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Two New Late–Type Degenerates: Implications for the White Dwarf Luminosity Function

Published online by Cambridge University Press:  12 April 2016

Conard C. Dahn ,
David G. Monet  and
Hugh C. Harris
Conard C. Dahn
Affiliation:
U. S. Naval Observatory Flagstaff, Arizona 86002
David G. Monet
Affiliation:
U. S. Naval Observatory Flagstaff, Arizona 86002
Hugh C. Harris
Affiliation:
U. S. Naval Observatory Flagstaff, Arizona 86002

Extract

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Recent preliminary USNO CCD parallax solutions for over 100 fields have yielded relative parallaxes with formal errors less than 0″.0030 for approximately 60 faint (15.9 ≤ V ≤ 20.3) stars. The stars observed include a variety of late-type dwarfs, extreme subdwarfs, and degenerates. Among the latter are the well-known, spectroscopically confirmed degenerates LP543–32/33 (= LHS239/240), LP131–66 (= LHS342), LP754–16 (= LHS483), LP702–7 (= LHS542), LP374–4 (= LHS2364), and LP322–800 (= LHS2673), all of which have Mv ≥ 15.0. In addition, two “new” (in terms of previously lacking both spectroscopic confirmations and absolute luminosity estimates) late-type degenerates were identified — LP53–7 (= LHS1405) and LP550–178 (= LHS2288) — both with proper motions in the range

Type
Research Article
Information
International Astronomical Union Colloquium , Volume 114: White Dwarfs , 1989 , pp. 24 - 28
Copyright
Copyright © Springer-Verlag 1989

References

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