Comparison of subsurface sound-speed structures of three active regions

S. Couvidat; A. C. Birch; S. P. Rajaguru; A. G. Kosovichev

doi:10.1017/S1743921306001499

Comparison of subsurface sound-speed structures of three active regions

S. Couvidat
, A. C. Birch
, S. P. Rajaguru
, A. G. Kosovichev

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

We analyze three solar active regions observed with the MDI instrument onboard SoHO (Scherrer et al. 1995). We apply the time-distance helioseismology formalism to derive the travel times of acoustic waves propagating through these active regions. The inversion of these acoustic travel times gives us access to the 3D sound-speed structure below the sunspots. We compare the main characteristics of these inversion results as a function of the active region size and magnetic field strength.

Original language	English (US)
Pages (from-to)	75-76
Number of pages	2
Journal	Proceedings of the International Astronomical Union
Volume	2
Issue number	233
DOIs	https://doi.org/10.1017/S1743921306001499
State	Published - Mar 2006
Externally published	Yes

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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10.1017/S1743921306001499

Cite this

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title = "Comparison of subsurface sound-speed structures of three active regions",

abstract = "We analyze three solar active regions observed with the MDI instrument onboard SoHO (Scherrer et al. 1995). We apply the time-distance helioseismology formalism to derive the travel times of acoustic waves propagating through these active regions. The inversion of these acoustic travel times gives us access to the 3D sound-speed structure below the sunspots. We compare the main characteristics of these inversion results as a function of the active region size and magnetic field strength.",

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AU - Couvidat, S.

AU - Birch, A. C.

AU - Rajaguru, S. P.

AU - Kosovichev, A. G.

PY - 2006/3

Y1 - 2006/3

N2 - We analyze three solar active regions observed with the MDI instrument onboard SoHO (Scherrer et al. 1995). We apply the time-distance helioseismology formalism to derive the travel times of acoustic waves propagating through these active regions. The inversion of these acoustic travel times gives us access to the 3D sound-speed structure below the sunspots. We compare the main characteristics of these inversion results as a function of the active region size and magnetic field strength.

AB - We analyze three solar active regions observed with the MDI instrument onboard SoHO (Scherrer et al. 1995). We apply the time-distance helioseismology formalism to derive the travel times of acoustic waves propagating through these active regions. The inversion of these acoustic travel times gives us access to the 3D sound-speed structure below the sunspots. We compare the main characteristics of these inversion results as a function of the active region size and magnetic field strength.

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U2 - 10.1017/S1743921306001499

DO - 10.1017/S1743921306001499

M3 - Article

AN - SCOPUS:33750723090

SN - 1743-9213

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SP - 75

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JO - Proceedings of the International Astronomical Union

JF - Proceedings of the International Astronomical Union

IS - 233

ER -

Comparison of subsurface sound-speed structures of three active regions

Abstract

All Science Journal Classification (ASJC) codes

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