Some remarks on the open cluster upgren 1 using uvby − β photoelectric photometry
The open cluster Upgren 1 presents peculiar features that in the past led to divergent opinions about its existence. In previous studies of other clusters, uvby − β photoelectric photometry has shown results in agreement with other techniques; therefore, the photometry obtained in the present work h...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2019 |
| País: | México |
| Institución: | Universidad Nacional Autónoma de México |
| Repositorio: | Redalyc-UNAM |
| OAI Identifier: | oai:redalyc.org:57171631010 |
| Acceso en línea: | https://www.redalyc.org/articulo.oa?id=57171631010 https://www.redalyc.org/journal/571/57171631010/ https://www.redalyc.org/journal/571/57171631010/html/ https://www.redalyc.org/journal/571/57171631010/57171631010.epub https://www.redalyc.org/journal/571/57171631010/movil |
| Access Level: | acceso abierto |
| Palabra clave: | Física, Astronomía y Matemáticas techniques photometric individual (Upgren 1) Open clusters and associations |
| Sumario: | The open cluster Upgren 1 presents peculiar features that in the past led to divergent opinions about its existence. In previous studies of other clusters, uvby − β photoelectric photometry has shown results in agreement with other techniques; therefore, the photometry obtained in the present work has been combined with data from previous studies to examine the brightest stars in the direction of the cluster. Analyzing the unreddened indexes, we found that all the stars are of late spectral types. Applying the empirical relations of Nissen (1987) to determine the reddening and, consequently, the unreddened indexes, we found that all but three are located at a distance of 123 ± 17 pc. The assigned membership in this study is in concordance with that of Upgren, Philip and Beaver (1982) obtained through radial velocities. |
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