Projects per year
Abstract
ABSTRACT 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-1, 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-1
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.
Original language | English |
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Pages (from-to) | 162-166 |
Number of pages | 5 |
Journal | Royal Astronomical Society. Monthly Notices |
Volume | 411 |
Issue number | 1 |
Early online date | 28 Oct 2010 |
DOIs | |
Publication status | Published - 1 Feb 2011 |
Bibliographical note
The definitive version is available at www.blackwell-synergy.comKeywords
- techniques: photometric
- stars: oscillations
- Be
- asteroseismology
- stars: activity
- stars: individual: Achernar
- stars: emission-line
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Dive into the research topics of 'Variations of the amplitudes of oscillation of the Be star Achernar'. Together they form a unique fingerprint.Projects
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Birmingham Astrophysics - Rolling Grant 2007-2012
Ponman, T., Cruise, M., Freise, A., Raychaudhury, S., Smith, G., Speake, C., Stevens, I. & Vecchio, A.
SCIENCE & TECHNOLOGY FACILITIES COUNCIL
1/04/07 → 31/03/12
Project: Research Councils