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Abstract:

We present new UBV photoelectric observations of 119 stars in the field of the southern open cluster IC 2488, supplemented by DDO and Washington photometry and Coravel radial velocities for a sample of red giant candidates. Nearly 50% of the stars sampled - including three red giants and one blue straggler - are found to be probable cluster members. Photometric membership probabilities of the red giant candidates show good agreement with those obtained from Coravel data. A mean radial velocity of (-2.63 ± 0.06) km s-1 is derived for the cluster giants. The reddening across the cluster is found to be uniform, the mean value being E(B - V) = 0.24 ± 0.04. IC 2488, located at a distance of (1250 ± 120) pc from the Sun and 96 pc below the Galactic plane, is most probably not related to the planetary nebula ESO 166-PN21. A metal abundance [Fe/H] = 0.10 ± 0.06 relative to the Sun is determined from DDO data of the red giant members, in good agreement with the [Fe/H] values derived from five independent Washington abundance indices. An age of 180 Myr is determined from the fitting of isochrones computed with convective overshooting for Z = 0.019. The isochrone for log t = 8.25 reproduces remarkably well not only the morphology of the upper main sequence but also the observed red giant pattern.

Registro:

Documento: Artículo
Título:Multicolour photometry and coravel observations of stars in the southern open cluster IC 2488
Autor:Clariá, J.J.; Piatti, A.E.; Lapasset, E.; Mermilliod, J.-C.
Filiación:Observatorio Astronómico, Univ. Nacional de Córdoba, Laprida 854, 5000 Córdoba, Argentina
Inst. de Astron./Fisica del Espacio, CC 67, Suc. 28, 1428 Buenos Aires, Argentina
Institut d'Astronomie, Université de Lausanne, 1290 Chavannes-des-Bois, Switzerland
Palabras clave:Methods: observational; Open clusters and associations: individual: IC2488; Star: abundances; Stars: Hertzsprung-Russell (HR) diagram and C-M diagrams; Morphology; Photoelectricity; Photometry; Sun; Coravel observations; Astronomy
Año:2003
Volumen:399
Número:2
Página de inicio:543
Página de fin:551
DOI: http://dx.doi.org/10.1051/0004-6361:20021828
Título revista:Astronomy and Astrophysics
Título revista abreviado:Astron. Astrophys.
ISSN:00046361
CODEN:AAEJA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00046361_v399_n2_p543_Claria

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Citas:

---------- APA ----------
Clariá, J.J., Piatti, A.E., Lapasset, E. & Mermilliod, J.-C. (2003) . Multicolour photometry and coravel observations of stars in the southern open cluster IC 2488. Astronomy and Astrophysics, 399(2), 543-551.
http://dx.doi.org/10.1051/0004-6361:20021828
---------- CHICAGO ----------
Clariá, J.J., Piatti, A.E., Lapasset, E., Mermilliod, J.-C. "Multicolour photometry and coravel observations of stars in the southern open cluster IC 2488" . Astronomy and Astrophysics 399, no. 2 (2003) : 543-551.
http://dx.doi.org/10.1051/0004-6361:20021828
---------- MLA ----------
Clariá, J.J., Piatti, A.E., Lapasset, E., Mermilliod, J.-C. "Multicolour photometry and coravel observations of stars in the southern open cluster IC 2488" . Astronomy and Astrophysics, vol. 399, no. 2, 2003, pp. 543-551.
http://dx.doi.org/10.1051/0004-6361:20021828
---------- VANCOUVER ----------
Clariá, J.J., Piatti, A.E., Lapasset, E., Mermilliod, J.-C. Multicolour photometry and coravel observations of stars in the southern open cluster IC 2488. Astron. Astrophys. 2003;399(2):543-551.
http://dx.doi.org/10.1051/0004-6361:20021828