The Velocity And Magnetic Observations of the Sun (VAMOS) project: status and future prospects

Details The Velocity And Magnetic Observations of the Sun (VAMOS) project: status and future prospects The Velocity And Magnetic Observations of the Sun (VAMOS) project: status and future prospects

Jan 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001esasp.464..337s&link_type=abstract

In: Proceedings of the SOHO 10/GONG 2000 Workshop: Helio- and asteroseismology at the dawn of the millennium, 2-6 October 2000,

Astronomy and Astrophysics

Astronomy

7

Helioseismology, Instrumentation, Data Analysis

Scientific paper

The Velocity And Magnetic Observations of the Sun (VAMOS) is a project by the Solar group at the Osservatorio Astronomico di Capodimonte (OAC), to conduct a full-disk study of solar photospheric dynamics and longitudinal magnetic field. To reach this goal, VAMOS has developed a solar imager, based on the technology of the magneto-optical filter (MOF), to obtain high cadence observations of the Sun's intensity (I) and velocity (V) fluctuations, and longitudinal magnetic field (B) component at the photospheric level. The instrument, with two potassium vapour cells, became operational in May 1999, and it has been used for campaign observations since then. Data reduction software has been developed for both the Doppler images calibration and the V and I images spherical harmonic decomposition. Progress is underway to perform the B images calibration, and to improve the instrument stability. Currently, the science done by VAMOS deals with the analysis of power, phase difference and coherence l-v diagrams in the potassium resonance line.

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