Hot degenerates in the MCT survey. I. MCT 130-1937, a new, color-selected PG 1159 object
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Date
1990Author
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Abstract
We report the discovery, in the course of a survey for high-latitude, ultraviolet-excess objects in the southern hemisphere, of a new white dwarf star belonging to the PG 1159 spectroscopic class. A variety of spectroscopic observations show this object to be similar to the prototype PG 1159-035 in exhibiting He u, C IV, and O VI features in its optical spectrum, as well as a rich absorption spectrum in the ultraviolet. In addition, the slope of its energy distribution appears as steep as that ...
We report the discovery, in the course of a survey for high-latitude, ultraviolet-excess objects in the southern hemisphere, of a new white dwarf star belonging to the PG 1159 spectroscopic class. A variety of spectroscopic observations show this object to be similar to the prototype PG 1159-035 in exhibiting He u, C IV, and O VI features in its optical spectrum, as well as a rich absorption spectrum in the ultraviolet. In addition, the slope of its energy distribution appears as steep as that of PG 1159-035 and is consistent with the Rayleigh-Jeans tail of a very hot ('I;, 100,000 K) star. White-light, high-speed photometry reveals that this object does not exhibit periodic variations in the range 10-2000 s with semiamplitudes larger than 0.002 mag. The importance of such objects for current models of the spectral evolution of white dwarfs is emphasized. ...
In
The astrophysical journal. Chicago. Vol. 351, no. 1, pt. 1 (Mar. 1990), p. 271-276
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Foreign
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