Albus 1: A very bright white dwarf candidate

Details Albus 1: A very bright white dwarf candidate Albus 1: A very bright white dwarf candidate

2007-07-09

arxiv.org/abs/0707.1343v1

Astronomy and Astrophysics

Astrophysics

ApJ Letters, in press

Scientific paper

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.

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