SIMBAD references

We present a narrow Hα-band imaging survey of 357 low surface brightness galaxies (LSBGs) that are selected from the spring sky region of the 40% Arecibo Legacy Fast Arecibo L-band Feed Array (ALFALFA) H I Survey. All the Hα images are obtained from the 2.16 m telescope, operated by the Xinglong Observatory of the National Astronomical Observatories, Chinese Academy of Sciences. We provide the Hα fluxes and derive the global star formation rates (SFRs) of LSBGs after the Galactic extinction, internal extinction, and [N II] contamination correction. Compared to normal star-forming galaxies, LSBGs have a similar distribution in the H I surface density (Σ_H I_), but their SFRs and star formation surface density (Σ_SFR) are much lower. Our results show that the gas-rich LSBGs selected from the ALFALFA survey obviously deviate from the Kennicutt-Schmidt law, in the relation between the star formation surface density (Σ_SFR) and the gas surface density (Σ_gas). However, they follow the extended Schmidt law well when taking the stellar mass of the galaxy into consideration.