# Statistical analysis of the new catalogue of CP stars

## TL;DR

This paper conducts a statistical analysis of a new catalogue of 428 Chemically Peculiar stars, examining correlations between chemical abundances and physical parameters using high-resolution spectroscopic data.

## Contribution

It introduces a comprehensive statistical approach to analyze chemical and physical properties of CP stars, highlighting specific correlations and the role of multiplicity.

## Key findings

- Identified correlations between chemical abundances and physical parameters.
- Highlighted specific cases such as Mn in HgMn stars and Ca in AmFm stars.
- Used statistical tests to explore the influence of multiplicity on abundance peculiarities.

## Abstract

This talk is devoted to the statistical analysis of the new catalogue of Chemically Peculiar stars compiled from papers, where chemical abundances of those stars were given. The catalogue contains chemical abundances and physical parameters of 428 stars based on high-resolution spectroscopy data. Spearman's rank correlation test was applied for 416 CP (108 HgMn, 188 ApBp and 120 AmFm) stars and the correlation between chemical abundances and different physical parameters (effective temperature, surface gravity and rotational velocity) was checked. From dozens interesting cases we secluded four cases: the Mn peculiarities in HgMn stars, the Ca correlation with respect to effective temperature in AmFm stars, the case of helium and iron in ApBp stars. We applied also Anderson-Darling (AD) test on ApBp stars to check if multiplicity is a determinant parameter for abundance peculiarities.