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Proper Orthogonal Decomposition of Solar Photospheric Motions

descriptionPublicationkeyboard_double_arrow_right Article , Preprint , Conference object 03 Aug 2005Embargo end date: 01 Jan 2005 Italy English Publisher:American Physical Society (APS)Journal:Physical Review Letters, volume 95 (issn: 0031-9007, eissn: 1079-7114, Copyright policy )
Authors: VECCHIO A.; CARBONE V.; LEPRETI, Fabio; PRIMAVERA, Leonardo; SORRISO VALVO L.; VELTRI, Pierluigi; ALFONSI, Giancarlo; +1 Authors

doi: 10.1103/physrevlett.95.061102 , 10.48550/arxiv.astro-ph/0506641

pmid: 16090935

arXiv: astro-ph/0506641

handle: 20.500.11770/154240 , 20.500.11770/178673 , 20.500.11770/187616 , 20.500.11770/143005 , 20.500.11770/265632

Proper Orthogonal Decomposition of Solar Photospheric Motions

Abstract

The spatio-temporal dynamics of the solar photosphere is studied by performing a Proper Orthogonal Decomposition (POD) of line of sight velocity fields computed from high resolution data coming from the MDI/SOHO instrument. Using this technique, we are able to identify and characterize the different dynamical regimes acting in the system. Low frequency oscillations, with frequencies in the range 20-130 microHz, dominate the most energetic POD modes (excluding solar rotation), and are characterized by spatial patterns with typical scales of about 3 Mm. Patterns with larger typical scales of 10 Mm, are associated to p-modes oscillations at frequencies of about 3000 microHz.

8 figures in jpg in press on PRL

Country
Italy
Related Organizations
Keywords

Physics - Data Analysis, Statistics and Probability, Astrophysics (astro-ph), FOS: Physical sciences, VELOCITY-FIELDS, OSCILLATIONS, WAVE, Chaotic Dynamics (nlin.CD), Astrophysics, Nonlinear Sciences - Chaotic Dynamics, VELOCITY FIELDS, OSCILLATIONS, WAVE, Data Analysis, Statistics and Probability (physics.data-an)

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    popularity
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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
25
Top 10%
Top 10%
Top 10%
Green
Related to Research communities
NEANIAS Space Research Community