Winds in central stars of planetary nebulae

Abstract

view Abstract Citations (136) References (46) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Winds in central stars of planetary nebulae. Cerruti-Sola, M. ; Perinotto, M. Abstract The physical properties of stellar winds have been studied using the low-resolution IUE spectra for 60 central stars in planetary nebulae. Approximately half of the 42 stars with a measurable stellar continuum displayed P Cygni profiles in UV absorption lines. The appearance of wind was correlated with stellar temperature and radius. Central stars with temperatures less than log T(eff) of about 4.8 almost uniformly had winds, while among those stars with higher temperatures, little evidence of stellar wind was found. Nuclei with radii larger than log R/solar radius of about -0.5 showed evidence of wind, while those with smaller radii generally did not. On the basis of the derived P Cygni profiles, it is argued that a stellar wind is always present in the central star of a planetary nebula when the gravity is smaller than log g of about 5.2. The terminal velocities of the central stars were in the 1400-5000 km/s range, and the estimated mass loss rates were between 3 x 10 to the -10th and 3 x 10 to the -7th solar mass per year. A table listing the observed stars is provided. Publication: The Astrophysical Journal Pub Date: April 1985 DOI: 10.1086/163062 Bibcode: 1985ApJ...291..237C Keywords: Planetary Nebulae; Stellar Winds; Ultraviolet Spectra; Gas Ionization; Hertzsprung-Russell Diagram; Iue; Stellar Mass Ejection; Astrophysics full text sources ADS | data products SIMBAD (60) MAST (1) INES (1)