The Solar Oscillations Investigation - Michelson Doppler Imager

@article{Scherrer1995TheSO,
  title={The Solar Oscillations Investigation - Michelson Doppler Imager},
  author={Philip H. Scherrer and Richard S. Bogart and Rock I. Bush and J. Todd Hoeksema and Alexander G. Kosovichev and Jesper Schou and William J. Rosenberg and Larry A. Springer and Theodore D. Tarbell and Alan M. Title and C. Jacob Wolfson and Igor Zayer and The Mdi Engineering Team},
  journal={Solar Physics},
  year={1995},
  volume={162},
  pages={129-188}
}
The Solar Oscillations Investigation (SOI) uses the Michelson Doppler Imager (MDI) instrument to probe the interior of the Sun by measuring the photospheric manifestations of solar oscillations. Characteristics of the modes reveal the static and dynamic properties of the convection zone and core. Knowledge of these properties will improve our understanding of the solar cycle and of stellar evolution. Other photospheric observations will contribute to our knowledge of the solar magnetic field… 

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References

SHOWING 1-10 OF 29 REFERENCES

The Five-Minute Oscillations on the Solar Surface

For readers who were not doing astronomy three decades ago, the contrast between then and now is hard to appreciate. Before the appearance of the epochal papers of Leighton et al. and of Ulrich, no

Rings and trumpets: three-dimensional power spectra of solar oscillations

When slices of characteristic trumpet surfaces visible in three-dimensional power spectra of the Doppler shifts observed on the solar surface are taken at constant temporal frequency, the cross

Solar structure from global studies of the 5-minute oscillation

High sensitivity Doppier spectroscopy of integral sunlight in the 769.9 nm line of neutral potassium reveals several equally spaced lines of Q > 1,000 centred on the well known period of 5 min. These

On the Relation between Photospheric Flow Fields and the Magnetic Field Distribution on the Solar Surface

Using the technique of local correlation tracking on a 28 minute time sequence of white-light images of solar granulation, the horizontal flow field on the solar surface is measured. The time series

Results from proton damage tests on the Michelson Doppler Imager CCD for SOHO

Protons from solar flares represent the major threat to the scientific performance of a CCD in the SOHO orbit at L1, decreasing CTE and thus non-uniformly degrading the MTF of the detector. Lattice

Measurements of high-frequency solar oscillation modes

The spatial-temporal spectrum of solar oscillations exhibits modelike structure at frequencies above the nominal photospheric acoustic cutoff of about 5.3 mHz. The linewidth and frequency of these

What are the observed high-frequency solar acoustic modes?

Jefferies et al. (1988) observe discrete peaks up to ≈7mHz in the power spectra of their intermediate degree solar intensity oscillation data obtained at South Pole. This is perhaps surprising since

On the feasibility of correlation tracking at moderate resolution

The SOUP experiment demonstrated that photospheric surface flows can be measured by correlation tracking of white-light intensity features at high resolution (November et al., 1987). In order to

Evidence of global circulation currents from solar-limb temperature variations

The temperature distribution in a turbulent rotating photosphere is non-spherical. Dimensional arguments for the Sun suggest that such a temperature modulation may have an amplitude ΔT≈ Tv2/Φ≈0.1 K,