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Presentation . 2025
License: CC BY
Data sources: Datacite
ZENODO
Presentation . 2025
License: CC BY
Data sources: Datacite
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Refining CGM Dynamics: Understanding Multi-Sightline Variation in Cool Gas with Gravitationally Lens

Authors: Sullivan, Jessica;

Refining CGM Dynamics: Understanding Multi-Sightline Variation in Cool Gas with Gravitationally Lens

Abstract

Circumgalactic medium (CGM) studies must often rely on single pencil-beam absorption measurements per galaxy, limiting our understanding of the full dynamics and scales of CGM material. Gravitationally lensed quasars offer a unique opportunity to probe multiple sightlines through a single galaxy's CGM. By characterizing absorption variations across these sightlines over ~10s kpc scales, we can refine our understanding of intra-CGM variation and its impact on single-sightline measurements and derived "ensemble" properties. While previous studies using gravitationally lensed quasars were constrained to small samples due to their rarity, modern search techniques have significantly increased their discovery rate, enabling larger-scale investigations. I will present a galaxy-centric analysis of MgII absorption associated with 63 galaxies at z~0.25-1.39 within ~1.5 Rvir of the lensed quasars. I will discuss the comparison of the scatter in the anticorrelation between MgII equivalent width and impact parameter in our lensed quasar sample to that observed in single-sightline ensemble studies as well as the observed variations or lack thereof of the MgII absorption within individual CGM.

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spatial resolution

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
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