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A survey of hot subdwarf pulsators in ω Cen
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Montalbán, J., Randal, S. K., Calamida, A., Fontaine, G., Green, E. M., Monelli, M., Alonso, M. L., Catelan, M., Bono, G., Dhillon, V. S., Marsh, Tom, Noels, A. and Van Grootel, V. (2013) A survey of hot subdwarf pulsators in ω Cen. EPJ Web of Conferences, Volume 43 . Article number 04006. doi:10.1051/epjconf/20134304006 ISSN 2100-014X.
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Official URL: http://dx.doi.org/10.1051/epjconf/20134304006
Abstract
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.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
| Journal or Publication Title: | EPJ Web of Conferences | ||||
| Publisher: | EPJ | ||||
| ISSN: | 2100-014X | ||||
| Official Date: | 2013 | ||||
| Dates: |
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| Volume: | Volume 43 | ||||
| Number of Pages: | 6 | ||||
| Page Range: | Article number 04006 | ||||
| DOI: | 10.1051/epjconf/20134304006 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access |
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