Understanding Lyα Nebulae at Low Redshift. I. The Sizes, Powering, and Kinematics of “Green Bean” Galaxies

@article{Prescott2019UnderstandingLN,
  title={Understanding Lyα Nebulae at Low Redshift. I. The Sizes, Powering, and Kinematics of “Green Bean” Galaxies},
  author={M. Prescott and Kelly N. Sanderson},
  journal={The Astrophysical Journal},
  year={2019},
  volume={885},
  pages={40}
}
  • M. Prescott, Kelly N. Sanderson
  • Published 2019
  • Physics
  • The Astrophysical Journal
  • A new but rare sample of spatially extended emission line nebulae, nicknamed “Green Beans”, was discovered at z ≈ 0.3 thanks to strong [O iii] emission, and subsequently shown to be local cousins of the Lyman-α (Lyα) nebulae found at high redshift. Here we use follow-up APO/DIS spectroscopy to better understand how these low redshift Lyα nebulae compare to other populations of strong emission line sources. Our spectroscopic data show that low-z Lyα nebulae have AGN-like emission line ratios… CONTINUE READING

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