Open AccessNew periodic variables from the Hipparcos epoch photometry
Author(s) -
Koen Chris,
Eyer Laurent
Publication year - 2002
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1046/j.1365-8711.2002.05150.x
Subject(s) - physics , photometry (optics) , epoch (astronomy) , statistic , astrophysics , statistics , galaxy , mathematics , stars
Two selection statistics are used to extract new candidate periodic variables from the epoch photometry of the Hipparcos catalogue. The primary selection criterion is a signal‐to‐noise ratio. The dependence of this statistic on the number of observations is calibrated using about 30 000 randomly permuted Hipparcos data sets. A significance level of 0.1 per cent is used to extract a first batch of candidate variables. The second criterion requires that the optimal frequency be unaffected if the data are de‐trended by low‐order polynomials. We find 2675 new candidate periodic variables, of which the majority (2082) are from the Hipparcos ‘unsolved’ variables. Potential problems with the interpretation of the data (e.g. aliasing) are discussed.