J/A+A/585/A143 NIR spectroscopy of the Sun and HD20010 (Andreasen+, 2016)
Near-infrared spectroscopy of the Sun and HD20010.
Compiling a new linelist in the NIR.
Andreasen D.T., Sousa S.G., Delgado Mena E., Santos N.C., Tsantaki M.,
Rojas-Ayala B., Neves V.
<Astron. Astrophys. 585, A143 (2016)>
=2016A&A...585A.143A 2016A&A...585A.143A (SIMBAD/NED BibCode)
ADC_Keywords: Sun ; Spectroscopy ; Equivalent widths
Keywords: Sun: atmosphere - stars: solar-type - techniques: spectroscopic -
stars: fundamental parameters - stars individual: HD 20010
Abstract:
Effective temperature, surface gravity, and metallicity are basic
spectroscopic stellar parameters necessary to characterize a star or a
planetary system. Reliable atmospheric parameters for FGK stars have
been obtained mostly from methods that rely on high resolution and
high signal-to-noise optical spectroscopy. The advent of a new
generation of high resolution near-infrared (NIR) spectrographs opens
the possibility of using classic spectroscopic methods with high
resolution and high signal-to-noise in the NIR spectral window.
We compile a new iron line list in the NIR from a solar spectrum to
derive precise stellar atmospheric parameters, comparable to the ones
already obtained from high resolution optical spectra. The spectral
range covers 10000Å to 25000Å, which is equivalent to the Y,J,H,
and K-bands.
Our spectroscopic analysis is based on the iron excitation and
ionization balance done in local thermodynamic equilibrium. We use a
high resolution and high signal-to-noise ratio spectrum of the Sun
from the Kitt Peak telescope as a starting point to compile the iron
line list. The oscillator strengths (loggf) of the iron lines were
calibrated for the Sun. The abundance analysis was done using the MOOG
code after measuring equivalent widths of 357 solar iron lines.
Description:
We aim to compile a new iron line list in the NIR from a solar
spectrum to derive precise stellar atmospheric parameters, comparable
to the ones already obtained from high resolution optical spectra. The
spectral range covers the Y, J, H, and K bands.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 32 326 FeI and FeII line list
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 9 F9.3 0.1nm lambda Wavelength
11- 14 F4.1 --- Element Element, 26.0=FeI, 26.1=FeII
16- 19 F4.2 eV EP Excitation potential
21- 26 F6.3 --- loggf Oscillator strength
28- 32 F5.1 0.1pm EW Equivalent width
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Acknowledgements:
Daniel T. Andreasen, daniel.andreasen(at)astro.up.pt
(End) Patricia Vannier [CDS] 12-Nov-2015