Supergranulation Velocity Field from the MDI (SOHO) Data
L. D. Parfinenko, V. I. Efremov, and A. A. Solovev
TL;DR
This paper analyzes long-term SOHO/MDI Doppler data to identify a stable 32-hour velocity mode associated with supergranulation, revealing its spatial and temporal characteristics in the quiet solar photosphere.
Contribution
It identifies a stable 32-hour oscillation mode in the solar photosphere that correlates with supergranulation, providing new insights into solar surface dynamics.
Findings
Detected a stable 32-hour velocity mode in Doppler data.
The spatial scale of oscillations matches supergranulation (~35 Mm).
Confirmed the 5-minute oscillation mode alongside the supergranulation mode.
Abstract
Long (up to 100 hours) time series of SOHO/MDI Doppler data are analyzed. The power spectrum of radial velocity time series in the quiet photosphere is observed to have, along with the known 5-min mode, a stable strong mode with a period of about 32 h, which is close to the supergranulation cell lifetime. The spatial distribution of the amplitudes of these oscillations also coincides with the characteristic size scale of supergranulation (~35 Mm).
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.