HCN J = 4–3, HNC J = 1–0, H13CN J = 1–0, and HC3N J = 10–9 Maps of Galactic Center Region. II. Physical Properties of Dense-gas Clumps and Probability of Star Formation

@article{Tanaka2020HCNJ,
  title={HCN J = 4–3, HNC J = 1–0, H13CN J = 1–0, and HC3N J = 10–9 Maps of Galactic Center Region. II. Physical Properties of Dense-gas Clumps and Probability of Star Formation},
  author={Kunihiko Tanaka and Makoto Nagai and Kazuhisa Kamegai and Takahiro Iino and Takeshi Sakai},
  journal={arXiv: Astrophysics of Galaxies},
  year={2020}
}
We report a statistical analysis exploring the origin of the overall low star formation efficiency (SFE) of the Galactic central molecular zone (CMZ) and the SFE diversity among the CMZ clouds using a wide-field HCN $J$=4-3 map, whose optically thin critical density ($\sim10^7\,\mathrm{cm}^{-3}$) is the highest among the tracers ever used in CMZ surveys. Logistic regression is performed to empirically formulate star formation probability of 195 HCN clumps, 13 of which contain star formation… Expand
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