Session
2024 Poster Session
Location
Salt Lake Community College Westpointe Campus, Salt Lake City, UT
Start Date
5-6-2024 9:55 AM
Description
Recent measurements showed that many globular clusters (GCs) contain multiple populations. Among GC stellar membership, variable stars called RR Lyrae are commonly used as tracers. We set out to look at RR Lyrae variable stars that are within confirmed multiple population GCs to investigate if the metallicities or RR Lyrae periods could be used as indicators for multiple populations. We used Gaia spacecraft data in conjunction with measurements on multiple populations (Milone et al. 2017) to check for correlations between metallicity and the fraction of first generation stars to the total numbers of stars (N1/NTot). While no links were found between metallicity, its spread, its standard deviation, and N1/NTot, we did find a loose correlation with the period spread of the RR Lyrae variable stars and N1/NTot.
RR Lyrae Variable Metallicities in Globular Clusters with Known Multiple Stellar Populations
Salt Lake Community College Westpointe Campus, Salt Lake City, UT
Recent measurements showed that many globular clusters (GCs) contain multiple populations. Among GC stellar membership, variable stars called RR Lyrae are commonly used as tracers. We set out to look at RR Lyrae variable stars that are within confirmed multiple population GCs to investigate if the metallicities or RR Lyrae periods could be used as indicators for multiple populations. We used Gaia spacecraft data in conjunction with measurements on multiple populations (Milone et al. 2017) to check for correlations between metallicity and the fraction of first generation stars to the total numbers of stars (N1/NTot). While no links were found between metallicity, its spread, its standard deviation, and N1/NTot, we did find a loose correlation with the period spread of the RR Lyrae variable stars and N1/NTot.