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The ∆a photometric system

Hard Copy
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The ∆a photometric system (English shop)

Ernst Paunzen (Author)


Extract, PDF (320 KB)
Table of Contents, PDF (54 KB)

ISBN-13 (Hard Copy) 9783736972834
ISBN-13 (eBook) 9783736962835
Language English
Page Number 248
Lamination of Cover matt
Edition 1
Publication Place Göttingen
Publication Date 2020-10-13
General Categorization Non-Fiction
Departments Physics
Astrophysics and astronomy
Keywords Sterngruppen, Sternhaufen, star clusters, Δa-Photometersystem, Galaxie, Quasars, Quasaren, CP1-Sterne, CP2-Sterne, CP3-Sterne, CP4-Sterne, stars, λ Bootis Sterne, Programmsterne, program stars, Rötung, reddening, Isochrone, Isochronenanpassung, isochrone fitting, Δa-Filtersystem,Δa filter system, Luminositätseffekte, luminosity effects, Metallizitätseffekte, metallicity effects, Modellatmosphäre,model atmosphere, Spektroskopie, Abundanz, Mikroturbulenz, microturbulence, Magnetfelder, magnetic fields, Abundanzmuster, abundance patterns, spektroskopische Doppelsterne, spectroscopic binary stars, Doppelsternsystem, binary star system, Kugelsternhaufen, globular clusters, Magellansche Wolke, Magellanic Cloud, Licht-Variabilität, light variability, Lichtschwankungen, light variations, Emissionslinien, emission lines, absorption, CCD-Technologie, Photomultiplier, Belichtungszeit, exposure time, Zielhelligkeit, target brightness, Astrophysik, astrophysics, Sternwarte, observatory, Hans-Michael Maitzen, V-Lichtkurve, Wellenlänge, wavelengths, Asteroseismologie, asteroseismology. Standardabweichung, standard deviation, Photonenrauschen, Nachweisgrenze, photon noise, detection limit, Helligkeitsklasse, luminosity classes, Helium, Blaue Nachzügler, Blue Stragglers, Sternkollision, star collision

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.