Plate 28: Luminosity Effects at F2

Star Index

Plate 28: Luminosity Effects at F2

The band-like absorption feature having an edge near λ3685 is due to the Balmer continuum and higher members of the Balmer series; it has a positive luminosity effect at F2.

The line Sr II 4078 does not discriminate well between la and Ib supergiants in the spectral range F2–F8.

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