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A Survey for Planetary Nebulae in M31 Globular Clusters

  • Authors: George H. Jacoby, Robin Ciardullo, Orsola De Marco, Myung Gyoon Lee, Kimberly A. Herrmann, Ho Seong Hwang, Evan Kaplan, and James E. Davies

Jacoby et al. 2013 The Astrophysical Journal 769 10.

  • Provider: AAS Journals

Caption: Figure 8.

The spectra of five M31 young clusters in the wavelength range between 4800 Å and 5100 Å. To enhance the visibility of the emission lines, the spectrum of a template young cluster been subtracted from each object; in some cases, a mismatch in age has resulted in a poor subtraction around Hβ. The y-axis represents counts; to convert to relative flux, note that the response at Hβ is roughly 1.46 times less than that at [O iii] λ5007. For each candidate, the [O iii] line is at least twice the strength of Hβ.

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