J/A+A/645/A106 Atomic data for the Gaia-ESO Survey (Heiter+, 2021)
Atomic data for the Gaia-ESO Survey.
Heiter U., Lind K., Bergemann M., Asplund M., Mikolaitis S., Barklem P.S.,
Masseron T., de Laverny P., Magrini L., Edvardsson B., Joensson H.,
Pickering J.C., Ryde N., Bayo Aran A., Bensby T., Casey A.R., Feltzing S.,
Jofre P., Korn A.J., Pancino E., Damiani F., Lanzafame A., Lardo C.,
Monaco L., Morbidelli L., Smiljanic R., Worley C., Zaggia S., Randich S.,
Gilmore G.F.
<Astron. Astrophys. 645, A106 (2021)>
=2021A&A...645A.106H 2021A&A...645A.106H (SIMBAD/NED BibCode)
ADC_Keywords: Surveys ; Stars, late-type ; Abundances ; Atomic physics
Keywords: atomic data - stars: abundances - stars: late-type - surveys
Abstract:
We describe the atomic data that were used for the abundance analyses
of FGK-type stars carried out within the Gaia-ESO Public Spectroscopic
Survey in the years 2012 to 2019. The Gaia-ESO survey is one among
several current and future stellar spectroscopic surveys producing
abundances for Milky-Way stars on an industrial scale.
We present an unprecedented effort to create a homogeneous common line
list, which was used by several abundance analysis groups using
different radiative transfer codes to calculate synthetic spectra and
equivalent widths. The atomic data are accompanied by quality
indicators and detailed references to the sources. An overview of
molecular data is also given.
Among a subset of over 1300 lines of 35 elements in the wavelength
ranges from 475nm to 685nm and from 850nm to 895nm we identified
about 200 lines of 24 species which have accurate gf-values and are
free of blends in the spectra of the Sun and Arcturus.
Description:
In general experimental transition probabilities were preferred but
theoretical values were also used. Astrophysical gf-values were
avoided due to the model-dependence of such a procedure. Synthetic
stellar spectra calculated for the Sun and Arcturus were used to
assess the blending properties of the lines. We also performed a
detailed investigation of available data for line broadening due to
collisions with neutral hydrogen atoms, which are included in the data
table as "Van der Waals broadening".
The atomic data are stored in a single table with one record for each
transition. Hyperfine structure (HFS) components and different
isotopes are included as separate transitions, where applicable. HFS
components belonging to the same fine structure transition can be
identified by having the exact same label and J value for both the
lower and the upper levels. Both the preselected lines and the
background line list are included. Preselected lines can be identified
by having both non-empty (not '-') gf_flag and synflag entries. The
set of molecular data is stored in a separate table.
We strongly encourage users of the Gaia-ESO line list to cite, in
addition to the overview article, the individual sources for the
atomic and molecular data used in a particular work. It is important
that providers of atomic data receive credit for their work by citing
the original publications. This is also a prerequisite for the
continued funding of this type of research. To facilitate citations of
original sources we provide, together with the data table, a BibTeX
file with the relevant entries.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
geslines.dat 362 80612 Atomic data
gesmol.dat 90 15528593 Molecular data
refs.dat 218 327 References
ges_refs.bib 751 4224 References as bib file
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Byte-by-byte Description of file: geslines.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- Element Element symbol (e.g., Fe)
4 I1 --- Ion [1/3] Ionisation stage (1)
6- 8 I3 --- Isotope Isotope information (2)
10- 18 F9.4 0.1nm lambda Wavelength in air
20- 27 A8 --- r_lambda Reference code for lambda (3)
29- 35 F7.3 [-] loggf Adopted log(gf) value
37- 41 F5.3 [-] e_loggf ?=0.000 Uncertainty in loggf
43- 82 A40 --- r_loggf Reference code for loggf
84 A1 --- gfflag [YUN-] Relative quality of loggf (4)
86 A1 --- synflag [YUN-] Blending quality (5)
88-179 A92 --- Labellow Label for lower energy level (6)
181-184 F4.1 --- Jlow Lower level J value (7)
186-191 F6.3 eV Elow Lower level energy
193-200 A8 --- r_Elow Reference code for Elow
202-293 A92 --- Labelup Label for upper energy level (6)
295-298 F4.1 --- Jup Upper level J value (7)
300-305 F6.3 eV Eup Upper level energy
307-314 A8 --- r_Eup Reference code for Eup
316-320 F5.2 [rad/s] Rad-damp []?=0.000 Radiative damping width
322-329 A8 --- r_Rad-damp Reference code for Rad-damp
331-335 F5.2 [rad/s.cm3] Sta-damp ?=0.000 Stark broadening width (8)
337-344 A8 --- r_Sta-damp Reference code for Sta-damp
346-353 F8.3 --- Vdw-damp ?=0.000 Van der Waals broadening (9)
355-362 A8 --- r_Vdw-damp Reference code for Vdw-damp
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Note (1): Ionisation stage as follows:
1 = neutral
2 = singly ionised
3 = doubly ionised
Note (2): 0 if only one isotope is present, baryon number otherwise.
