SIMBAD references

2009AJ....137.4598S - Astron. J., 137, 4598-4607 (2009/June-0)

Photometry of type II Cepheid candidates from the northern part of the All Sky Automated Survey.


Abstract (from CDS):

We have obtained VR photometry of 282 Cepheid variable star candidates from the northern part of the All Sky Automated Survey (ASAS). These together with data from the ASAS and the Northern Sky Variability Survey (NSVS) were used to redetermine the periods of the stars. We divided the stars into four groups based on location in a plot of mean color, <V-R>, versus period. Two of the groups fell within the region of the diagram containing known type II Cepheids and yielded 14 new highly probable type II Cepheids. The properties of the remaining stars in these two groups are discussed but their nature remains uncertain. Unexplained differences exist between the sample of stars studied here and a previous sample drawn from the NSVS by Akerlof et al. This suggests serious biases in the identification of variables in different surveys.

Abstract Copyright:

Journal keyword(s): Cepheids - stars: Population II

VizieR on-line data: <Available at CDS (J/AJ/137/4598): table1.dat table3.dat table2.dat>

Simbad objects: 285

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