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Title:
Preliminary Statistical Analysis of Lambda Bootis Stars
Creator:
Ghazaryan, S. ; Alecian, G. ; Paunzen, E. ; Hakobyan, A. A.
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Uncontrolled Keywords:
stars ; abundances – stars ; chemically peculiar – stars ; λ Bootis – methods ; statistical –techniques ; spectroscopic – catalogue
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Abstract:
To enlarge our database of Chemically Peculiar stars, we compiled published data concerning the Lambda Bootis stars observed by high-resolution spectroscopy techniques during last decades. In total, 62 Lambda Bootis stars have been added to the database. To deepen our knowledge on statistical overview of the abundance anomalies versus the physical parameters of stars, our data were compared with previous compilations, as well as with Gaia DR2 data. Different statistical tests were applied on our data for 20 chemical elements for the search of interesting correlations for different physical parameters in the atmospheres of those stars. We confirmed all previous results and obtained correlations between different physical parameters, but because of the lack of the data, we could not find new correlations. We hope, that Gaia EDR3 data, on which we are working now, will help us to improve our database and to understand the nature of all Chemically Peculiar stars.