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On local stellar age distributions and the history of the stellar birthrate in the galactic disk
Author(s) -
Meusinger H.
Publication year - 1991
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/asna.2113120403
Subject(s) - physics , astrophysics , disc , stars , young stellar object , astronomy , star formation , stellar population , thick disk , stellar evolution , galaxy , galaxy formation and evolution , halo
The fraction of nearby stars born at different galactocentric radii is roughly estimated using the epicyclic approximation of stellar orbits in the galactic disk. Especially, the question of a possible burst origin of features in the local stellar age distribution is discussed. If the “bump” at about 4 Gyr in the frequency distribution of stellar isochrone ages (M EUSINGER 1991) is explained by star formation events then they have been locally at the solar galactocentric distance or globally in the whole disk.