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DOI :10.26650/PAR.2024.00002   IUP :10.26650/PAR.2024.00002    Tam Metin (PDF)

SED Analysis of the Old Open Cluster NGC 188

Deniz Cennet Dursun, Seval Taşdemir, Seliz Koç, Srishti Iyer

In this study, we investigate the fundamental astrophysical parameters of the old open cluster NGC 188 using two complementary methods: isochron fitting and spectral energy distribution (SED) analysis. Using photometric, astrometric, and spectroscopic data from the Gaia Data Release 3 (DR3, Gaia Collaboration et al. 2023), we identified 868 most likely member stars with membership probabilities 𝑃 ≥ 0.5. The mean proper-motion components and trigonometric parallaxes of the cluster are derived as (𝜇𝛼 cos 𝛿, 𝜇𝛿) = (-2.314±0.002, -1.022±0.002) mas yr−1 and 𝜛 = 0.550±0.023 mas, respectively. From this initial selection of high probable member stars, we proceed with the determination of astrophysical parameters using the isochron-fitting method. Simultaneously estimating the colour excess, distance and age of the cluster, we employe PARSEC isochrones to observational data on Gaia based colour-magnitude diagrams. These findings were obtained as 𝐸(𝐺BP − 𝐺RP) = 0.066 ± 0.012 mag, 𝑑 = 1806 ± 21 pc, and 𝑡 = 7.65 ± 1.00 Gyr, respectively. In addition, we identified and detected 19 previously confirmed blue straggler stars within NGC 188. Subsequently, we performed SED analyses for 412 of the 868 cluster members. We obtained colour excess, distance and age of the cluster as 𝐸(𝐵 −𝑉) = 0.034±0.030 mag, 𝑑 = 1854±148 pc, and 𝑡 = 7.78±0.23 Gyr, respectively. The analysis of member stars revealed patterns of extinction in the 𝑉-band, with higher values of 𝐴V observed in the lower right quadrant of the cluster. By comparing our SED analysis results with models of stellar evolution, particularly in terms of temperature and surface gravity, we confirm agreement with theoretical predictions. This comprehensive investigation sheds light on the astrophysical properties of NGC 188, contributing to our understanding of stellar evolution within open clusters.

Anahtar Kelimeler: Galaxy: open clusters, individual: NGC 188, Methods: spectral energy distribution (SED)

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DIŞA AKTAR



APA

Dursun, D.C., Taşdemir, S., Koç, S., & Iyer, S. (2024). SED Analysis of the Old Open Cluster NGC 188. Physics and Astronomy Reports, 2(1), 1-17. https://doi.org/10.26650/PAR.2024.00002


AMA

Dursun D C, Taşdemir S, Koç S, Iyer S. SED Analysis of the Old Open Cluster NGC 188. Physics and Astronomy Reports. 2024;2(1):1-17. https://doi.org/10.26650/PAR.2024.00002


ABNT

Dursun, D.C.; Taşdemir, S.; Koç, S.; Iyer, S. SED Analysis of the Old Open Cluster NGC 188. Physics and Astronomy Reports, [Publisher Location], v. 2, n. 1, p. 1-17, 2024.


Chicago: Author-Date Style

Dursun, Deniz Cennet, and Seval Taşdemir and Seliz Koç and Srishti Iyer. 2024. “SED Analysis of the Old Open Cluster NGC 188.” Physics and Astronomy Reports 2, no. 1: 1-17. https://doi.org/10.26650/PAR.2024.00002


Chicago: Humanities Style

Dursun, Deniz Cennet, and Seval Taşdemir and Seliz Koç and Srishti Iyer. “SED Analysis of the Old Open Cluster NGC 188.” Physics and Astronomy Reports 2, no. 1 (Sep. 2024): 1-17. https://doi.org/10.26650/PAR.2024.00002


Harvard: Australian Style

Dursun, DC & Taşdemir, S & Koç, S & Iyer, S 2024, 'SED Analysis of the Old Open Cluster NGC 188', Physics and Astronomy Reports, vol. 2, no. 1, pp. 1-17, viewed 12 Sep. 2024, https://doi.org/10.26650/PAR.2024.00002


Harvard: Author-Date Style

Dursun, D.C. and Taşdemir, S. and Koç, S. and Iyer, S. (2024) ‘SED Analysis of the Old Open Cluster NGC 188’, Physics and Astronomy Reports, 2(1), pp. 1-17. https://doi.org/10.26650/PAR.2024.00002 (12 Sep. 2024).


MLA

Dursun, Deniz Cennet, and Seval Taşdemir and Seliz Koç and Srishti Iyer. “SED Analysis of the Old Open Cluster NGC 188.” Physics and Astronomy Reports, vol. 2, no. 1, 2024, pp. 1-17. [Database Container], https://doi.org/10.26650/PAR.2024.00002


Vancouver

Dursun DC, Taşdemir S, Koç S, Iyer S. SED Analysis of the Old Open Cluster NGC 188. Physics and Astronomy Reports [Internet]. 12 Sep. 2024 [cited 12 Sep. 2024];2(1):1-17. Available from: https://doi.org/10.26650/PAR.2024.00002 doi: 10.26650/PAR.2024.00002


ISNAD

Dursun, DenizCennet - Taşdemir, Seval - Koç, Seliz - Iyer, Srishti. “SED Analysis of the Old Open Cluster NGC 188”. Physics and Astronomy Reports 2/1 (Sep. 2024): 1-17. https://doi.org/10.26650/PAR.2024.00002



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