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@article{1576497,
author = {Yontan, Talar and Bilir, Selcuk and Bostanci, Zahide and Ak, Tansel and Ak, Serap and Guver, Tolga and Paunzen, Ernst and Urgup, Hakan and Celebi, Muslim and Akti, B. and Gokmen, Sibel},
article_location = {DORDRECHT},
article_number = {9},
doi = {http://dx.doi.org/10.1007/s10509-019-3640-y},
keywords = {Galaxy; open cluster and associations; Individual; ASCC 115; Collinder 421; NGC 6793; NGC 7031; NGC 7039; NGC 7086; Roslund 1 and Stock 21; Galaxy; Disc stars; Hertzsprung-Russell (HR) diagram},
language = {eng},
issn = {0004-640X},
journal = {Astrophysics and Space Science},
title = {CCD UBV photometric and Gaia astrometric study of eight open clusters-ASCC 115, Collinder 421, NGC 6793, NGC 7031, NGC 7039, NGC 7086, Roslund 1 and Stock 21},
url = {https://link.springer.com/article/10.1007/s10509-019-3640-y},
volume = {364},
year = {2019}
}
TY - JOUR
ID - 1576497
AU - Yontan, Talar - Bilir, Selcuk - Bostanci, Zahide - Ak, Tansel - Ak, Serap - Guver, Tolga - Paunzen, Ernst - Urgup, Hakan - Celebi, Muslim - Akti, B. - Gokmen, Sibel
PY - 2019
TI - CCD UBV photometric and Gaia astrometric study of eight open clusters-ASCC 115, Collinder 421, NGC 6793, NGC 7031, NGC 7039, NGC 7086, Roslund 1 and Stock 21
JF - Astrophysics and Space Science
VL - 364
IS - 9
SP - 1-20
EP - 1-20
PB - Springer
SN - 0004640X
KW - Galaxy
KW - open cluster and associations
KW - Individual
KW - ASCC 115
KW - Collinder 421
KW - NGC 6793
KW - NGC 7031
KW - NGC 7039
KW - NGC 7086
KW - Roslund 1 and Stock 21
KW - Galaxy
KW - Disc stars
KW - Hertzsprung-Russell (HR) diagram
UR - https://link.springer.com/article/10.1007/s10509-019-3640-y
L2 - https://link.springer.com/article/10.1007/s10509-019-3640-y
N2 - In this study, we carried out CCD UBV photometry of eight open clusters, ASCC 115, Collinder 421, NGC 6793, NGC 7031, NGC 7039, NGC 7086, Roslund 1, Stock 21, and determined their reddening, metallicity, distance, age, and mass functions. We used new Gaia Data Release 2 (DR2) astrometric data to separate cluster member stars from the field stars and obtain precise structural and astrophysical parameters. To identify cluster member stars we utilized an unsupervised membership assignment code (UPMASK), which is based on the photometric and astrometric data. The density distributions for the open clusters show good fits with the empirical King model except for Roslund 1 and Stock 21 not having central concentration. The colour excesses and metallicities were derived separately using U-BxB-V two-colour diagrams. Keeping these parameters as constants, we simultaneously calculated distance moduli and ages of the clusters from VxB-V and VxU-Bcolour-magnitude diagrams using PARSEC theoretical isochrones. Taking into account Gaia DR2 proper motion components and parallaxes of the member stars, we also calculated mean proper motions and distances for the clusters. Distances derived both from isochrone fitting to colour-magnitude diagrams of the clusters and Gaia DR2 trigonometric parallaxes are compatible with each other. Slopes of the mass functions of the eight open clusters are in good agreement with Salpeter (Astrophys. J. 121:161, 1955) value of 1.35.
ER -
YONTAN, Talar, Selcuk BILIR, Zahide BOSTANCI, Tansel AK, Serap AK, Tolga GUVER, Ernst PAUNZEN, Hakan URGUP, Muslim CELEBI, B. AKTI a Sibel GOKMEN. CCD UBV photometric and Gaia astrometric study of eight open clusters-ASCC 115, Collinder 421, NGC 6793, NGC 7031, NGC 7039, NGC 7086, Roslund 1 and Stock 21. \textit{Astrophysics and Space Science}. DORDRECHT: Springer, 2019, roč.~364, č.~9, s.~1-20. ISSN~0004-640X. Dostupné z: https://dx.doi.org/10.1007/s10509-019-3640-y.
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