Rotation Of The Deep Solar Interior From A Solar Cycle Of Gong Data

Details Rotation Of The Deep Solar Interior From A Solar Cycle Of Gong Data Rotation Of The Deep Solar Interior From A Solar Cycle Of Gong Data

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...210.2219l&link_type=abstract

American Astronomical Society Meeting 210, #22.19; Bulletin of the American Astronomical Society, Vol. 39, p.127

Astronomy and Astrophysics

Astronomy

Scientific paper

We use 3960 days of Global Oscillation Network Group (GONG) data to derive the rotation of the deep solar interior. We obtain the splitting of low signal-to-noise multiplets - at low radial order and low spherical harmonic degree - using the m-averaged spectra - a technique that works well even when none of the individual-m spectra are clean enough to be fit. Central frequencies and rotational splittings are estimated down to l = 1 and 1 mHz. We illustrate here the validity of our method and infer the radial rotation profile down to 0.2 solar radius.
This work utilizes data obtained by the Global Oscillation Network Group (GONG) program, managed by the National Solar Observatory, which is operated by AURA, Inc. under a cooperative agreement with the National Science Foundation. The data were acquired by instruments operated by the Big Bear Solar Observatory, High Altitude Observatory, Learmonth Solar Observatory, Udaipur Solar Observatory, Instituto de Astrofisica de Canarias, and Cerro Tololo Interamerican Observatory.

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