Speaker
Description
The physical origins of the cool gas traced by Mg II absorption lines around massive galaxies remain an open question. Previous studies have suggested that the cool gas around luminous red galaxies (LRGs) may be associated with their satellite galaxies. In this talk, I will present our effort to test this scenario. We use the largest sample of LRG–QSO pairs from the Dark Energy Spectroscopic Instrument (DESI) and perform cross-correlation measurements to probe the satellite galaxy distribution around LRGs with and without detected Mg II absorption. These measurements allow us to examine whether the detection of Mg II absorption correlates with the presence of satellite galaxies in the vicinity of the sightline, shedding light on the origins of cool gas around massive galaxies.
| Participate the oral/poster presentation award competition | No |
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