J/ApJ/875/129 FeI lines in NIR spectra of Arcturus & mu Leo (Kondo+, 2019)
FeI Lines in 0.91-1.33um spectra of red giants for measuring the microturbulence
and metallicities.
Kondo S., Fukue K., Matsunaga N., Ikeda Y., Taniguchi D., Kobayashi N.,
Sameshima H., Hamano S., Arai A., Kawakita H., Yasui C., Izumi N.,
Mizumoto M., Otsubo S., Takenaka K., Watase A., Asano A., Yoshikawa T.,
Tsujimoto T.
<Astrophys. J., 875, 129 (2019)>
=2019ApJ...875..129K 2019ApJ...875..129K
ADC_Keywords: Spectra, infrared; Stars, giant; Abundances
Keywords: stars: abundances; stars: individual (Arcturus, mu Leo);
stars: late-type ; techniques: spectroscopic
Abstract:
For a detailed analysis of stellar chemical abundances,
high-resolution spectra in the optical have mainly been used, while
the development of near-infrared (NIR) spectrograph has opened new
wavelength windows. Red giants have a large number of resolved
absorption lines in both the optical and NIR wavelengths, but the
characteristics of the lines in different wave passbands are not
necessarily the same. We present a selection of FeI lines in the z',
Y, and J bands (0.91-1.33µm). On the basis of two different lists
of lines in this range, the Vienna Atomic Line Database (VALD) and the
catalog published by Melendez & Barbuy in 1999 (MB99;
Cat. J/ApJS/124/527), we selected sufficiently strong lines that are
not severely blended and compiled lists with 107 FeI lines in total
(97 and 75 lines from VALD and MB99, respectively). Combining our
lists with high-resolution (λ/Δλ=28000) and high
signal-to-noise (>500) spectra taken with an NIR spectrograph,
WINERED, we present measurements of the iron abundances of two
prototype red giants: Arcturus and µ Leo. A bootstrap method for
determining the microturbulence and abundance together with their
errors is demonstrated. The standard deviations of logεFe
values from individual FeI lines are significantly smaller when we use
the lines from MB99 instead of those from VALD. With the MB99 list, we
obtained ξ=1.20±0.11km/s and logεFe=7.01±0.05dex for
Arcturus, and ξ=1.54±0.17km/s and logεFe=7.73±0.07dex
for µ Leo. These final values show better agreements with previous
values in the literature than the corresponding values we obtained
with VALD.
Description:
We observed Arcturus and µ Leo on 2013 February 23 with WINERED
(R∼28000) mounted on the Nasmyth focus of the 1.3m Araki Telescope at
Koyama Astronomical Observatory, Kyoto Sangyo University, Japan.
We also observed HIP 76267 (A1IV) as a telluric standard.
Objects:
----------------------------------------------------------
RA (ICRS) DE Designation(s)
----------------------------------------------------------
09 52 45.82 +26 00 25.0 mu Leo = * mu. Leo
14 15 39.67 +19 10 56.7 Arcturus = NAME Arcturus
----------------------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table2.dat 40 97 *List of FeI lines selected from VALD3 and abundances
table3.dat 40 75 *List of FeI lines selected from MB99 and abundances
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Note on table2.dat and table3.dat: VALD = the Vienna Atomic Line Database:
http://vald.astro.uu.se/
MB99 = Melendez & Barbuy, 1999, J/ApJS/124/527
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See also:
J/A+A/324/435 : Chemical composition of 6 K supergiants in the SMC (Hill 1997)
J/ApJS/124/527 : Oscillator strengths for lines in J&H bands (Melendez+, 1999)
J/AJ/129/1063 : Abundances of stars within 15pc of the Sun (Luck+, 2005)
J/ApJ/636/821 : Abundances of Baade's Window K giants (Fulbright+, 2006)
J/A+A/475/1003 : Stellar parameters of G and K giant stars (Hekker+, 2007)
J/A+A/465/799 : Abundances of Galactic Bulge red giants (Lecureur+, 2007)
J/A+A/465/271 : Oxygen abundances in nearby stars (Ramirez+, 2007)
J/A+A/528/A121 : Normalized spectra of 20 red giants (Bruntt,+, 2011)
J/A+A/543/A160 : Normalized spectra of 82 Kepler red giants (Thygesen+, 2012)
J/ApJ/764/78 : Oxygen abundances in nearby FGK stars (Ramirez+, 2013)
J/A+A/564/A133 : Gaia FGK benchmark stars: metallicity (Jofre+, 2014)
J/ApJ/808/16 : Cannon: a new approach to determine abundances (Ness+, 2015)
J/ApJS/221/24 : SDSS-III APOGEE H-band spectral line lists (Shetrone+, 2015)
J/A+A/587/A2 : SP_Ace derived data from stellar spectra (Boeche+, 2016)
J/AJ/151/144 : ASPCAP weights for APOGEE chemical elements (Garcia+, 2016)
http://vald.astro.uu.se/ : VALD3 home page
Byte-by-byte Description of file: table[23].dat
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Bytes Format Units Label Explanations
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1- 10 F10.4 0.1nm lambda [9117.1/13291.8] Wavelength in Angstroms
12- 17 F6.4 eV EP [2.17/6.21] Excitation potential
19- 24 F6.3 [-] loggf [-5.1/0.15] log, statistical
weight*oscillator strength
26- 30 F5.3 [-] logAFe1 [5.88/7.68]? log of iron abundance
from line, Arcturus
32 A1 --- f_logAFe1 Flag on logAFe1 (1)
34- 38 F5.3 [-] logAFe2 [6.74/8.65]? log of iron abundance
from line, µ Leo
40 A1 --- f_logAFe2 Flag on logAFe2 (1)
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Note (1): Flags on line measurements as follows:
w = Lines weaker than the limit 0.05 in depth in synthetic spectra;
b = Lines that are blended too much determined through visual inspection;
* = lines whose abundance could not be obtained or was
rejected (MPFIT failed).
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 09-Sep-2020