Browsing by Author "Hammond, Gordon L."
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Hubble space telescope observations of cool white dwarf stars: Detection of new species of heavy elements
Shipman, Harry L.; Barnhill, Maurice; Provençal, Judith L.; Roby, Scott W.; Bues, Irmela; Córdova, France A.; Hammond, Gordon L.; Hintzen, Paul M N; Koester, Detlev; Oswalt, T. D. (1995-03)Observations of cool white dwarf stars with the Hubble Space Telescope has uncovered a number of spectral features from previously unobserved species. In this paper we present the data on four cool white dwarfs. We present ... -
UV observations of the cool DBQA5 white dwarf LDS 678A: Limits on the atmospheric composition, pressure shift, and gravitational redshift derived from C I 2479
Oswalt, T. D.; Sión, Edward M.; Hammond, Gordon L.; Vauclair, Gérard P.; Liebert, James W.; Wegner, Gary A.; Koester, Detlev; Marcum, Pamela M. (1991-02)We present a high-resolution ultraviolet spectrum of the helium-rich degenerate LDS 678A, obtained with the International Ultraviolet Explorer (IUE) satellite. LDS 678A is the coolest metallic line degenerate (DQ or DZ) ...