Fig. 6 from Helium Abundance in the Most Metal‐deficient Blue Compact Galaxies: I Zw 18 and SBS 0335−052

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Helium Abundance in the Most Metal‐deficient Blue Compact Galaxies: I Zw 18 and SBS 0335−052

Authors: Yuri I. Izotov, Frederic H. Chaffee, Craig B. Foltz, Richard F. Green, Natalia G. Guseva, and Trinh X. Thuan

Izotov et al. 1999 The Astrophysical Journal 527 757.

Provider: AAS Journals

Caption: Fig. 6.

Spatial distributions of the He I nebular emission‐line equivalent widths (left panels) in I Zw 18 and (right panels) in SBS 0335−052. The error bars are 1 σ deviations. The value of the minimum equivalent width for each He I emission line is given.

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