Browsing by Author "Nicholls, C.P."

Now showing items 1-4 of 4

    • Ellipsoidal variability and the difference between sequence D and E red giants 

      Nicholls, C.P.; Wood, P.R.; Cioni, M-R.L. (2010)
      We have studied a sample of Large Magellanic Cloud red giant binaries that lie on sequence E in the period–luminosity plane. We show that their combined light and velocity curves unambiguously demonstrate that they are ...

    • Long secondary periods in variable red giants 

      Nicholls, C.P.; Wood, P.R.; Cioni, M-R.L.; Soszynski, I. (2009)
      We present a study of a sample of Large Magellanic Cloud red giants exhibiting Long Secondary Periods (LSPs). We use radial velocities obtained from VLT spectral observations and MACHO and OGLE light curves to examine ...

    • New results on long secondary periods in red giants 

      Nicholls, C.P.; Wood, P.R.; Cioni, M-R.L.; Soszynski, I. (2009)
      Approximately 30% of variable red giants have light curves which show a Long Secondary Period (LSP) in addition to their primary oscillation. No model has been proposed that can satisfactorily explain the LSPs. Here we ...

    • New results on long secondary periods in red giants 

      Nicholls, C.P.; Wood, P.R.; Cioni, M-R.L.; Soszynski, I. (2009)
      Approximately 30% of variable red giants have light curves which show a Long Secondary Period (LSP) in addition to their primary oscillation. No model has been proposed that can satisfactorily explain the LSPs. Here we ...