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astro-ph.GA2026
Column-Density Estimation from the Equivalent Widths of Absorption Doublets
Avshalom Badash, Doron Kushnir
Na I D absorption is widely used to estimate the dust extinction toward Galactic and extragalactic sources, but the inferred column densities are unreliable once the lines saturate…
astro-ph.GA2026
The Distance to NGC 4258 from Individual Maser Component Tracking
Daniella van der Boom, Doron Kushnir
We present a reanalysis of the water maser system in NGC 4258 to reassess its geometric distance, commonly reported as approximately 7.6 Mpc with percent-level accuracy, a key anch…