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Browsing by Subject "Stars: Post-AGB"

Browsing by Subject "Stars: Post-AGB"

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  • Atmospheric abundances in post-AGB candidates of intermediate temperature 
    Arellano Ferro, A; Giridhar, S; Mathias, P (EDP Sciences, 2001-03)
    Detailed atmospheric abundances have been calculated for a sample of -G supergiant stars with IR fluxes and/or high galactic latitudes. HD 172481 and HD 158616 show clear indications of being post-AGB stars that have ...
  • Detection of Zinc in the Very Metal-Poor Post-AGB Star HR 4049 
    Takeda, Yoichi; Parthasarathy, M; Aoki, W; Ita, Yoshifusa; Nakada, Yoshikazu; Izumiura, Hideyuki; Noguchi, Kunio; Takada-Hidai, Masahide; Sato, B; Tajitsu, Akito; Honda, Satoshi; Kawanomoto, Satoshi; Ando, Hiroyasu; Karoji, Hiroshi (Astronomical Society of Japan, 2002-10-25)
    We report on the detection of two Zn I lines at 4722.15Å and 4810.53Å in the high-quality spectrum of the very metal-poor post-AGB star HR 4049, which was obtained with the High Dispersion Spectrograph attached to the ...
  • Fading and variations in the spectrum of the central star of the very young planetary nebula SAO 244567 (Hen 1357). 
    Parthasarathy, M; Garcia-Lario, P; de Martino, D; Pottasch, S. R; Kilkenny, D; Martinez, P; Sahu, K. C; Reddy, B. E; Sewell, B. T (EDP Sciences, 1995-08)
    The optical spectrum of SAO 244567 obtained in 1971 shows that it was a post-AGB B1 or B2 supergiant at that time. It has turned into a planetary nebula (PN ) within the last 20 years. The IUE ultraviolet spectra obtained ...
  • Spectroscopic properties of post-AGB stars 
    Parthasarathy, M (Cambridge University Press, 2006)
    A review of the spectroscopic properties of post-AGB stars is presented.
  • Weak emission line [WELS] central stars of planetary nebulae are [WC]-PG1159 stars 
    Parthasarathy, M; Acker, A; Stenholm, B (European Southern Observatory, 1998-01)
    The characteristics of the spectra of weak emission line stars (WELS) are found to be very similar to that of [WC]-PG1159 and PG1159 objects. On the basis of the spectra we find 31 WELS central stars of planetary nebulae ...

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