The Impact of FUSE on our Understanding of Stellar Post-AGB Evolution

Journal Article · Sun May 24 00:00:00 EDT 2009 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3154043· OSTI ID:21304930

Rauch, T; Werner, K; Ziegler, M ^[1]; Koesterke, L ^[2]; Kruk, J W; Oliveira, C M ^[3]

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1. Institute for Astronomy and Astrophysics, Kepler Center for Astro and Particle Physics, Eberhard Karls University, Tuebingen (Germany)
2. Texas Advanced Computer Center, University of Texas, Austin, TX 78712 (United States)
3. Department of Physics and Astronomy, Johns Hopkins University, Baltimore, MD 21218 (United States)

State-of-the-art non-LTE spectral analysis requires high-resolution and high-S/N observations of strategic metal lines in order to achieve reliable photospheric parameters like, e.g., effective temperature, surface gravity, and element abundances.Hot stars with effective temperatures higher than about 40 000 K exhibit their metal-line spectrum arising from highly ionized species predominantly in the (far) ultraviolet wavelength range.FUSE observations of hot, compact stars provided the necessary data. With these, it has been, e.g., possible to identify fluorine for the first time in observations of post-AGB stars. The evaluation of ionization equilibria of highly ionized neon, phosphorus, sulfur, and argon provides a new sensitive tool to determine effective temperatures of the hottest stars precisely. Moreover, abundance determinations have put constraints on stellar evolutionary models which, in turn, have improved greatly our picture of post-AGB evolution.

• OSTI ID: 21304930
• Journal Information: AIP Conference Proceedings, Vol. 1135, Issue 1; Conference: Conference on future directions in ultraviolet spectroscopy inspired by the accomplishments of the Far Ultraviolet Spectroscopic Explorer Mission, Annapolis, MD (United States), 20-22 Oct 2008; Other Information: DOI: 10.1063/1.3154043; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
ARGON IONS
ASTROPHYSICS
ELEMENT ABUNDANCE
EMISSION SPECTROSCOPY
FAR ULTRAVIOLET RADIATION
GIANT STARS
GRAVITATION
MULTICHARGED IONS
NEON IONS
PHOSPHORUS
PHOSPHORUS IONS
PHOTOIONIZATION
SIGNAL-TO-NOISE RATIO
STAR EVOLUTION
SULFUR IONS
WHITE DWARF STARS