A survey of hot subdwarf pulsators in ω Cen
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 counterpar...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
EDP Sciences
2013-03-01
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| Series: | EPJ Web of Conferences |
| Online Access: | http://dx.doi.org/10.1051/epjconf/20134304006 |
| _version_ | 1819349893862391808 |
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| author | Catelan M. Monelli M. Alonso M.L. Green E.M. Fontaine G. Calamida A. Randal S.K. Bono G. Dhillon V.S. Marsh T.R. |
| author_facet | Catelan M. Monelli M. Alonso M.L. Green E.M. Fontaine G. Calamida A. Randal S.K. Bono G. Dhillon V.S. Marsh T.R. |
| author_sort | Catelan M. |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-12-24T19:07:46Z |
| format | Article |
| id | doaj.art-4dbf9d6a4cae41058cd63cf1bb9a0047 |
| institution | Directory Open Access Journal |
| issn | 2100-014X |
| language | English |
| last_indexed | 2024-12-24T19:07:46Z |
| publishDate | 2013-03-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | EPJ Web of Conferences |
| spelling | doaj.art-4dbf9d6a4cae41058cd63cf1bb9a00472022-12-21T16:43:04ZengEDP SciencesEPJ Web of Conferences2100-014X2013-03-01430400610.1051/epjconf/20134304006A survey of hot subdwarf pulsators in ω CenCatelan M.Monelli M.Alonso M.L.Green E.M.Fontaine G.Calamida A.Randal S.K.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.http://dx.doi.org/10.1051/epjconf/20134304006 |
| spellingShingle | Catelan M. Monelli M. Alonso M.L. Green E.M. Fontaine G. Calamida A. Randal S.K. Bono G. Dhillon V.S. Marsh T.R. A survey of hot subdwarf pulsators in ω Cen EPJ Web of Conferences |
| title | A survey of hot subdwarf pulsators in ω Cen |
| title_full | A survey of hot subdwarf pulsators in ω Cen |
| title_fullStr | A survey of hot subdwarf pulsators in ω Cen |
| title_full_unstemmed | A survey of hot subdwarf pulsators in ω Cen |
| title_short | A survey of hot subdwarf pulsators in ω Cen |
| title_sort | survey of hot subdwarf pulsators in ω cen |
| url | http://dx.doi.org/10.1051/epjconf/20134304006 |
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