Albus 1: A very bright white dwarf candidate

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We have serendipitously discovered a previously-unknown, bright source (B_T = 11.75+/-0.07 mag) with a very blue V_T-K_s color, to 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 G 191-B2B. We consider Albus 1 as a DA-type white dwarf located at about 40 pc. If confirmed its nature, Albus 1 would be the sixth brightest isolated white dwarf in the sky, which would make it an excellent spectrophotometric standard.
ApJ Letters, in press

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Astrophysics

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http://salesiana.dossiersoluciones.com/handle/123456789/134404

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0707.1343
 http://arxiv.org/abs/0707.1343

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arXiv