Asteroseismology of Red Giant stars

Details Asteroseismology of Red Giant stars Asteroseismology of Red Giant stars

2008-10-21

arxiv.org/abs/0810.3839v1

Astronomy and Astrophysics

Astrophysics

6 pages, 4 figures. Contribution to the Proceedings of the Wroclaw HELAS Workshop, 2008, to be published in Communications in

Scientific paper

Sun-like oscillations, that is p-modes excited stochastically by convective noise, have now been observed in a number of Red Giant stars. Compared to those seen in the Sun, these modes are of large amplitude and long period, making the oscillations attractive prospects for observation. However, the low Q-factor of these modes, and issues relating to the rising background at low frequencies, present some interesting challenges for identifying modes and determining the related asteroseismic parameters. We report on the analysis procedure adopted for peak-bagging by our group at Birmingham, and the techniques used to robustly ensure these are not a product of noise. I also show results from a number of giants extracted from multi-year observations with the SMEI instrument.

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