J/A+A/645/A19 Arcturus Lab (line list) (Fanelli+, 2021)
Stellar population astrophysics (SPA) with the TNG. The Arcturus Lab.
Fanelli C., Origlia L., Oliva E., Mucciarelli A., Sanna N.,
Dalessandro E., Romano D.
<Astron. Astrophys. 645, A19 (2021)>
=2021A&A...645A..19F 2021A&A...645A..19F (SIMBAD/NED BibCode)
ADC_Keywords: Stars, late-type ; Spectroscopy
Keywords: techniques: spectroscopic - stars: abundances -
individual stars: Arcturus - stars: late-type
Abstract:
High-resolution spectroscopy in the near infrared (NIR) is a powerful
tool to characterise the physical and chemical properties of cool star
atmospheres. The current generation of NIR echelle spectrographs
enables the sampling of many spectral features over the full 0.9-2.4um
range for a detailed chemical tagging.
Within the Stellar Population Astrophysics Large Program at the TNG,
we used a high-resolution (R=50000) NIR spectrum of Arcturus acquired
with the GIANO-B echelle spectrograph as a laboratory to define and
calibrate an optimal line list and new diagnostic tools to derive
accurate stellar parameters and chemical abundances.
We inspected several hundreds of NIR atomic and molecular lines to
derive abundances of 26 different chemical species, including CNO,
iron-group, alpha, Z-odd and neutron-capture elements. We then
performed a similar analysis in the optical using Arcturus VLT-UVES
spectra.
By the combined NIR and optical analysis we defined a new thermometer
and a new gravitometer for giant stars, based on the comparison of
Carbon and Oxygen abundances, respectively, as derived from atomic and
molecular lines. We then derived self-consistent stellar parameters
and chemical abundances of Arcturus over the full 4800-24500Å
spectral range and we compared them with previous studies in the
literature. We finally discussed a number of problematic lines, which
can be affected by deviations from thermal equilibrium and/or
chromospheric activity, as traced by the observed variability of HeI
at 10830Å.
Description:
Table 1 and 2 list the optical and in the NIR atomic lines,
respectively, used for the chemical analysis of Arcturus.
Table 3 is a compilation of the NIR CO, OH, CN and HF molecular lines
used to get CNO and F abundances of Arcturus.
Table 4 list the 12CO and 13CO band-heads in the Arcturus spectrum.
All wavelengths are in Å and in the air.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 32 689 Optical atomic lines
tablea2.dat 32 453 NIR atomic lines
tablea3.dat 32 166 NIR molecular lines
tablea4.dat 25 13 Visible 12CO and 13CO band-heads
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Byte-by-byte Description of file: tablea1.dat tablea2.dat tablea3.dat
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Bytes Format Units Label Explanations
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1- 9 F9.3 0.1nm lambdaAir Air wavelength
12- 18 F7.2 --- Line Line identification (1)
21- 26 F6.3 --- log(gf) Oscillator strength
29- 32 F4.2 eV EP Energy potential
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Note (1): Lines are ordered by wavelengths.
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Byte-by-byte Description of file: tablea4.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- v'-v'' vibrational quantum numbers (1)
6- 12 F7.2 --- Code molecule-isotopologue identification
15- 25 A11 0.1nm Range Wavelength range in the air
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Note (1): Features are ordered by wavelengths and grouped in isotopologues.
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Acknowledgements:
Cristiano Fanelli, cristiano.fanelli3(at)unibo.it
(End) Cristiano Fanelli [INAF], Patricia Vannier [CDS] 05-Nov-2020