TY - GEN
T1 - A survey of hot subdwarf pulsators in ω Cen
AU - Randal, S. K.
AU - Calamida, A.
AU - Fontaine, G.
AU - Green, E. M.
AU - Monelli, M.
AU - Alonso, M. L.
AU - Catelan, M.
AU - Bono, G.
AU - Dhillon, V. S.
AU - Marsh, T. R.
PY - 2013
Y1 - 2013
N2 - 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.
AB - 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.
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U2 - 10.1051/epjconf/20134304006
DO - 10.1051/epjconf/20134304006
M3 - Conference contribution
AN - SCOPUS:84875648281
SN - 9782759809691
T3 - EPJ Web of Conferences
BT - 40th Liege International Astrophysical Colloquium. Ageing Low Mass Stars
T2 - 40th Liege International Astrophysical Colloquium. Ageing Low Mass Stars: From Red Giants to White Dwarfs, LIAC 2012
Y2 - 9 July 2012 through 13 July 2012
ER -