The ∆a photometric system
The ∆a photometric system

Author: Ernst Paunzen

Publisher: Cuvillier Verlag

Published: 2020-10-13

Total Pages: 248

ISBN-13: 3736962835

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This book describes the characteristics and applications of the Δa photometric system, which measures the stellar flux at around 520 nm. Since its introduction in 1976 by Hans-Michael Maitzen, the Δa system has not only been successfully applied to the classical chemically peculiar stars of the upper main sequence, but also to galactic and extragalactic star clusters. New possible applications for studying galaxies, quasars and other astrophysical objects of interest are discussed.

Calibration of Fundamental Stellar Quantities
Calibration of Fundamental Stellar Quantities

Author: D.S. Hayes

Publisher: Springer Science & Business Media

Published: 2012-12-06

Total Pages: 625

ISBN-13: 9400954565

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Proceedings of the 111th Symposium of the International Astronomical Union held at Villa Olmo, Como, Italy, May 24-29, 1984