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arxiv 2108.13520 v1 pith:MNRT6EPZ submitted 2021-08-30 astro-ph.SR

Hot Degenerates in the MCT Survey. III. A Sample of White Dwarf Stars in the Southern Hemisphere

P. Bergeron , F. Wesemael , G. Fontaine , R. Lamontagne , S. Demers , A. B\'edard , M.-J. Gingras , S. Blouin
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M.J. Irwin S.O. Kepler
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classification astro-ph.SR
keywords whitedwarfsurveydwarfshemispheresamplesouthernspectra
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We present optical spectra of 144 white dwarfs detected in the Montreal-Cambridge-Tololo (MCT) colorimetric survey, including 120 DA, 12 DB, 4 DO, 1 DQ, and 7 DC stars. We also perform a model atmosphere analysis of all objects in our sample using the so-called spectroscopic technique, or the photometric technique in the case of DC white dwarfs. The main objective of this paper is to contribute to the ongoing effort of confirming spectroscopically all white dwarf candidates in the Gaia survey, in particular in the southern hemisphere. All our spectra are made available in the Montreal White Dwarf Database.

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Cited by 1 Pith paper

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  1. White dwarfs within 13 pc: Insights from ultraviolet spectroscopy

    astro-ph.SR 2026-07 conditional novelty 6.0

    UV spectroscopy of the 44 nearest white dwarfs reveals a 2–6% temperature discrepancy between UV and optical model fits, six UV-only metal detections, and a 30% planetary debris accretion rate.