T. P. Larson

The Sun’s Large-Scale Flows I: Measurements of Differential Rotation & Torsional Oscillation

Sushant S. Mahajan, Lisa Upton, H. M. Antia, Sarbani Basu et autres

Abstract We have developed a comprehensive catalog of the variable differential rotation measured near the solar photosphere. This catalog includes measurements of these flows obtained using several techniques: direct Doppler, granule tracking, magnetic pattern tracking, global helioseismology, as well as both time-distance …

us, in, ru, fr (code pays fourni par la source)

The Sun’s Large-Scale Flows I: Measurements of Differential Rotation & Torsional Oscillation Solar Physics

Sushant S. Mahajan, Lisa Upton, H. M. Antia, Sarbani Basu et autres

Abstract We have developed a comprehensive catalog of the variable differential rotation measured near the solar photosphere. This catalog includes measurements of these flows obtained using several techniques: direct Doppler, granule tracking, magnetic pattern tracking, global helioseismology as well as both time-distance …

us, in, ru, fr (code pays fourni par la source)

A Method for the Estimation of f- and p-mode Parameters and Rotational Splitting Coefficients from Un-averaged Solar Oscillation Power Spectra

J. Reiter, E. J. Rhodes, А. Г. Косовичев, P. H. Scherrer et autres

Abstract We present a new methodology for the fitting of the peaks in solar oscillation power spectra that is equally well-suited for the estimation of low-, medium, and high-degree f- and p-mode parameters and frequency-splitting coefficients. The method can provide accurate input …

de, us (code pays fourni par la source)

The Efffect of Image Apodization on Global Mode Parameters and Rotational Inversions

T. P. Larson, J. Schou

A Method for the Estimation of p-Mode Parameters from Averaged Solar Oscillation Power Spectra

J. Reiter, А. Г. Косовичев, J. Schou, P. H. Scherrer et autres

A new fitting methodology is presented that is equally well suited for the estimation of low-, medium-, and high-degree mode parameters from m-averaged solar oscillation power spectra of widely differing spectral resolution. This method, which we call the "Windowed, MuLTiple-Peak, averaged-spectrum" or …

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Comparing the internal structure of the Sun during the cycle 23 and cycle 24 minima

Sarbani Basu, A.-M. Broomhall, W. J. Chaplin, Yvonne Elsworth et autres

de (code pays fourni par la source)

The torsional oscillation and the timing of the solar cycle: Is it maximum yet?

R. Brian Howe, J. Christensen‐Dalsgaard, F. Hill, R. Komm et autres

After the late start to Cycle 24 there are some indications that activity may have peaked as early as late 2011 and that the polar-field reversal has already occurred in the North. We use helioseismic measurements of the migrating zonal flow pattern …

dk, de (code pays fourni par la source)

Characterization of High-Degree Modes using MDI, HMI and GONG Data

S. G. Korzennik, A. Eff‐Darwich, T. P. Larson, M. C. Rabello‐Soares et autres

de (code pays fourni par la source)

ACCURATE CHARACTERIZATION OF HIGH-DEGREE MODES USING MDI OBSERVATIONS

S. G. Korzennik, M. C. Rabello‐Soares, J. Schou, T. P. Larson

We present the first accurate characterization of high-degree modes, derived using the best Michelson Doppler Imager (MDI) full-disk full-resolution data set available. A 90 day long time series of full-disk 2 arcsec pixel −1 resolution Dopplergrams was acquired in 2001, thanks to …

us (code pays fourni par la source)

Accurate characterization of high-degree modes using MDI data

S. G. Korzennik, M. C. Rabello‐Soares, J. Schou, T. P. Larson

We present the first accurate characterization of high-degree modes (i.e., ℓ up to 1000), using the best MDI full-disk full-resolution data set available (90-day long time series, acquired in 2001). The Dopplergrams were spatially decomposed using our best estimate of the image …

us, br (code pays fourni par la source)

THE HIGH-LATITUDE BRANCH OF THE SOLAR TORSIONAL OSCILLATION IN THE RISING PHASE OF CYCLE 24

R. Howe, J. Christensen‐Dalsgaard, F. Hill, R. Komm et autres

We use global heliseismic data from the Global Oscillation Network Group, the Michelson Doppler Imager on board the Solar and Heliospheric Observatory , and the Helioseismic and Magnetic Imager on board the Solar Dynamics Observatory , to examine the behavior, during the …

gb, us, dk (code pays fourni par la source)

Using Distortion of Global Mode Eigenfunctions to Estimate Large Scale Flows

J. Schou, M. F. Woodard, C. S. Baldner, T. P. Larson