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Abstract:

In this paper we present charge-coupled device (CCD) images in the Johnson B and V and Kron-Cousins I passbands for the previously unstudied open cluster NGC 5288. The sample consists of 15 688 stars reaching down to V∼ 20.5. The cluster appears to have a relatively small but conspicuous nucleus and a low-density extended coronal region. Star counts carried out in 25 × 25 pixel2 boxes distributed throughout the whole observed field allowed us to estimate the angular core and corona radii as ∼1.3 and 6.3 arcmin, respectively. Our analysis suggests that NGC 5288 is moderately young and probably more metal-rich than the Sun. Adopting the theoretical metal content Z= 0.040, which provides the best global fit, we derive an age of 130+40-30 Myr. Simultaneously, we have obtained colour excesses E(B-V) = 0.75 and E(V-I) = 0.95 and an apparent distance modulus V-MV= 14.00. The law of interstellar extinction in the cluster direction is found to be normal. NGC 5288 is located at 2.1 ± 0.3 kpc from the Sun beyond the Carina spiral feature and ∼7.4 kpc from the Galactic Centre. The cluster metallicity seems to be compatible with the cluster position in the Galaxy, given the recognized radial abundance gradient in the disc. For the first time, in this paper we determine the basic parameters for the open cluster NGC 5381, situated in the same direction as NGC 5288. This determination was reached by using CCD VI data published almost a decade ago by b28Pietrzyński et al. (1997) for NGC 5381. The properties of some open clusters aligned along the line of sight of NGC 5288 are examined. The properties of clusters of similar ages to NGC 5288 are also looked into. Evidence is presented that these did not form mainly along the spiral arms but rather in the thin Galactic disc (Z∼±100 pc). © 2006 RAS.

Registro:

Documento: Artículo
Título:First estimates of the fundamental parameters of the relatively bright Galactic open cluster NGC 5288
Autor:Piatti, A.E.; Clariá, J.J.; Ahumada, A.V.
Filiación:Instituto de Astronomía y Física del Espacio, CC 67, Suc. 28, 1428 Ciudad de Buenos Aires, Argentina
Observatorio Astronómico, Universidad Nacional de Córdoba, Laprida 854, 5000 Córdoba, Argentina
Palabras clave:Open clusters and associations:general; Open clusters and associations:individual:NGC 5288; Techniques:photometric
Año:2006
Volumen:367
Número:2
Página de inicio:599
Página de fin:610
DOI: http://dx.doi.org/10.1111/j.1365-2966.2005.09930.x
Título revista:Monthly Notices of the Royal Astronomical Society
Título revista abreviado:Mon. Not. R. Astron. Soc.
ISSN:00358711
CODEN:MNRAA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00358711_v367_n2_p599_Piatti

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Citas:

---------- APA ----------
Piatti, A.E., Clariá, J.J. & Ahumada, A.V. (2006) . First estimates of the fundamental parameters of the relatively bright Galactic open cluster NGC 5288. Monthly Notices of the Royal Astronomical Society, 367(2), 599-610.
http://dx.doi.org/10.1111/j.1365-2966.2005.09930.x
---------- CHICAGO ----------
Piatti, A.E., Clariá, J.J., Ahumada, A.V. "First estimates of the fundamental parameters of the relatively bright Galactic open cluster NGC 5288" . Monthly Notices of the Royal Astronomical Society 367, no. 2 (2006) : 599-610.
http://dx.doi.org/10.1111/j.1365-2966.2005.09930.x
---------- MLA ----------
Piatti, A.E., Clariá, J.J., Ahumada, A.V. "First estimates of the fundamental parameters of the relatively bright Galactic open cluster NGC 5288" . Monthly Notices of the Royal Astronomical Society, vol. 367, no. 2, 2006, pp. 599-610.
http://dx.doi.org/10.1111/j.1365-2966.2005.09930.x
---------- VANCOUVER ----------
Piatti, A.E., Clariá, J.J., Ahumada, A.V. First estimates of the fundamental parameters of the relatively bright Galactic open cluster NGC 5288. Mon. Not. R. Astron. Soc. 2006;367(2):599-610.
http://dx.doi.org/10.1111/j.1365-2966.2005.09930.x