Phenomenological approach to the modelling of elliptical galaxies: The problem of the mass-to-light ratio
In this paper the problem of the phenomenological modelling of elliptical galaxies using various available observational data is presented. Recently, Tortora, Cardona and Piedipalumbo (2007) suggested a double power law expression for the global cumulative mass-to-light ratio of elliptical galaxies....
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| Format: | Article |
| Language: | English |
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Astronomical Observatory, Department of Astronomy, Belgrade
2007-01-01
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| Series: | Serbian Astronomical Journal |
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| Online Access: | http://www.doiserbia.nb.rs/img/doi/1450-698X/2007/1450-698X0774035S.pdf |
| _version_ | 1818543864385896448 |
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| author | Samurović S. |
| author_facet | Samurović S. |
| author_sort | Samurović S. |
| collection | DOAJ |
| description | In this paper the problem of the phenomenological modelling of elliptical galaxies using various available observational data is presented. Recently, Tortora, Cardona and Piedipalumbo (2007) suggested a double power law expression for the global cumulative mass-to-light ratio of elliptical galaxies. We tested their expression on a sample of ellipticals for which we have the estimates of the mass-to-light ratio beyond ~ 3 effective radii, a region where dark matter is expected to play an important dynamical role. We found that, for all the galaxies in our sample, we have α + β > 0, but that this does not necessarily mean a high dark matter content. The galaxies with higher mass (and higher dark matter content) also have higher value of α+β. It was also shown that there is an indication that the galaxies with higher value of the effective radius also have higher dark matter content. . |
| first_indexed | 2024-12-11T22:40:57Z |
| format | Article |
| id | doaj.art-0c21d61f5b0a41b587547e39cab0c35e |
| institution | Directory Open Access Journal |
| issn | 1450-698X 1820-9289 |
| language | English |
| last_indexed | 2024-12-11T22:40:57Z |
| publishDate | 2007-01-01 |
| publisher | Astronomical Observatory, Department of Astronomy, Belgrade |
| record_format | Article |
| series | Serbian Astronomical Journal |
| spelling | doaj.art-0c21d61f5b0a41b587547e39cab0c35e2022-12-22T00:47:48ZengAstronomical Observatory, Department of Astronomy, BelgradeSerbian Astronomical Journal1450-698X1820-92892007-01-012007174354210.2298/SAJ0774035S1450-698X0774035SPhenomenological approach to the modelling of elliptical galaxies: The problem of the mass-to-light ratioSamurović S.0Astoronomska opservatorija, BeogradIn this paper the problem of the phenomenological modelling of elliptical galaxies using various available observational data is presented. Recently, Tortora, Cardona and Piedipalumbo (2007) suggested a double power law expression for the global cumulative mass-to-light ratio of elliptical galaxies. We tested their expression on a sample of ellipticals for which we have the estimates of the mass-to-light ratio beyond ~ 3 effective radii, a region where dark matter is expected to play an important dynamical role. We found that, for all the galaxies in our sample, we have α + β > 0, but that this does not necessarily mean a high dark matter content. The galaxies with higher mass (and higher dark matter content) also have higher value of α+β. It was also shown that there is an indication that the galaxies with higher value of the effective radius also have higher dark matter content. .http://www.doiserbia.nb.rs/img/doi/1450-698X/2007/1450-698X0774035S.pdfgalaxies: kinematics and dynamicsgalaxies: elliptical and lenticulargalaxies: structuredark mattergalaxies |
| spellingShingle | Samurović S. Phenomenological approach to the modelling of elliptical galaxies: The problem of the mass-to-light ratio Serbian Astronomical Journal galaxies: kinematics and dynamics galaxies: elliptical and lenticular galaxies: structure dark matter galaxies |
| title | Phenomenological approach to the modelling of elliptical galaxies: The problem of the mass-to-light ratio |
| title_full | Phenomenological approach to the modelling of elliptical galaxies: The problem of the mass-to-light ratio |
| title_fullStr | Phenomenological approach to the modelling of elliptical galaxies: The problem of the mass-to-light ratio |
| title_full_unstemmed | Phenomenological approach to the modelling of elliptical galaxies: The problem of the mass-to-light ratio |
| title_short | Phenomenological approach to the modelling of elliptical galaxies: The problem of the mass-to-light ratio |
| title_sort | phenomenological approach to the modelling of elliptical galaxies the problem of the mass to light ratio |
| topic | galaxies: kinematics and dynamics galaxies: elliptical and lenticular galaxies: structure dark matter galaxies |
| url | http://www.doiserbia.nb.rs/img/doi/1450-698X/2007/1450-698X0774035S.pdf |
| work_keys_str_mv | AT samurovics phenomenologicalapproachtothemodellingofellipticalgalaxiestheproblemofthemasstolightratio |