Amplitude modulation in δ Sct stars: statistics from an ensemble of Kepler targets
The results of a search for amplitude modulation of pulsation modes in 983 δ Sct stars, which have effective temperatures between 6400 ⩽ Teff ⩽ 10 000 K in the Kepler Input Catalogue and were continuously observed by the Kepler Space Telescope for 4 yr, are presented. A total of 603 δ Sct stars (61....
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EDP Sciences
2017-01-01
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Series: | EPJ Web of Conferences |
Online Access: | https://doi.org/10.1051/epjconf/201716003008 |
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doaj-51703f36e7734aa0ab2ace83824bd8052021-08-02T10:20:54ZengEDP SciencesEPJ Web of Conferences2100-014X2017-01-011600300810.1051/epjconf/201716003008epjconf_azores2017_03008Amplitude modulation in δ Sct stars: statistics from an ensemble of Kepler targetsBowman Dominic M.Kurtz Donald W.Breger MichelMurphy Simon J.Holdsworth Daniel L.The results of a search for amplitude modulation of pulsation modes in 983 δ Sct stars, which have effective temperatures between 6400 ⩽ Teff ⩽ 10 000 K in the Kepler Input Catalogue and were continuously observed by the Kepler Space Telescope for 4 yr, are presented. A total of 603 δ Sct stars (61.3 per cent) are found to exhibit at least one pulsation mode that varies significantly in amplitude over 4 yr. Furthermore, it is found that amplitude modulation is not restricted to a specific region within the classical instability strip in the HR diagram, therefore its cause is not necessarily dependent on stellar parameters such as Teff or log g. On the other hand, many δ Sct stars show constant pulsation amplitudes demonstrating that the cause of pulsational non-linearity in these stars is not well understood.https://doi.org/10.1051/epjconf/201716003008 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Bowman Dominic M. Kurtz Donald W. Breger Michel Murphy Simon J. Holdsworth Daniel L. |
spellingShingle |
Bowman Dominic M. Kurtz Donald W. Breger Michel Murphy Simon J. Holdsworth Daniel L. Amplitude modulation in δ Sct stars: statistics from an ensemble of Kepler targets EPJ Web of Conferences |
author_facet |
Bowman Dominic M. Kurtz Donald W. Breger Michel Murphy Simon J. Holdsworth Daniel L. |
author_sort |
Bowman Dominic M. |
title |
Amplitude modulation in δ Sct stars: statistics from an ensemble of Kepler targets |
title_short |
Amplitude modulation in δ Sct stars: statistics from an ensemble of Kepler targets |
title_full |
Amplitude modulation in δ Sct stars: statistics from an ensemble of Kepler targets |
title_fullStr |
Amplitude modulation in δ Sct stars: statistics from an ensemble of Kepler targets |
title_full_unstemmed |
Amplitude modulation in δ Sct stars: statistics from an ensemble of Kepler targets |
title_sort |
amplitude modulation in δ sct stars: statistics from an ensemble of kepler targets |
publisher |
EDP Sciences |
series |
EPJ Web of Conferences |
issn |
2100-014X |
publishDate |
2017-01-01 |
description |
The results of a search for amplitude modulation of pulsation modes in 983 δ Sct stars, which have effective temperatures between 6400 ⩽ Teff ⩽ 10 000 K in the Kepler Input Catalogue and were continuously observed by the Kepler Space Telescope for 4 yr, are presented. A total of 603 δ Sct stars (61.3 per cent) are found to exhibit at least one pulsation mode that varies significantly in amplitude over 4 yr. Furthermore, it is found that amplitude modulation is not restricted to a specific region within the classical instability strip in the HR diagram, therefore its cause is not necessarily dependent on stellar parameters such as Teff or log g. On the other hand, many δ Sct stars show constant pulsation amplitudes demonstrating that the cause of pulsational non-linearity in these stars is not well understood. |
url |
https://doi.org/10.1051/epjconf/201716003008 |
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