White dwarfs in old planetary nebulae

Details White dwarfs in old planetary nebulae White dwarfs in old planetary nebulae

Oct 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aca....43..343n&link_type=abstract

Acta Astronomica, vol. 43, no. 4, p. 343-352

Astronomy and Astrophysics

Astronomy

28

Astronomical Spectroscopy, Balmer Series, Hot Stars, Planetary Nebulae, Stellar Composition, Stellar Evolution, White Dwarf Stars, Carbon, Helium, Hydrogen

Scientific paper

The results of a spectroscopic investigation of the central stars of old planetary nebulae (PN) are reported. Most of them are hydrogen-rich (pre-)white dwarfs. The classification of the helium- and carbon-rich central stars is examined more closely. We investigate the Balmer line problem of the hydrogen-rich central stars with the aid of the hot sdO star BD+28 deg 4211. The evolutionary status of the central stars of old PN is discussed.

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