An analysis of ALFALFA galaxies finds a weak to moderate inverse correlation between estimated halo spin and stellar surface density, with slopes consistent with zero at about 1 sigma.
Strong Correlation between Galactic HI-to-stellar Mass Ratio And Halo Spin Explored by HI-rich Galaxies
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abstract
Using a semi-analytic approach, we estimate halo spins for a large sample of HI-rich galaxies from the Arecibo Legacy Fast Alfa Survey and examine the correlation between HI mass fractions and halo spins. Our analysis reveals a strong correlation between halo spin and the HI-to-stellar mass ratio in both low-mass and massive galaxy samples. This finding suggests a universal formation scenario: higher halo spin reduces angular momentum loss and gas condensation, leading to lower star formation rates and weaker feedback, which in turn helps retain gas within dark matter halos.
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Moderate Influence of Halo Spin on Stellar Mass Distributions in Dwarf and Massive Galaxies
An analysis of ALFALFA galaxies finds a weak to moderate inverse correlation between estimated halo spin and stellar surface density, with slopes consistent with zero at about 1 sigma.