On the metallicity of open clusters. III. Homogenised sample

J 2016

On the metallicity of open clusters. III. Homogenised sample

NETOPIL, Martin, Ernst PAUNZEN, Ulrike HEITER a Caroline SOUBIRAN

Základní údaje

Originální název

On the metallicity of open clusters. III. Homogenised sample

Autoři

NETOPIL, Martin (40 Rakousko, garant, domácí), Ernst PAUNZEN (40 Rakousko, domácí), Ulrike HEITER (752 Švédsko) a Caroline SOUBIRAN (250 Francie)

Vydání

Astronomy and Astrophysics, 2016, 1432-0746

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10308 Astronomy

Stát vydavatele

Francie

Utajení

není předmětem státního či obchodního tajemství

Impakt faktor

Impact factor: 5.014

Kód RIV

RIV/00216224:14310/16:00087846

Organizační jednotka

Přírodovědecká fakulta

DOI

http://dx.doi.org/10.1051/0004-6361/201526370

UT WoS

000369710300157

Klíčová slova anglicky

Galaxy: abundances; Galaxy: structure; open clusters and associations :general

Štítky

AKR, rivok

Změněno: 9. 4. 2017 10:07, Ing. Andrea Mikešková

Anotace

V originále

Open clusters are known as excellent tools for various topics in Galactic research. For example, they allow accurately tracing the chemical structure of the Galactic disc. However, the metallicity is known only for a rather low percentage of the open cluster population, and these values are based on a variety of methods and data. Therefore, a large and homogeneous sample is highly desirable. In the third part of our series we compile a large sample of homogenised open cluster metallicities using a wide variety of different sources. These data and a sample of Cepheids are used to investigate the radial metallicity gradient, age effects, and to test current models. We used photometric and spectroscopic data to derive cluster metallicities. The different sources were checked and tested for possible offsets and correlations. In total, metallicities for 172 open cluster were derived. We used the spectroscopic data of 100 objects for a study of the radial metallicity distribution and the age-metallicity relation. We found a possible increase of metallicity with age, which, if confirmed, would provide observational evidence for radial migration. Although a statistical significance is given, more studies are certainly needed to exclude selection effects, for example. The comparison of open clusters and Cepheids with recent Galactic models agrees well in general. However, the models do not reproduce the flat gradient of the open clusters in the outer disc. Thus, the effect of radial migration is either underestimated in the models, or an additional mechanism is at work. Apart from the Cepheids, open clusters are the best tracers for metallicity over large Galactocentric distances in the Milky Way. For a sound statistical analysis, a sufficiently large and homogeneous sample of cluster metallicities is needed. Our compilation is currently by far the largest and provides the basis for several basic studies such as the statistical treatment of the Galactic cluster population, or evolutionary studies of individual star groups in open clusters.

Návaznosti

GP14-26115P, projekt VaV

Název: Vstříc k jednotné škále metalicity pro otevřené hvězdokupy

Investor: Grantová agentura ČR, Vstříc k jednotné škále metalicity pro otevřené hvězdokupy

3SGA5916, interní kód MU

Název: Hvězdy a hvězdokupy v Magellanových mračnech (Akronym: Webda MaC)

Investor: Jihomoravský kraj, Hvězdy a hvězdokupy v Magellanových mračnech, Granty pro zahraniční vědce

7AMB14AT015, projekt VaV

Název: Nový pohled na magnetické hvězdy (Akronym: MAGSTARS)

Investor: Ministerstvo školství, mládeže a tělovýchovy ČR, Nový pohled na magnetické hvězdy

Citovat

NETOPIL, Martin, Ernst PAUNZEN, Ulrike HEITER a Caroline SOUBIRAN. On the metallicity of open clusters. III. Homogenised sample. Astronomy and Astrophysics. 2016, roč. 585, January, s. "nestrankovano", 17 s. ISSN 1432-0746. Dostupné z: https://dx.doi.org/10.1051/0004-6361/201526370.

@article{1339252,
   author = {Netopil, Martin and Paunzen, Ernst and Heiter, Ulrike and Soubiran, Caroline},
   article_number = {January},
   doi = {http://dx.doi.org/10.1051/0004-6361/201526370},
   keywords = {Galaxy: abundances; Galaxy: structure; open clusters and associations :general},
   language = {eng},
   issn = {1432-0746},
   journal = {Astronomy and Astrophysics},
   title = {On the metallicity of open clusters. III. Homogenised sample},
   volume = {585},
   year = {2016}
}

TY  - JOUR
ID  - 1339252
AU  - Netopil, Martin - Paunzen, Ernst - Heiter, Ulrike - Soubiran, Caroline
PY  - 2016
TI  - On the metallicity of open clusters. III. Homogenised sample
JF  - Astronomy and Astrophysics
VL  - 585
IS  - January
SP  - "nestrankovano"
EP  - "nestrankovano"
SN  - 14320746
KW  - Galaxy: abundances
KW  - Galaxy: structure
KW  - open clusters and associations :general
N2  - Open clusters are known as excellent tools for various topics in Galactic research. For example, they allow accurately tracing the chemical structure of the Galactic disc. However, the metallicity is known only for a rather low percentage of the open cluster population, and these values are based on a variety of methods and data. Therefore, a large and homogeneous sample is highly desirable. In the third part of our series we compile a large sample of homogenised open cluster metallicities using a wide variety of different sources. These data and a sample of Cepheids are used to investigate the radial metallicity gradient, age effects, and to test current models. We used photometric and spectroscopic data to derive cluster metallicities. The different sources were checked and tested for possible offsets and correlations. In total, metallicities for 172 open cluster were derived. We used the spectroscopic data of 100 objects for a study of the radial metallicity distribution and the age-metallicity relation. We found a possible increase of metallicity with age, which, if confirmed, would provide observational evidence for radial migration. Although a statistical significance is given, more studies are certainly needed to exclude selection effects, for example. The comparison of open clusters and Cepheids with recent Galactic models agrees well in general. However, the models do not reproduce the flat gradient of the open clusters in the outer disc. Thus, the effect of radial migration is either underestimated in the models, or an additional mechanism is at work. Apart from the Cepheids, open clusters are the best tracers for metallicity over large Galactocentric distances in the Milky Way. For a sound statistical analysis, a sufficiently large and homogeneous sample of cluster metallicities is needed. Our compilation is currently by far the largest and provides the basis for several basic studies such as the statistical treatment of the Galactic cluster population, or evolutionary studies of individual star groups in open clusters.
ER  -

NETOPIL, Martin, Ernst PAUNZEN, Ulrike HEITER a Caroline SOUBIRAN. On the metallicity of open clusters. III. Homogenised sample. \textit{Astronomy and Astrophysics}. 2016, roč.~585, January, s.~''nestrankovano'', 17 s. ISSN~1432-0746. Dostupné z: https://dx.doi.org/10.1051/0004-6361/201526370.

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