J/MNRAS/533/395 Nearby main-sequence stars abundances (Lopez-Valdivia+, 2024)
Atmospheric parameters and chemical abundances within 100 pc:
a sample of G, K, and M main-sequence stars.
Lopez-Valdivia R., Adame L., Zagala Lagunas E., Roman-Zuniga C.G.,
Hernandez J., Sanchez E., Fernandez-Trincado J.G., Carigi L., Kounkel M.,
Lane R.R., Stassun K.G., Villanova S.
<Mon. Not. R. Astron. Soc. 533, 395-412 (2024)>
=2024MNRAS.533..395L 2024MNRAS.533..395L (SIMBAD/NED BibCode)
ADC_Keywords: Stars, fundamental ; Stars, dwarfs ; Abundances ; Infrared ;
Rotational velocities ; Stars, nearby
Keywords: stars: abundances - stars: fundamental parameters -
stars: solar-type - techniques: spectroscopic
Abstract:
To date, we have access to enormous inventories of stellar spectra
that allow the extraction of atmospheric parameters and chemical
abundances essential in stellar studies. However, characterizing such
a large amount of data is complex and requires a good understanding of
the studied object to ensure reliable and homogeneous results. In this
study, we present a methodology to measure homogeneously the basic
atmospheric parameters and detailed chemical abundances of over 1600
thin disk main-sequence stars in the 100pc solar neighborhood, using
APOGEE-2 infrared spectra. We employed the code tonalli to determine
the atmospheric parameters using a prior on log g. The log g prior in
tonalli implies an understanding of the treated population and helps
to find physically coherent answers. Our atmospheric parameters agree
within the typical uncertainties (100K in Teff, 0.15dex in logg and
[M/H]) with previous estimations of ASPCAP and Gaia DR3. We use our
temperatures to determine a new infrared color-temperature sequence,
in good agreement with previous works, that can be used for any
main-sequence star. Additionally, we used the BACCHUS code to
determine the abundances of Mg, Al, Si, Ca, and Fe in our sample. The
five elements (Mg, Al, Si, Ca, Fe) studied have an abundance
distribution centered around slightly sub-solar values, in agreement
with previous results for the solar neighborhood. The over 1600
main-sequence stars' atmospheric parameters and chemical abundances
presented here are useful in follow-up studies of the solar
neighborhood or as a training set for data-driven methods.
Description:
This catalog presents the atmospheric parameters and chemical
abundances of over 1600 G, K, and M thin disk main-sequence stars.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table5.dat 208 1653 Stellar parameters and chemical abundances
determined in this work
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See also:
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 18 A18 --- Name 2MASS identification number
20- 29 F10.6 deg RAdeg Right ascension (J2000)
31- 40 F10.6 deg DEdeg Declination (J2000)
42- 45 I4 K Teff25 Effective temperature at 25 percentile
47- 50 I4 K Teff50 Effective temperature at 50 percentile
52- 55 I4 K Teff75 Effective temperature at 75 percentile
57- 60 F4.2 [cm/s2] logg25 Surface gravity at 25 percentile
62- 65 F4.2 [cm/s2] logg50 Surface gravity at 50 percentile
67- 70 F4.2 [cm/s2] logg75 Surface gravity at 75 percentile
72- 76 F5.2 --- [M/H]25 Overall metallicity at 25 percentile
78- 82 F5.2 --- [M/H]50 Overall metallicity at 50 percentile
84- 88 F5.2 --- [M/H]75 Overall metallicity at 75 percentile
90- 94 F5.2 --- a25 alpha elements enhancement at 25 percentile
96-100 F5.2 --- a50 alpha elements enhancement at 50 percentile
102-106 F5.2 --- a75 alpha elements enhancement at 75 percentile
108-111 F4.1 km/s v25 Projected rotational velocity at 25 percentile
113-116 F4.1 km/s v50 Projected rotational velocity at 50 percentile
118-121 F4.1 km/s v75 Projected rotational velocity at 75 percentile
123-127 F5.2 --- Mg ? Mg abundance
129-133 F5.2 --- e_Mg ? Error on Mg abundance
135-138 F4.1 --- o_Mg ? Number of lines used in
abundance determination
140-144 F5.2 --- Al ? Al abundance
146-150 F5.2 --- e_Al ? Error on Al abundance
152-155 F4.1 --- o_Al ? Number of lines used in
abundance determination
157-161 F5.2 --- Si ? Si abundance
163-167 F5.2 --- e_Si ? Error on Si abundance
169-173 F5.1 --- o_Si ? Number of lines used in
abundance determination
175-179 F5.2 --- Ca ? Ca abundance
181-185 F5.2 --- e_Ca ? Error on Ca abundance
187-190 F4.1 --- o_Ca ? Number of lines used in
abundance determination
192-196 F5.2 --- Fe ? Fe abundance
198-202 F5.2 --- e_Fe ? Error on Fe abundance
204-208 F5.1 --- o_Fe ? Number of lines used in
abundance determination
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Acknowledgements:
Ricardo Lopez-Valdivia, rlopezv(at)astro.unam.mx
(End) Patricia Vannier [CDS] 25-Jul-2024