Anchors for the cosmic distance scale: the Cepheids U Sagittarii, CF Cassiopeiae, and CEab Cassiopeiae

@article{Majaess2013AnchorsFT,
  title={Anchors for the cosmic distance scale: the Cepheids U Sagittarii, CF Cassiopeiae, and CEab Cassiopeiae},
  author={D. Majaess and Giovanni Carraro and Christian Moni Bidin and Charles J Bonatto and Leonid N. Berdnikov and David D. Balam and M. Moyano and Luigi C. Gallo and David Gerald Turner and David Lane and W. Gieren and J. Borissova and Valery V. Kovtyukh and Yuri Beletsky},
  journal={Astronomy and Astrophysics},
  year={2013},
  volume={560},
  pages={22-29}
}
New and existing X-ray, UB V JHKsW(1−4), and spectroscopic observations were analyzed to constrain fundamental parameters for M 25, NGC 7790, and dust along their sight-lines. The star clusters are of particular importance because they host the classical Cepheids U Sgr, CF Cas, and the visual binary Cepheids CEa and CEb Cas. Precise results from the multiband analysis, in tandem with a comprehensive determination of the Cepheids’ period evolution (dP/dt) from ∼140 years of observations, helped… 

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