Mass Estimation in the Globular Cluster M4 |
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Authors: | MY Amin M Rassem M Marie |
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Institution: | (1) Astronomy Department, Faculty of Science, Cairo University, Cairo, Egypt |
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Abstract: | Using the kinematical data we try to solve the Jeans equation to provide mass estimation of the globular cluster M4. The proper
motion data provides two independent velocity dispersion profiles which we need in this estimation. Moreover, we have calculated
the density distribution function and checked the anisotropy of the velocity dispersion.
The comparison of the dynamical mass with the estimation stellar mass for M4 gives the best estimation of the mass inside
a spherical shell centered on the cluster, with a radius corresponding to 840 arcsec on the sky, as 4-5× 104 M
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This revised version was published online in July 2006 with corrections to the Cover Date. |
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Keywords: | |
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