Bibcode
Henney, C. J.; Ulrich, R. K.; Bertello, L.; Bogart, R. S.; Bush, R. I.; Scherrer, P. H.; Palle, P. L.; Roca Cortes, T.; Turck-Chieze, S.
Referencia bibliográfica
American Astronomical Society, 194th AAS Meeting, #56.17; Bulletin of the American Astronomical Society, Vol. 31, p.914
Advertised on:
9
1999
Número de citas
1
Número de citas referidas
1
Descripción
We present a comparison of the velocity power spectra between the GOLF
and MDI instruments. In addition, this poster outlines work towards
creating a GOLF-simulated signal utilizing MDI velocity images. The
simulation of the GOLF signal is achieved by integrating spatially
weighted masks with MDI LOI-proxy velocity images. The GOLF-simulated
signal and a selection of additional spatially masked MDI velocity
signals are compared with the observed GOLF signal for a 759 day period
from May 25, 1996 through June 22, 1998. Ultimately, a cross-analysis
process between GOLF and MDI signals could lead to an enhancement of our
ability to detect low frequency solar oscillations. The
signal-to-background ratio (S/B) for the GOLF and the spatially masked
MDI velocity data is presented for low degree (l <= 3) and low
frequency p-modes. We find that signals from both MDI and GOLF are
beneficial for detecting low degree (l <= 3) and low frequency (<
2000 mu Hz) p-modes. For the frequency range and the signals compared in
this poster, the GOLF signal has the highest S/B for l=0 p-modes. The
S/B of the GOLF and MDI central region masked signals is good for
detecting l=1 p-modes. For l >= 2 p-modes, the central region masked
signals have the highest S/B of the power spectra compared here. In
addition, the S/B of the preliminary GOLF-simulated signal is found to
be more similar to the GOLF signal than the MDI LOI-proxy signal without
spatial masking for the modes investigated here.