Chemical analysis of K giants in the young open cluster NGC2345

N. Holanda, C.B. Pereira, N.A. Drake

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Abstract

We present results for the elemental abundances of five K giants of the young open cluster NGC 2345. The atmospheric parameters of the studied giants and their chemical abundances were determined using high-resolution optical spectroscopy. In this study, we determine abundances of light elements (Li, C, N), light odd-Z elements (Na, Al), α-elements (Mg, Si, Ca, Ti), Fe-group elements (Cr, Fe, Ni), and n-capture elements (Y, Zr, La, Ce, Nd, Sm, Eu) for each star. Abundances of the light elements and Eu were obtained using spectral synthesis technique. Also, rotation velocities were determined through the spectral synthesis of the Fe I line at 6151.6 Å. The mean metallicity obtained for the open cluster is [Fe/H] = -0.33 ± 0.05 and it is considered low compared to recent studies for open clusters in the Milky Way, although low for its Galactic latitude (b = -02.31°). Lastly, the abundance analysis shows that there is good agreement with the profile of field clump stars with the same metallicity.
Original languageEnglish
Pages (from-to)5275-5289
JournalMonthly Notices of the Royal Astronomical Society
Volume482
Issue number4
Early online date3 Nov 2018
DOIs
Publication statusPublished - 1 Feb 2019

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open clusters
chemical analysis
light elements
metallicity
stars
clumps
synthesis
spectroscopy
young
high resolution
profiles

Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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@article{9598c999cb364f12a8d85a22255c9a4c,
title = "Chemical analysis of K giants in the young open cluster NGC2345",
abstract = "We present results for the elemental abundances of five K giants of the young open cluster NGC 2345. The atmospheric parameters of the studied giants and their chemical abundances were determined using high-resolution optical spectroscopy. In this study, we determine abundances of light elements (Li, C, N), light odd-Z elements (Na, Al), α-elements (Mg, Si, Ca, Ti), Fe-group elements (Cr, Fe, Ni), and n-capture elements (Y, Zr, La, Ce, Nd, Sm, Eu) for each star. Abundances of the light elements and Eu were obtained using spectral synthesis technique. Also, rotation velocities were determined through the spectral synthesis of the Fe I line at 6151.6 {\AA}. The mean metallicity obtained for the open cluster is [Fe/H] = -0.33 ± 0.05 and it is considered low compared to recent studies for open clusters in the Milky Way, although low for its Galactic latitude (b = -02.31°). Lastly, the abundance analysis shows that there is good agreement with the profile of field clump stars with the same metallicity.",
keywords = "звезды, химическое содержание звезд, фундаментальные параметры звезд, рассеянные скопления и ассоциации, NGC 2345, Associations: individual: NGC 2345, Open clusters, Stars: abundances, Stars: fundamental parameters",
author = "N. Holanda and C.B. Pereira and N.A. Drake",
year = "2019",
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day = "1",
doi = "10.1093/mnras/sty2991",
language = "English",
volume = "482",
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Chemical analysis of K giants in the young open cluster NGC2345. / Holanda, N.; Pereira, C.B.; Drake, N.A.

In: Monthly Notices of the Royal Astronomical Society, Vol. 482, No. 4, 01.02.2019, p. 5275-5289.

Research output

TY - JOUR

T1 - Chemical analysis of K giants in the young open cluster NGC2345

AU - Holanda, N.

AU - Pereira, C.B.

AU - Drake, N.A.

PY - 2019/2/1

Y1 - 2019/2/1

N2 - We present results for the elemental abundances of five K giants of the young open cluster NGC 2345. The atmospheric parameters of the studied giants and their chemical abundances were determined using high-resolution optical spectroscopy. In this study, we determine abundances of light elements (Li, C, N), light odd-Z elements (Na, Al), α-elements (Mg, Si, Ca, Ti), Fe-group elements (Cr, Fe, Ni), and n-capture elements (Y, Zr, La, Ce, Nd, Sm, Eu) for each star. Abundances of the light elements and Eu were obtained using spectral synthesis technique. Also, rotation velocities were determined through the spectral synthesis of the Fe I line at 6151.6 Å. The mean metallicity obtained for the open cluster is [Fe/H] = -0.33 ± 0.05 and it is considered low compared to recent studies for open clusters in the Milky Way, although low for its Galactic latitude (b = -02.31°). Lastly, the abundance analysis shows that there is good agreement with the profile of field clump stars with the same metallicity.

AB - We present results for the elemental abundances of five K giants of the young open cluster NGC 2345. The atmospheric parameters of the studied giants and their chemical abundances were determined using high-resolution optical spectroscopy. In this study, we determine abundances of light elements (Li, C, N), light odd-Z elements (Na, Al), α-elements (Mg, Si, Ca, Ti), Fe-group elements (Cr, Fe, Ni), and n-capture elements (Y, Zr, La, Ce, Nd, Sm, Eu) for each star. Abundances of the light elements and Eu were obtained using spectral synthesis technique. Also, rotation velocities were determined through the spectral synthesis of the Fe I line at 6151.6 Å. The mean metallicity obtained for the open cluster is [Fe/H] = -0.33 ± 0.05 and it is considered low compared to recent studies for open clusters in the Milky Way, although low for its Galactic latitude (b = -02.31°). Lastly, the abundance analysis shows that there is good agreement with the profile of field clump stars with the same metallicity.

KW - звезды

KW - химическое содержание звезд

KW - фундаментальные параметры звезд

KW - рассеянные скопления и ассоциации

KW - NGC 2345

KW - Associations: individual: NGC 2345

KW - Open clusters

KW - Stars: abundances

KW - Stars: fundamental parameters

UR - http://adsabs.harvard.edu/abs/2019MNRAS.482.5275H

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