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| Natura: | Artículo científico |
| Lingua: | en |
| Pubblicazione: |
Universidad Nacional Autónoma de México
2009
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| Accesso online: | https://www.redalyc.org/articulo.oa?id=57115687028 |
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Sommario:
- SEARCHING FOR COMPACT STAR CLUSTERS IN M81 USING HST/ACS IMAGES M. Santiago-Cortés Y. D. Mayya D. Rosa-González Física, Astronomía y Matemáticas Catalogs galaxies: star clusters galaxies: individual (M81) We study the stellar cluster population in M81, using the HST/ACS images in the filters F435W, F606W and F814W that cover a total field of view of ¿ 140 arcmin2. We present details about the selection criteria, which were based both on morphological and photometrical features. The extracted sample of stellar clusters shows the presence of two cluster populations, a blue cluster group (young) with 560 objects, and a red cluster group (old) with 120 objects. The young group lacks clusters more massive than 104M, that are present in large numbers in its neighbor M82. The luminosity distribution function of the young group follows a power-lawdistribution with ¿ = 2.0, whereas that for the red group resembles very much the globular cluster luminosity function in the Milky Way. Assuming an age of 5 Gyr, these red clusters have masses between 105 and 107M. 2009 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57115687028 en http://www.redalyc.org/revista.oa?id=571 Revista Mexicana de Astronomía y Astrofísica application/pdf Universidad Nacional Autónoma de México Revista Mexicana de Astronomía y Astrofísica (México) Vol.37