Surface Brightness Profiles of Galactic Globular Clusters
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| Format: | Artículo científico |
| Langue: | en |
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Universidad Nacional Autónoma de México
2003
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| _version_ | 1876436424745549824 |
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| author | Eva Noyola |
| author_facet | Eva Noyola |
| contents | Surface Brightness Profiles of Galactic Globular Clusters Eva Noyola Karl Gebhardt Física, Astronomía y Matemáticas Globular Clusters : General We present surface brightness profiles for 28 galactic globular clusters. The profiles come from archival images of the WFPC2 camera on HST using a variety of filters. An important tool for studying any dynamical system is using the surface brightness profile to obtain the luminosity density. In particular, the central slope of the luminosity density profile can have a significant effect on the system evolution. The profiles are obtained by measuring residual light after subtracting the brightest stars, and combining this profile with that obtained from star counts. The clusters in our sample are reported to have a variety of surface brightness shapes, from core-collapse to very low concentration. The results show that the inner logarithmic slope for the luminosity density profile spans a continuous range from zero to 1.7 instead of dividing in at cores and very steep profiles. 2003 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57101820 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.18 |
| format | Artículo científico |
| id | redalyc_57101820 |
| institution | Redalyc |
| language | en |
| publishDate | 2003 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | Surface Brightness Profiles of Galactic Globular Clusters Eva Noyola Física, Astronomía y Matemáticas Globular Clusters : General Surface Brightness Profiles of Galactic Globular Clusters Eva Noyola Karl Gebhardt Física, Astronomía y Matemáticas Globular Clusters : General We present surface brightness profiles for 28 galactic globular clusters. The profiles come from archival images of the WFPC2 camera on HST using a variety of filters. An important tool for studying any dynamical system is using the surface brightness profile to obtain the luminosity density. In particular, the central slope of the luminosity density profile can have a significant effect on the system evolution. The profiles are obtained by measuring residual light after subtracting the brightest stars, and combining this profile with that obtained from star counts. The clusters in our sample are reported to have a variety of surface brightness shapes, from core-collapse to very low concentration. The results show that the inner logarithmic slope for the luminosity density profile spans a continuous range from zero to 1.7 instead of dividing in at cores and very steep profiles. 2003 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57101820 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.18 |
| title | Surface Brightness Profiles of Galactic Globular Clusters |
| topic | Física, Astronomía y Matemáticas Globular Clusters : General |
| url | https://www.redalyc.org/articulo.oa?id=57101820 |