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CCD UBV ( RI ) KC photometry of the open clusters Juchert 9 and Berkeley 97
Author(s) -
Oralhan İnci Akkaya,
Michel Raúl,
Karsli Yonca,
Çakmak Hikmet,
Sung Hwankyung,
Karataş Yüksel
Publication year - 2020
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/asna.202013647
Subject(s) - physics , photometry (optics) , open cluster , astrophysics , stars , observatory , astronomy
The CCD UBV ( RI ) KC photometry of the poorly studied open clusters Juchert 9 (Juc 9) and Berkeley 97 (Be 97), which are observed with the 0.84 m telescope at the San Pedro Mártir National Observatory, México has been analyzed. For the likely cluster members, we determined the reddenings, E(B‐V) = 0.82 ± 0.04 (Juc 9) and E(B‐V) = 0.87 ± 0.05 (Be 97), from the early type stars. Our distance moduli/distances for only ( B − V ) color are (V 0 ‐M V , d [kpc]) = (13.40 ± 0.10, 4.8 ± 0.2 kpc) (Juc 9) and (12.40 ± 0.12, 3.0 ± 0.2 kpc) (Be 97), respectively. The Gaia DR2 distances are d = 4.5 ± 1.2 kpc (Juc 9) and d = 3.1 ± 0.7 kpc (Be 97) from the median parallaxes with σ ϖ / ϖ < 0.20, which are in good agreement with the photometric distances within the uncertainties. The solar abundance PARSEC isochrones give us the intermediate ages, 30 ± 10 Myr for Juc 9 and 100 ± 30 Myr for Be 97.