2024
DOI: 10.1093/mnras/stad3889
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The Halo21 absorption modelling challenge: lessons from ‘observing’ synthetic circumgalactic absorption spectra

Zachary Hafen,
Sameer,
Cameron Hummels
et al.

Abstract: In the Halo21 absorption modeling challenge we generated synthetic absorption spectra of the circumgalactic medium (CGM), and attempted to estimate the metallicity, temperature, and density (Z, T, and nH) of the underlying gas using observational methods. We iteratively generated and analyzed three increasingly-complex data samples: ion column densities of isolated uniform clouds, mock spectra of 1–3 uniform clouds, and mock spectra of high-resolution turbulent mixing zones. We found that the observational est… Show more

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