Ultraviolet Fe VII absorption lines in planetary nebula nuclei, hot subdwarfs, and hot degenerate objects

Abstract

view Abstract Citations (34) References (40) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Ultraviolet Fe VII Absorption Lines in Planetary Nebula Nuclei, Hot Subdwarfs, and Hot Degenerate Objects Feibelman, Walter A. ; Bruhweiler, Frederick C. Abstract Results are reported from a search for Fe VII absorption lines in data from high-dispersion IUE-SWP observations of PN nuclei (PNN), hot subdwarfs (HSDs), and hot white dwarfs (HWDs). The data-reduction techniques employed are outlined, and the results are presented in extensive tables and sample spectra and characterized in detail. Absorption in at least one of the four Fe VII lines above 120 nm wavelength is found in 22 of 51 PNN, and possibly in 10 HSDs, in the pulsating HWD PG 1159 - 035, and in the PNN K1 - 16. It is concluded that Fe VII is more common in WD progenitors such as PNN than previously predicted and is especially typical of the more luminous low-gravity stars. Publication: The Astrophysical Journal Pub Date: July 1990 DOI: 10.1086/168942 Bibcode: 1990ApJ...357..548F Keywords: Hot Stars; Planetary Nebulae; Subdwarf Stars; Ultraviolet Spectra; White Dwarf Stars; Absorption Spectra; Iue; Line Spectra; Stellar Winds; Astrophysics; NEBULAE: PLANETARY; STARS: SUBDWARFS; STARS: WHITE DWARFS; ULTRAVIOLET: SPECTRA full text sources ADS | data products SIMBAD (63) MAST (1) INES (1)