The total mass of the early-type galaxy NGC 4649 (M60)
In this paper the problem of the total mass and the total mass-to-light ratio of the early-type galaxy NGC 4649 (M60) is analyzed. Use is made of two independent techniques: the X-ray methodology which is based on the temperature of the X-ray halo of NGC 4649 and the tracer mass estimator (TME) whic...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Astronomical Observatory, Department of Astronomy, Belgrade
2008-01-01
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| Series: | Serbian Astronomical Journal |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/1450-698X/2008/1450-698X0877001S.pdf |
| _version_ | 1811294057713893376 |
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| author | Samurović S. Ćirković M.M. |
| author_facet | Samurović S. Ćirković M.M. |
| author_sort | Samurović S. |
| collection | DOAJ |
| description | In this paper the problem of the total mass and the total mass-to-light ratio of the early-type galaxy NGC 4649 (M60) is analyzed. Use is made of two independent techniques: the X-ray methodology which is based on the temperature of the X-ray halo of NGC 4649 and the tracer mass estimator (TME) which uses globular clusters (GCs) observed in this galaxy. The mass is calculated in Newtonian and Modified Newtonian Dynamics (MOND) approaches and it is found that inside 3 effective radii (Re ) there is no need for large amounts of dark matter. Beyond 3Re the dark matter starts to play important dynamical role. The possible reasons for the discrepancy between the estimates of the total mass based on X-rays and TME in the outer regions of NGC 4649 are also discussed. |
| first_indexed | 2024-04-13T05:11:56Z |
| format | Article |
| id | doaj.art-50695aba1984408e8da27a5951e80984 |
| institution | Directory Open Access Journal |
| issn | 1450-698X 1820-9289 |
| language | English |
| last_indexed | 2024-04-13T05:11:56Z |
| publishDate | 2008-01-01 |
| publisher | Astronomical Observatory, Department of Astronomy, Belgrade |
| record_format | Article |
| series | Serbian Astronomical Journal |
| spelling | doaj.art-50695aba1984408e8da27a5951e809842022-12-22T03:01:01ZengAstronomical Observatory, Department of Astronomy, BelgradeSerbian Astronomical Journal1450-698X1820-92892008-01-0120081771710.2298/SAJ0877001S1450-698X0877001SThe total mass of the early-type galaxy NGC 4649 (M60)Samurović S.0Ćirković M.M.1Astronomical Observatory, BelgradeAstronomical Observatory, BelgradeIn this paper the problem of the total mass and the total mass-to-light ratio of the early-type galaxy NGC 4649 (M60) is analyzed. Use is made of two independent techniques: the X-ray methodology which is based on the temperature of the X-ray halo of NGC 4649 and the tracer mass estimator (TME) which uses globular clusters (GCs) observed in this galaxy. The mass is calculated in Newtonian and Modified Newtonian Dynamics (MOND) approaches and it is found that inside 3 effective radii (Re ) there is no need for large amounts of dark matter. Beyond 3Re the dark matter starts to play important dynamical role. The possible reasons for the discrepancy between the estimates of the total mass based on X-rays and TME in the outer regions of NGC 4649 are also discussed.http://www.doiserbia.nb.rs/img/doi/1450-698X/2008/1450-698X0877001S.pdfgravitationgalaxies: elliptical and lenticularCDgalaxies: kinematics and dynamicsgalaxies: individual: NGC 4649cosmology: dark matter |
| spellingShingle | Samurović S. Ćirković M.M. The total mass of the early-type galaxy NGC 4649 (M60) Serbian Astronomical Journal gravitation galaxies: elliptical and lenticular CD galaxies: kinematics and dynamics galaxies: individual: NGC 4649 cosmology: dark matter |
| title | The total mass of the early-type galaxy NGC 4649 (M60) |
| title_full | The total mass of the early-type galaxy NGC 4649 (M60) |
| title_fullStr | The total mass of the early-type galaxy NGC 4649 (M60) |
| title_full_unstemmed | The total mass of the early-type galaxy NGC 4649 (M60) |
| title_short | The total mass of the early-type galaxy NGC 4649 (M60) |
| title_sort | total mass of the early type galaxy ngc 4649 m60 |
| topic | gravitation galaxies: elliptical and lenticular CD galaxies: kinematics and dynamics galaxies: individual: NGC 4649 cosmology: dark matter |
| url | http://www.doiserbia.nb.rs/img/doi/1450-698X/2008/1450-698X0877001S.pdf |
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