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| Paper: |
Investigating the Gaseous Content of Massive Galaxy Group Halos |
| Volume: |
540, Compendium of Undergraduate Research in Astronomy and Space Science |
| Page: |
1 |
| Authors: |
Solis, S.; Berg, M. A.; Chisholm, J. |
| Abstract: |
Within the circumgalactic medium, higher mass structures are expected to have less cool gas; previous studies have shown that clusters (∼ 1015 M⊙) have a cumulative covering factor of ≈ 1%. In this study, we investigate the distribution of cool gas within massive galaxy groups (∼ 1014 M⊙) that house two luminous red galaxies (LRGs) to understand the cool gas content of structures between 1013 and 1015 M⊙. We analyzed spectroscopic data from the Mayall/ DESI survey, collected from 49 quasar sightlines in the northern hemisphere, targeting galaxies with redshifts 0.45 ≤ zLRG ≤ 1.15. We assessed the distribution of cool gas by measuring Mg II equivalent widths and calculating the covering factor. Our findings reveal a cumulative covering factor of 25 ± 6%, suggesting an abundance of cool gas available for star formation in massive groups. This value is similar to that observed in smaller mass groups (∼ 1013 M⊙), indicating that the mass transition point from abundant cool gas to little or no cool gas (as seen in clusters) has not yet been observed. |
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