ASTROPHYSICAL AND STRUCTURAL PARAMETERS, AND DYNAMICAL EVOLUTION OF THE OPEN CLUSTERS NGC 1245 AND NGC 2099

Hikmet Çakmak; Orhan Güneş; Yüksel Karataş

doi:10.18038/estubtda.673575

TR EN

ASTROPHYSICAL AND STRUCTURAL PARAMETERS, AND DYNAMICAL EVOLUTION OF THE OPEN CLUSTERS NGC 1245 AND NGC 2099

Abstract

We derive astrophysical and structural parameters of open clusters NGC 1245 and NGC 2099 from 2MASS JHKs and Gaia DR2 photometric / astrometric data bases. Their likely members have been determined from Gaia DR2 proper motion data. Our E(B – V) values (2MASS) are slightly smaller than the literature values, whereas our E(B – V) values (Gaia DR2) agree with the literature within the uncertainties. Their distance moduli/distances and ages are in good coincident with the literature. NGC 1245 has steep negative core mass function slope (MFs) (χ_core=-1.24). It’s at halo (χ_halo=+0.78) and at overall (χ_overall=-0.95) MFs mean that it presents signs of small-scale mass segregation to the outer regions from its core, due to its [t_rlx (overall),τ_overall ]=[302 Myr,5]. The MFs of NGC 2099 is very negative steep (χ_core=-2.67) in the core, and quite positive steep (χ_halo=+1.41) in the halo. This kind of MF slope steeping from the core to the outskirts indicates that low-mass stars in the core are transferred to the cluster's outskirts, while massive stars sink in the core, because of mass segregation. NGC 2099's flat overall MFs (χ_overall=+0.91) and its τ_overall=8 presents a sign of mass segregation. These OCs with the relatively large masses 8700 Msolar (NGC 1245) and 5660 Msolar (NGC 2099), which locate at RGC > 9 kpc, expose to external perturbations such as tidal effects and shock waves, and they lose their stars in low-proportions.

Keywords

Galaxy: open clusters and associations, open cluster: NGC 1245, Individual Galaxy: Stellar Content,

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Details

Primary Language

English

Subjects

-

Journal Section

Research Article

Authors

Hikmet Çakmak ^*
0000-0002-1959-6049
Türkiye

Orhan Güneş
0000-0003-1263-808X
Türkiye

Yüksel Karataş
0000-0002-7737-6589
Türkiye

Publication Date

December 28, 2020

Submission Date

January 13, 2020

Acceptance Date

December 12, 2020

Published in Issue

Year 2020 Volume: 21 Number: 4

DOI

https://doi.org/10.18038/estubtda.673575

IZ

https://izlik.org/JA29AY35GP

APA

Çakmak, H., Güneş, O., & Karataş, Y. (2020). ASTROPHYSICAL AND STRUCTURAL PARAMETERS, AND DYNAMICAL EVOLUTION OF THE OPEN CLUSTERS NGC 1245 AND NGC 2099. Eskişehir Technical University Journal of Science and Technology A - Applied Sciences and Engineering, 21(4), 525-538. https://doi.org/10.18038/estubtda.673575

AMA

1.Çakmak H, Güneş O, Karataş Y. ASTROPHYSICAL AND STRUCTURAL PARAMETERS, AND DYNAMICAL EVOLUTION OF THE OPEN CLUSTERS NGC 1245 AND NGC 2099. Estuscience - Se. 2020;21(4):525-538. doi:10.18038/estubtda.673575

Chicago

Çakmak, Hikmet, Orhan Güneş, and Yüksel Karataş. 2020. “ASTROPHYSICAL AND STRUCTURAL PARAMETERS, AND DYNAMICAL EVOLUTION OF THE OPEN CLUSTERS NGC 1245 AND NGC 2099”. Eskişehir Technical University Journal of Science and Technology A - Applied Sciences and Engineering 21 (4): 525-38. https://doi.org/10.18038/estubtda.673575.

EndNote

Çakmak H, Güneş O, Karataş Y (December 1, 2020) ASTROPHYSICAL AND STRUCTURAL PARAMETERS, AND DYNAMICAL EVOLUTION OF THE OPEN CLUSTERS NGC 1245 AND NGC 2099. Eskişehir Technical University Journal of Science and Technology A - Applied Sciences and Engineering 21 4 525–538.

IEEE

[1]H. Çakmak, O. Güneş, and Y. Karataş, “ASTROPHYSICAL AND STRUCTURAL PARAMETERS, AND DYNAMICAL EVOLUTION OF THE OPEN CLUSTERS NGC 1245 AND NGC 2099”, Estuscience - Se, vol. 21, no. 4, pp. 525–538, Dec. 2020, doi: 10.18038/estubtda.673575.

ISNAD

Çakmak, Hikmet - Güneş, Orhan - Karataş, Yüksel. “ASTROPHYSICAL AND STRUCTURAL PARAMETERS, AND DYNAMICAL EVOLUTION OF THE OPEN CLUSTERS NGC 1245 AND NGC 2099”. Eskişehir Technical University Journal of Science and Technology A - Applied Sciences and Engineering 21/4 (December 1, 2020): 525-538. https://doi.org/10.18038/estubtda.673575.

JAMA

1.Çakmak H, Güneş O, Karataş Y. ASTROPHYSICAL AND STRUCTURAL PARAMETERS, AND DYNAMICAL EVOLUTION OF THE OPEN CLUSTERS NGC 1245 AND NGC 2099. Estuscience - Se. 2020;21:525–538.

MLA

Çakmak, Hikmet, et al. “ASTROPHYSICAL AND STRUCTURAL PARAMETERS, AND DYNAMICAL EVOLUTION OF THE OPEN CLUSTERS NGC 1245 AND NGC 2099”. Eskişehir Technical University Journal of Science and Technology A - Applied Sciences and Engineering, vol. 21, no. 4, Dec. 2020, pp. 525-38, doi:10.18038/estubtda.673575.

Vancouver

1.Hikmet Çakmak, Orhan Güneş, Yüksel Karataş. ASTROPHYSICAL AND STRUCTURAL PARAMETERS, AND DYNAMICAL EVOLUTION OF THE OPEN CLUSTERS NGC 1245 AND NGC 2099. Estuscience - Se. 2020 Dec. 1;21(4):525-38. doi:10.18038/estubtda.673575

ASTROPHYSICAL AND STRUCTURAL PARAMETERS, AND DYNAMICAL EVOLUTION OF THE OPEN CLUSTERS NGC 1245 AND NGC 2099

Abstract

ASTROPHYSICAL AND STRUCTURAL PARAMETERS, AND DYNAMICAL EVOLUTION OF THE OPEN CLUSTERS NGC 1245 AND NGC 2099

Abstract

Keywords

References

Details

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Subjects

Journal Section

Authors

Publication Date

Submission Date

Acceptance Date

Published in Issue

DOI

IZ

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