Multicolour photometry and coravel observations of stars in the southern open cluster IC 2488
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 st...
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2003
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00046361_v399_n2_p543_Claria http://hdl.handle.net/20.500.12110/paper_00046361_v399_n2_p543_Claria |
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paper:paper_00046361_v399_n2_p543_Claria2023-06-08T14:27:29Z Multicolour photometry and coravel observations of stars in the southern open cluster IC 2488 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 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. 2003 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00046361_v399_n2_p543_Claria http://hdl.handle.net/20.500.12110/paper_00046361_v399_n2_p543_Claria |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
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R-134 |
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
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 |
| spellingShingle |
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 Multicolour photometry and coravel observations of stars in the southern open cluster IC 2488 |
| topic_facet |
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 |
| description |
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. |
| title |
Multicolour photometry and coravel observations of stars in the southern open cluster IC 2488 |
| title_short |
Multicolour photometry and coravel observations of stars in the southern open cluster IC 2488 |
| title_full |
Multicolour photometry and coravel observations of stars in the southern open cluster IC 2488 |
| title_fullStr |
Multicolour photometry and coravel observations of stars in the southern open cluster IC 2488 |
| title_full_unstemmed |
Multicolour photometry and coravel observations of stars in the southern open cluster IC 2488 |
| title_sort |
multicolour photometry and coravel observations of stars in the southern open cluster ic 2488 |
| publishDate |
2003 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00046361_v399_n2_p543_Claria http://hdl.handle.net/20.500.12110/paper_00046361_v399_n2_p543_Claria |
| _version_ |
1768543112491171840 |