TY - JOUR
T1 - Variations of the amplitudes of oscillation of the Be star Achernar
AU - Goss, K.J.F.
AU - Karoff, C.
AU - Chaplin, W.J.
AU - Elsworth, Y.
AU - Stevens, I.R.
N1 - Copyright 2011 Elsevier B.V., All rights reserved.
PY - 2011/2/1
Y1 - 2011/2/1
N2 - We report on finding variations in amplitude of the two main oscillation frequencies found in the Be star Achernar, over a period of 5 yr. They were uncovered by analysing photometric data of the star from the Solar Mass Ejection Imager (SMEI) instrument. The two frequencies observed, 0.775 and 0.725 d , were analysed in detail and their amplitudes were found to increase and decrease significantly over the 5-yr period, with the amplitude of the 0.725 d frequency changing by up to a factor of 8. The nature of this event has yet to be properly understood, but the possibility of it being due to the effects of a stellar outburst or a stellar cycle are discussed.
AB - We report on finding variations in amplitude of the two main oscillation frequencies found in the Be star Achernar, over a period of 5 yr. They were uncovered by analysing photometric data of the star from the Solar Mass Ejection Imager (SMEI) instrument. The two frequencies observed, 0.775 and 0.725 d , were analysed in detail and their amplitudes were found to increase and decrease significantly over the 5-yr period, with the amplitude of the 0.725 d frequency changing by up to a factor of 8. The nature of this event has yet to be properly understood, but the possibility of it being due to the effects of a stellar outburst or a stellar cycle are discussed.
UR - https://www.scopus.com/pages/publications/78751693187
U2 - 10.1111/j.1365-2966.2010.17665.x
DO - 10.1111/j.1365-2966.2010.17665.x
M3 - Journal article
AN - SCOPUS:78751693187
SN - 0035-8711
VL - 411
SP - 162
EP - 166
JO - Royal Astronomical Society. Monthly Notices
JF - Royal Astronomical Society. Monthly Notices
IS - 1
ER -