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Browsing University of Hertfordshire by Author "Nicholls, C.P."
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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 ...