J/MNRAS/454/1585 Mn abundances of Galactic disc stars (Mishenina+, 2015)
Mn abundances in the stars of the Galactic disc with metallicities
-1.0 < [Fe/H] < 0.3.
Mishenina T., Gorbaneva T., Pignatari M., Thielemann F.-K., Korotin S.A.
<Mon. Not. R. Astron. Soc., 454, 1585-1594 (2015)>
=2015MNRAS.454.1585M 2015MNRAS.454.1585M (SIMBAD/NED BibCode)
ADC_Keywords: Milky Way ; Stars, late-type ; Abundances
Keywords: stars: abundances - stars: late-type - Galaxy: disc -
Galaxy: evolution
Abstract:
In this work, we present and discuss the observations of the Mn
abundances for 247 FGK dwarfs, located in the Galactic disc with
metallicity -1<[Fe/H]<+0.3. The observed stars belong to the
substructures of the Galaxy thick and thin disks, and to the Hercules
stream. The observations were conducted using the 1.93m telescope at
Observatoire de Haute-Provence (OHP, France) equipped with the
echelle-type spectrographs ELODIE and SOPHIE. The abundances were
derived under the LTE approximation, with an average error for the
[Mn/Fe] ratio of 0.10dex. For most of the stars in the sample, Mn
abundances are not available in the literature. We obtain an evolution
of [Mn/Fe] ratio with the metallicity [Fe/H] consistent with previous
data compilations. In particular, within the metallicity range covered
by our stellar sample, the [Mn/Fe] ratio is increasing with the
increase of metallicity. This due to the contribution to the Galactic
chemical evolution of Mn and Fe from thermonuclear supernovae. We
confirm the baseline scenario where most of the Mn in the Galactic
disc and in the Sun is made by thermonuclear supernovae. In
particular, the effective contribution from core-collapse supernovae
to the Mn in the Solar system is about 10-20 per cent. However,
present uncertainties affecting the production of Mn and Fe in
thermonuclear supernovae are limiting the constraining power of the
observed [Mn/Fe] trend in the Galactic discs on, e.g. the frequency of
different thermonuclear supernovae populations. The different
production of these two elements in different types of thermonuclear
supernovae needs to be disentangled by the dependence of their
relative production on the metallicity of the supernova progenitor.
Description:
The investigated stellar spectra were obtained using the 1.93 m
telescope at Observatoire de Haute-Provence (OHP, France) equipped
with echelle-type spectrographs, namely SOPHIE, resolving power
R=75000 and ELODIE, R=42000, in the wavelength range
λ4400-6800Å and signal-to-noise ratio of about 100-300.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 75 247 Atmospheric parameters and Mn abundance logA(Mn)
each used line (λ, Å) and [Mn/Fe]
ratio for our target stars
table4.dat 55 22 Comparison of atmospheric parameters and Mn
abundance for common stars with
Battistini & Bensby (2015, Cat. J/A+A/577/A9)
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See also:
J/A+A/577/A9 : Sc, V, Mn, and Co in Milky Way stars (Battistini+, 2015)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Reg Region (1)
12- 21 A10 --- Star Star name or Sun
23- 26 I4 K Teff ? Effective temperature
28- 31 F4.2 [cm/s2] logg ? Surface gravity
33- 37 F5.2 [-] [Fe/H] ? Metellicity
39- 42 F4.2 km/s Vt ? Microturbulent velocity
44- 47 F4.2 [-] logA4783 ? λ4783Å abundance
49- 52 F4.2 [-] logA4823 ? λ4823Å abundance
54- 57 F4.2 [-] logA5432 ? λ5432Å abundance
59- 62 F4.2 [-] logA6013 ? λ6013Å abundance
64- 67 F4.2 [-] logA6021 ? λ6021Å abundance
69- 73 F5.2 [-] [Mn/Fe] ? [Mn/Fe] abundance
75 A1 --- BB2015 [*] * indicates stars in common with
Battistini & Bensby (2015, Cat. J/A+A/577/A9)
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Note (1): Thick disk, Thin disk, Hercules or Nonclass.
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- HIP HIP number
8- 13 I6 --- HD HD number
15- 18 I4 K TeffB Effective temperature from
Battistini & Bensby (2015, Cat. J/A+A/577/A9)
20- 22 F3.1 [cm/s2] loggB Surface gravity from
Battistini & Bensby (2015, Cat. J/A+A/577/A9)
24- 28 F5.2 [-] [Fe/H]B Abundance [Fe/H] from
Battistini & Bensby (2015, Cat. J/A+A/577/A9)
30- 34 F5.2 [-] [Mn/Fe]B ?=- Abundace [Mn/Fe] from
Battistini & Bensby (2015, Cat. J/A+A/577/A9)
36- 39 I4 K Teff Effective temperature from this paper
41- 43 F3.1 [cm/s2] logg Surface gravity from this paper
45- 49 F5.2 [-] [Fe/H] Abundance [Fe/H] from this paper
51- 55 F5.2 [-] [Mn/Fe] ?=- Abundace [Mn/Fe] from this paper
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 29-Jun-2016