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Title:
Albus 1: A Very Bright White Dwarf Candidate
Authors:
Caballero, José Antonio; Solano, Enrique
Affiliation:
AA(Max-Planck-Institut für Astronomie, D-69117 Heidelberg, Germany; ), AB(Laboratorio de Astrofísica Espacial y Física Fundamental, INSA, E-28080 Madrid, Spain; )
Publication:
The Astrophysical Journal, Volume 665, Issue 2, pp. L151-L154. (ApJ Homepage)
Publication Date:
08/2007
Origin:
UCP
ApJ Keywords:
Galaxy: Solar Neighborhood, Stars: Subdwarfs, Stars: White Dwarfs
DOI:
10.1086/521439
Bibliographic Code:
2007ApJ...665L.151C

Abstract

We have serendipitously discovered a previously unknown, bright source (BT=11.75+/-0.07 mag) with a very blue VT-Ks color, which we have named Albus 1. A photometric and astrometric study using Virtual Observatory tools has shown that it possesses an appreciable proper motion and magnitudes and colors very similar to those of the well-known white dwarf G191-B2B. We consider Albus 1 as a DA-type white dwarf located at about 40 pc. If its nature is confirmed, Albus 1 would be the sixth brightest isolated white dwarf in the sky, which would make it an excellent spectrophotometric standard.
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