Review of the Classification and Properties of 40 Variable Stars in Sagittarius

TL;DR

This paper reviews and updates the classification and properties of 40 variable stars in Sagittarius, confirming variability, discovering new period/type data, and correcting database errors using period analysis and photometric comparisons.

Contribution

It provides new period and type classifications for 15 stars and corrects database cross-references, enhancing the understanding of these variable stars.

Findings

Confirmed variability for all stars

Discovered new period/type data for 15 stars

Corrected database cross-references and identified inconsistencies

Abstract

This study aims to assess the properties and classification of 40 variable stars in Sagittarius, little studied since their discovery and reported in the Information Bulletin on Variable Stars (IBVS) 985 and update. Using data from previous studies and several astronomical databases, we performed our analysis mainly utilizing a period analysis software and comparing the photometric characteristics of the variables in a Colour-Absolute Magnitude Diagram. For all stars, the variability is confirmed. We discovered new significant results for the period and/or type of 15 variables and highlighted incorrect cross-reference names on astronomical databases for 5 stars. This assessment also identifies 9 cases for which results from the ASAS-SN Catalog of Variable Stars are systematically not consistent with the original light curves. A correct identification of NSV 10522 is provided.