Revisiting the Extended Schmidt Law: The Important Role of Existing Stars in Regulating Star Formation

  title={Revisiting the Extended Schmidt Law: The Important Role of Existing Stars in Regulating Star Formation},
  author={Yong Shi and Lin Yan and Lee Armus and Qiusheng Gu and George Helou and Keping Qiu and Stephen D. J. Gwyn and Sabrina Stierwalt and Min Fang and Yan-mei Chen and Luwenjia Zhou and Jingwen Wu and Xianzhong Zheng and Zhi-yu Zhang and Yu Gao and Junzhi Wang},
  journal={The Astrophysical Journal},
We revisit the proposed extended Schmidt law, which posits that the star formation efficiency in galaxies depends on the stellar mass surface density, by investigating spatially resolved star formation rates (SFRs), gas masses, and stellar masses of star formation regions in a vast range of galactic environments, from the outer disks of dwarf galaxies, to spiral disks and to merging galaxies, as well as individual molecular clouds in M33. We find that these regions are distributed in a tight… 

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