The baryonic Tully–Fisher relation of H <scp>i</scp>-bearing low-surface brightness galaxies implies their formation mechanism

ABSTRACT We investigate the baryonic Tully–Fisher relation in low-surface brightness galaxies selected from the Arecibo Legacy Fast ALFA survey. We find that the H i-bearing low surface brightness galaxies still follow the baryonic Tully–Fisher relation of typical late-type galaxies, with a slope of approximately 4 in the baryonic mass versus rotational velocity diagram on the logarithmic scale, i.e. $M_{\rm {b}}\propto v_{\rm {rot}}^4$. Our findings suggest that the matter distributions in low-surface brightness galaxies may resemble that of general late-type galaxies, and hint that low-surface brightness galaxies may not originate from dark matter haloes of low densities or stronger/weaker feedback processes, but may emerge from dark matter haloes with high spin values.