Browsing by Author "Schonberner, D."

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    • The blue straggler stars of galactic clusters 

      Schonberner, D.; Napiwotzki, R. (Astronomical Society of the Pacific, 1993)
      The origin and evolution of blue straggler stars (BS) in clusters is still an unsolved problem for our understanding of stellar evolution. Several rivalling theories exist, of which that of Saio & Wheeler (1980) is the ...

    • Convective overshooting and the observed width of the main-sequence band 

      Napiwotzki, R.; Rieschick, A.; Blocker, T.; Schonberner, D.; Wenske, V. (Astronomical Society of the Pacific, 1993)
      For many years we are witnessing a lively debate on the existence and extent of convective overshooting, mainly in the cores of main-sequence stars. This is an important issue, since even a small amount of overshooting ...

    • The planetary nebulae of PG 1159 stars - clues to their evolutionary history 

      Napiwotzki, R.; Haas, S.; Schonberner, D. (Astronomical Society of the Pacific, 1996)
      It is shown that many planetary nebulae (PN) surrounding PG 1159 stars display a bipolar morphology. The frequency of these nebulae is higher than observed in other PN samples. Implications for the evolutionary history of ...