Temporal changes in the frequencies and widths of the solar p-mode oscillations

被引：12

作者：

Rhodes, E. J., Jr. ^{[1
,2
]}

Reiter, J. ^{[3
]}

Schou, J. ^{[4
]}

Larson, T. ^{[4
]}

Scherrer, P. ^{[4
]}

Brooks, J. ^{[1
]}

McFaddin, P. ^{[1
]}

Miller, B. ^{[1
]}

Rodriguez, J. ^{[1
]}

Yoo, J. ^{[1
]}

机构：

[1] Univ Southern Calif, Dept Phys & Astron, Los Angeles, CA 90089 USA

[2] Jet Prop Lab, Space Phys Res Element, Pasadena, CA 91101 USA

[3] Tech Univ Munich, Zentrum Math, D-80333 Munich, Germany

[4] Stanford Univ, Dept Phys, HEPL 4085, Stanford, CA 94305 USA

来源：

GONG-SOHO 24: A NEW ERA OF SEISMOLOGY OF THE SUN AND SOLAR-LIKE STARS | 2011年 / 271卷

关键词：

VELOCITY;

D O I：

10.1088/1742-6596/271/1/012029

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present a study of the temporal changes in the sensitivities of the frequencies and widths of the solar p-mode oscillations to corresponding changes in the levels of solar activity during Solar Cycle 23. From MDI and GONG++ full-disk Dopplergram three-day time series obtained between 1996 and 2008 we have computed a total of 221 sets of m-averaged power spectra for spherical harmonic degrees ranging up to 1000. We have then fit these 221 sets of m-averaged power spectra using our WMLTP fitting code and both symmetric Lorentzian profiles for the peaks as well as the asymmetric profile of Nigam and Kosovichev to obtain 442 tables of p-mode parameters. We then inter-compared these 442 tables which comprise in excess of 5.3 million p-mode parameters, and we performed linear regression analyses of the differences in p-mode frequencies and widths as functions of the differences in as many as ten different solar activity indices. From these linear regression analyses we have discovered new signatures of the frequency shifts of the p-modes and a similar, but slightly different, signature of the temporal shifts in the widths of the oscillations.

引用

页数：5

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