Photometric and kinematic studies of open clusters Ruprecht 1 and Ruprecht 171


Çakmak H., Yontan T., Bilir S., Soydugan E., Banks T., Raul M., ...More

ASTRONOMISCHE NACHRICHTEN, vol.345, no.8, pp.1-24, 2024 (SCI-Expanded)

  • Publication Type: Article / Article
  • Volume: 345 Issue: 8
  • Publication Date: 2024
  • Doi Number: 10.1002/asna.20240054
  • Journal Name: ASTRONOMISCHE NACHRICHTEN
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, L'Année philologique, Aerospace Database, INSPEC, zbMATH
  • Page Numbers: pp.1-24
  • Istanbul University Affiliated: Yes

Abstract

This study outlines a detailed investigation using CCD UBV and Gaia DR3 data sets of the two open clusters Ruprecht 1 (Rup-1) and Ruprecht 171 (Rup-171). Fundamental astrophysical parameters such as color excesses, photometric metallicities, ages, and isochrone distances were based on UBV-data analyses, whereas membership probability calculations, structural and astrophysical parameters, as well as the kinematic analyses were based on Gaia DR3-data. We identified 74 and 596 stars as the most probable cluster members with membership probabilities over 50% for Rup-1 and Rup-171, respectively. The color excesses 𝐸(𝐵 − 𝑉 ) were obtained as 0.166 ± 0.022 and 0.301 ± 0.027 mag for Rup-1 and Rup-171, respectively. Photometric metallicity analyses were performed by considering F-G type main-sequence member stars and found to be [Fe/H]=−0.09 ± 0.16 and [Fe/H]=−0.20 ± 0.20 dex for Rup-1 and Rup-171, respectively. Ages and distances were based on both UBV and Gaia-data analyses; according to isochrone-fitting these values were estimated to be 𝑡 = 580 ± 60 Myr, 𝑑 = 1469 ± 57 pc for Rup-1 and 𝑡 = 2700 ± 200 Myr, 𝑑 = 1509 ± 69 pc for Rup-171. The present-day mass function slope of Rup-1 was estimated as 1.26 ± 0.32 and Rup-171 as 1.53 ± 1.49. Galactic orbit integration analyses showed that both of the clusters might be formed outside the solar circle.