Note (3): The reference code may contain several labels, combined
with + or |. When the labels are combined with + then loggf is the
average from more than one source, while | means that relative gf-values
from the first source were re-normalised to an absolute scale using accurate
lifetime measurements from the second source.
Note (4): Usage recommendation for preselected lines only as follows:
Y = Yes
U = Undecided
N = No
- = (not evaluated) for background lines.
Note (5): Usage recommendation for spectral line based on spectra of the Sun
and Arcturus for preselected lines only as follows:
Y = Yes
U = Undecided
N = No
- = (not evaluated) for background lines.
Note (6): Electronic configuration and term designation from VALD database.
Note (7): Total angular momentum quantum number.
Note (8): Logarithm of broadening width per unit perturber number density
at 10000K.
Note (9): Values greater than zero were obtained from ABO theory and are
expressed in a packed notation where the integer component is the
broadening cross-section, sigma, in atomic units, and the decimal component
is the dimensionless velocity parameter, alpha. Values less than zero are
the logarithm of the broadening width per unit perturber number density
at 10000K in units of rad/s.cm3.
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Byte-by-byte Description of file: gesmol.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- Element1 Element symbol atom 1 (e.g., C)
4 A1 --- Element2 Element symbol atom 2 (e.g., H)
6- 7 I2 --- Isotope1 Isotope information atom 1 (1)
9- 10 I2 --- Isotope2 Isotope information atom 2 (1)
12- 19 F8.3 0.1nm lambda Wavelength in air
21- 27 F7.3 [-] loggf Adopted log(gf) value
29- 33 F5.3 eV Elow Lower level energy
35- 39 F5.3 eV Eup Upper level energy
41- 46 F6.3 [rad/s] Rad-damp ?=0.00 Radiative damping width
48 A1 --- Statelow Lower level electronic state symbol
50 A1 --- Stateup Upper level electronic state symbol
52- 53 I2 --- vlow Lower level vibrational quantum number
55- 56 I2 --- vup Upper level vibrational quantum number
58- 68 A11 --- Branch Label for branch (2)
70- 90 A21 --- r_mol Reference code, in refs.dat file
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Note (1): Baryon number.
Note (2): Label for branch, a string of characters in most cases consisting of
the branch designation (e.g. P, Q, R), the spin components (1, 2, ...),
the rotationless parity (e or f) whenever lambda doubling has been computed,
and in parentheses the total angular momentum quantum number (J) for the
lower level. For further explanations we refer to the references for the
sources of molecular data.
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 19 A19 --- Ref Reference code
21- 53 A33 --- Aut Author's name
55- 73 A19 --- BibCode BibCode
75-218 A144 --- Com Comments
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Acknowledgements:
Ulrike Heiter, ulrike.heiter(at)physics.uu.se
(End) Patricia Vannier [CDS] 23-Oct-2020