Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983pasp...95..217w&link_type=abstract
Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 95, March 1983, p. 217-228.
Astronomy and Astrophysics
Astronomy
27
Companion Stars, H Alpha Line, Line Shape, Planetary Nebulae, Stellar Spectra, Variable Stars, Emission Spectra, Stellar Spectrophotometry, Symbiosis
Scientific paper
Emission-line profiles are given for twelve planetary nebulae in Hα and for seven in [O III] λ5007, for four symbiotic stars in Hα, and for the emission objects V1016 Cyg and HM Sge in both Hα and λ5007. Expansion velocities generally between 10 and 30 km s-1 are estimated for the planetary nebulae; the profiles are similar in Hα and λ5007 in most cases for which both are available. The profiles for V1016 Cyg, HM Sge, and the symbiotic stars are much wider and in most cases exhibit variability and multiple components. In particular, the variations in the line profiles of V1016 Cyg and HM Sge are displayed and described.
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