Nebular spectroscopy: A guide on H II regions and planetary nebulae

  title={Nebular spectroscopy: A guide on H II regions and planetary nebulae},
  author={M. Peimbert and Antonio Peimbert and Gloria Delgado-Inglada},
  journal={arXiv: Astrophysics of Galaxies},
We present a tutorial on the determination of the physical conditions and chemical abundances in gaseous nebulae. We also include a brief review of recent results on the study of gaseous nebulae, their relevance for the study of stellar evolution, galactic chemical evolution, and the evolution of the universe. One of the most important problems in abundance determinations is the existence of a discrepancy between the abundances determined with collisionally excited lines and those determined by… 

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