Browsing by Author "Randal, S. K."

Now showing 1 - 1 of 1
  • Thumbnail Image
    Item
    A survey of hot subdwarf pulsators in ω Cen
    (2013) Randal, S. K.; Calamida, A.; Fontaine, G.; Green, E. M.; Monelli, M.; Alonso, M. L.; Catelan , Marcio; Bono, G.; Dhillon, V. S.; Marsh, T. R.
    We recently discovered an apparently new class of pulsating Extreme Horizontal Branch (EHB) star in ω Cen. Tightly clustered around ∼50,000 K, these H-rich sdO stars exhibit rapid, multi-periodic oscillations on a timescale of 100 s. While four such objects have been detected in ω Cen, no counterparts have yet been found among the field population. Conversely, the rapid sdB pulsators around 31,000 K that are well-studied in the Galactic field have yet to be found in a globular cluster. We discuss the implications of this and also report the discovery of a fifth EHB pulsator in ω Cen....