
relativistic Hartree-Fock, Thomas-Fermi-Dirac potential, and
Dirac-Fock methods, while the R-matrix plus intermediate coupling
frame transformation, Breit-Pauli R-matrix, and Dirac R-matrix
packages are used to obtain collision strengths. We examine the
advantages and shortcomings of each of these methods, and estimate
rate uncertainties from the resulting data dispersion. We proceed to
construct excitation balance spectral models, and compare the
predictions from each data set with observed spectra from various
astronomical objects. We are thus able to establish benchmarks in the
spectral modeling of [FeII] emission in the IR and optical regions as
well as in the UV FeII absorption spectra. Finally, we provide
diagnostic line ratios and line emissivities for emission spectroscopy
as well as column densities for absorption spectroscopy.
Description:
One hundred thirty-seven [FeII] lines are found in the Hubble Space
Telescope (HST)/STIS archived spectra of the Weigelt blobs of η
Carinae. 55 [FeII] lines have been measured in the X-shooter
(3000-25000Å) spectrum of the jet of the pre-main-sequence star
SEO-Hα 574 (Giannini et al. 2013ApJ...778...71G 2013ApJ...778...71G).
See sections 3 and 5.
Objects:
-----------------------------------------------------------
RA (ICRS) DE Designation(s)
-----------------------------------------------------------
10 45 03.55 -59 41 04.0 eta Carinae = * eta Car
11 16 02.88 -76 24 53.3 ESO-Hα 574 = ESO-HA 574
-----------------------------------------------------------
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table3.dat 38 52 Energy Levels of the 3d64s, 3d7, and
3d54s2 configurations
table10.dat 33 473 Fe II line branching ratios
table11.dat 60 106 *Intensity ratios from lines from the same upper
level in η Carinea
table12.dat 62 1953 Maxwellian averaged collision strengths for FeII
vs temperature
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Note on table11.dat: Comparison between calculated and observed ratios in
the Weigelt blobs of η Carinea and the ESO-Hα574.
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See also:
J/A+A/554/A132 : Iron line list (FeI and FeII) (Genovali+, 2013)
J/A+A/536/A74 : FeII forbidden lines radiative transition rates (Deb+, 2011)
J/A+A/520/A57 : New FeII energy levels from stellar spectra (Castelli+, 2010)
J/ApJ/709/611 : The multi-component absorber QSO 0318-0600 (Dunn+, 2010)
J/A+A/508/1527 : SiII Radiative transition rates (Bautista+, 2009)
J/MNRAS/395/855 : Spectroscopy (310-1040nm) of HH 202 (Mesa-Delgado+, 2009)
J/A+A/475/765 : Fine structure forbidden lines in FeII (Ramsbottom+, 2007)
J/A+AS/120/361 : IRON Project. XIX. Fe II radiative transitions (Quinet+ 1996)
J/A+A/293/953 : IRON project VI. FeII collision strengths (Zhang+, 1995)
http://etacar.umn.edu/ : HST Treasury program on eta Carinae
Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 --- Seq [1/52] Index number
4- 17 A14 --- Conf Configuration
19- 28 A10 --- Lev Level
30- 38 F9.7 --- E [0/0.3] Energy (1)
--------------------------------------------------------------------------------
Note (1): From Ralchenko Y., Kramida A., Reader J. and NIST ASD Team 2011
NIST Atomic Spectra Database (version 4.1):
http://www.nist.gov/pml/data/asd.cfm
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Byte-by-byte Description of file: table10.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 --- Up [2/52] Upper level designation
4- 5 I2 --- Low [1/47] Lower level designation
7- 15 F9.2 0.1nm lambda [3175.3/873582.2] Line wavelength; Angstroms
17- 24 E8.3 --- BR Branching ratio
26- 33 E8.3 --- e_BR [0/0.3] Uncertainty in BR
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Byte-by-byte Description of file: table11.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 --- Up [10/51] Upper level 1 designation
4- 5 I2 --- Low1 [1/14] Lower level numerator designation
7- 8 I2 --- Low2 [2/16] Lower level denominator designation
10- 16 F7.1 0.1nm lambda1 [3277.8/17971] Numerator wavelength
18- 24 F7.1 0.1nm lambda2 [4080.4/18094] Denominator wavelength
26- 33 E8.2 --- Obs [0.6/116] Observed ratio
35- 42 E8.2 % e_Obs [0.01/70.5] Uncertainty in Obs
44- 51 E8.2 --- Th [0.009/72] Theoretical ratio
53- 60 E8.2 % e_Th [0.0003/8.5] Uncertainty in Th
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Byte-by-byte Description of file: table12.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Low [1/62] Lower level designation (1)
4- 5 I2 --- Up [2/63] Upper level designation (1)
7- 15 E9.3 --- CS5 [0/10.5] Effective collision strength at 5000K
17- 25 E9.3 --- CS7 [0/10.2] Effective collision strength at 7000K
27- 35 E9.3 --- CS10 [0/9.8] Effective collision strength at 10000K
37- 45 E9.3 --- CS15 [0/9.3] Effective collision strength at 15000K
47- 55 E9.3 --- CS20 [0/8.8] Effective collision strength at 20000K
57- 62 F6.2 % e_CS10 [3.4/256] Uncertainty in CS10
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Note (1): According to author, levels 53-62 should be disregarded due to a
lower level of confidence in the calculation (note added by CDS).
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Acknowledgements:
Manuel Bautista [Western Michigan University]
History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 02-Dec-2015