Abstract
The estimation of the main parameters of star clusters is a very important target in astrophysical studies. Many of the open clusters listed in known catalogs have insufficient astrometric parameters. Improving the observations and analysis methods proved that some of them are asterisms and not true clusters. The most important aspect of using the GAIA DR2 survey lies in the positions, parallax and proper motions for the cluster stars with the homogeneous photometry, which makes the membership candidates precisely determined. In this respect, several astor-photometric parameters of the open star cluster Kronberger 60 have been estimated. On studying the radial density profile, the radius is found to be \(10.0\pm 0.5\) arcmin. It is located at a distance of \(1935\pm 90\) pc, with an age of \(800\pm 50\) Myr. Also, the reddening, the luminosity and mass functions, and the total mass of the cluster have been estimated as well. Our study shows a dynamical relaxation behavior of Kronberger 60.
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Acknowledgements
This work is part of a project called “IMHOTEP” program No. 42088ZK between Egypt and France. The authors are grateful to the Academy of Scientific Research and to the service of scientific cooperation in both countries for giving them the opportunity to work through this project and provide the necessary support to accomplish their scientific goals. They thank Prof. David Valls-Gabaud, for being a companion in this project, and for his valuable discussions during the authors’ visit to Paris in September 2019. This work has made use of data from the European Space Agency (ESA) mission Gaia processed by the Gaia Data Processing and Analysis Consortium (DPAC), (https://www.cosmos.esa.int/web/gaia/dpac/consortium). Funding for the DPAC has been provided by national institutions, in particular, the institutions participating in the Gaia Multilateral Agreement.
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Tadross, A.L., Hendy, Y.H. Characteristics of the open star cluster Kronberger 60 using Gaia DR2. J Astrophys Astron 42, 6 (2021). https://doi.org/10.1007/s12036-020-09648-5
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DOI: https://doi.org/10.1007/s12036-020-09648-5