Physical Interpretation Of Asymmetry Parameter in Galaxies
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| Formato: | Artículo científico |
| Lenguaje: | en |
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Universidad Nacional Autónoma de México
2001
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| _version_ | 1876479019784863744 |
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| author | Roberto Romano |
| author_facet | Roberto Romano |
| contents | Physical Interpretation Of Asymmetry Parameter in Galaxies Roberto Romano Divakara Mayya Física, Astronomía y Matemáticas Early type galaxies, in general, appear to be more symmetric than late type galaxies. There have been attempts to quantify this trend into an asymmetry parameter, aiming to determine the morphological type of distant galaxies. Studies conducted on samples of nearby galaxies find a fairly reasonable correlation between asymmetry and morphological type of galaxies. However, it is important to understand the correlation physically before the correlation could be used to classify distant galaxies. With this purpose we carried out a multi-band analysis of asymmetry of nearby galaxies. We find a dependence between asymmetry parameter and wavelength which can be explained by a model, i n which recently formed stars play an important role. The model also reproduces the correlation of asymmetry parameter with global quantities such as color and Halpha flux of galaxies. From these analyses, we conclude that asymmetry parameter is closely tied to the current star formation rate and hence its use as a morphological indicator is limited. 2001 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57101138 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.11 |
| format | Artículo científico |
| id | redalyc_57101138 |
| institution | Redalyc |
| language | en |
| publishDate | 2001 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | Physical Interpretation Of Asymmetry Parameter in Galaxies Roberto Romano Física, Astronomía y Matemáticas Physical Interpretation Of Asymmetry Parameter in Galaxies Roberto Romano Divakara Mayya Física, Astronomía y Matemáticas Early type galaxies, in general, appear to be more symmetric than late type galaxies. There have been attempts to quantify this trend into an asymmetry parameter, aiming to determine the morphological type of distant galaxies. Studies conducted on samples of nearby galaxies find a fairly reasonable correlation between asymmetry and morphological type of galaxies. However, it is important to understand the correlation physically before the correlation could be used to classify distant galaxies. With this purpose we carried out a multi-band analysis of asymmetry of nearby galaxies. We find a dependence between asymmetry parameter and wavelength which can be explained by a model, i n which recently formed stars play an important role. The model also reproduces the correlation of asymmetry parameter with global quantities such as color and Halpha flux of galaxies. From these analyses, we conclude that asymmetry parameter is closely tied to the current star formation rate and hence its use as a morphological indicator is limited. 2001 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57101138 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.11 |
| title | Physical Interpretation Of Asymmetry Parameter in Galaxies |
| topic | Física, Astronomía y Matemáticas |
| url | https://www.redalyc.org/articulo.oa?id=57101138 |