TY - JOUR
T1 - UBV I CCD photometry of the open clusters NGC 4609 and Hogg 15
AU - Kook, Seung Hwa
AU - Sung, Hwankyung
AU - Bessell, M. S.
PY - 2010
Y1 - 2010
N2 - UBV I CCD photometry is obtained for the open clusters NGC 4609 and Hogg 15 in Crux. For NGC 4609, CCD data are presented for the first time. From new photometry we derive the reddening, distance modulus and age of each cluster - NGC 4609: E(B - V) = 0.37 ± 0.03, V0-MV = 10.60 ± 0.08, log Γ = 7.7 ± 0.1; Hogg 15: E(B - V) = 1.13 ± 0.11, V0-MV = 12.50 ± 0.15, log Γ ≲ 6.6. The young age of Hogg 15 strongly implies that WR 47 is a member of the cluster. We also determine the mass function of these clusters and obtain a slope Γ = -1:2 (±0:3) for NGC 4609 which is normal and a somewhat shallow slope (Γ = -0:95 ± 0:5) for Hogg 15.
AB - UBV I CCD photometry is obtained for the open clusters NGC 4609 and Hogg 15 in Crux. For NGC 4609, CCD data are presented for the first time. From new photometry we derive the reddening, distance modulus and age of each cluster - NGC 4609: E(B - V) = 0.37 ± 0.03, V0-MV = 10.60 ± 0.08, log Γ = 7.7 ± 0.1; Hogg 15: E(B - V) = 1.13 ± 0.11, V0-MV = 12.50 ± 0.15, log Γ ≲ 6.6. The young age of Hogg 15 strongly implies that WR 47 is a member of the cluster. We also determine the mass function of these clusters and obtain a slope Γ = -1:2 (±0:3) for NGC 4609 which is normal and a somewhat shallow slope (Γ = -0:95 ± 0:5) for Hogg 15.
KW - Color-magnitude diagrams (H-R diagram)
KW - Individual (NGC 4609 & Hogg 15)
KW - Open clusters and associations
UR - http://www.scopus.com/inward/record.url?scp=78649641368&partnerID=8YFLogxK
U2 - 10.5303/JKAS.2010.43.5.141
DO - 10.5303/JKAS.2010.43.5.141
M3 - Article
SN - 1225-4614
VL - 43
SP - 141
EP - 152
JO - Journal of the Korean Astronomical Society
JF - Journal of the Korean Astronomical Society
IS - 5
ER -