info:eu-repo/semantics/article
Multicolor Photometry of Red Giant Candidates in the Southern Open Cluster NGC 2447
Fecha
2005-12Registro en:
Claria Olmedo, Juan Jose; Piatti, Andres Eduardo; Lapasset Gomar, Emilio; Parisi, Maria Celeste; Multicolor Photometry of Red Giant Candidates in the Southern Open Cluster NGC 2447; Inst Theoretical Physics Astronomy; Baltic Astronomy; 14; 12-2005; 301-311
1392-0049
CONICET Digital
CONICET
Autor
Claria Olmedo, Juan Jose
Piatti, Andres Eduardo
Lapasset Gomar, Emilio
Parisi, Maria Celeste
Resumen
Photoelectric photometry in the UBV, DDO and Washington systems is
presented for 14 late-type giant candidates of the southern open cluster
NGC 2447. By applying two independent photometric criteria, nine stars
are found to have a high probability of being cluster giants. The
photometric membership results are in good agreement with those derived
from published Coravel radial velocities. The mean interstellar
reddening E<sub>B-V</sub> = 0.05±0.04 has been derived from the
confirmed cluster giants. NGC 2447 has a mean ultraviolet excess
<δ (U-B)> = 0.01±0.02 (σ <sub>n</sub>) with
respect to solar composition K giants, and a mean cyanogen anomaly
<Δ CN> = 0.01±0.02 (σ <sub>n</sub>), both
implying a small metal deficiency ([Fe/H] ≃ -0.1). Five independent
Washington abundance indices yield a mean cluster metallicity of [Fe/H]
= -0.09±0.06, in agreement with the two previous estimates.
Therefore, NGC 2447 is found to be slightly metal-poor.