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Nature of Quiet Sun Oscillations Using Data from the Hinode, TRACE, and SOHO Spacecraft

Gupta, GR and Subramanian, S and Banerjee, D and Madjarska, MS and Doyle, JG (2012) Nature of Quiet Sun Oscillations Using Data from the Hinode, TRACE, and SOHO Spacecraft. In: SOLAR PHYSICS, 182 (1). pp. 67-86.

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Official URL: http://dx.doi.org/10.1007/s11207-012-0146-y

Abstract

We study the nature of quiet-Sun oscillations using multi-wavelength observations from TRACE, Hinode, and SOHO. The aim is to investigate the existence of propagating waves in the solar chromosphere and the transition region by analyzing the statistical distribution of power in different locations, e.g. in bright magnetic (network), bright non-magnetic and dark non-magnetic (inter-network) regions, separately. We use Fourier power and phase-difference techniques combined with a wavelet analysis. Two-dimensional Fourier power maps were constructed in the period bands 2 -aEuro parts per thousand 4 minutes, 4 -aEuro parts per thousand 6 minutes, 6 -aEuro parts per thousand 15 minutes, and beyond 15 minutes. We detect the presence of long-period oscillations with periods between 15 and 30 minutes in bright magnetic regions. These oscillations were detected from the chromosphere to the transition region. The Fourier power maps show that short-period powers are mainly concentrated in dark regions whereas long-period powers are concentrated in bright magnetic regions. This is the first report of long-period waves in quiet-Sun network regions. We suggest that the observed propagating oscillations are due to magnetoacoustic waves, which can be important for the heating of the solar atmosphere.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to SPRINGER, NETHERLANDS
Keywords: Chromosphere, quiet;Transition region;Oscillations;MHD waves
Department/Centre: Division of Physical & Mathematical Sciences > Joint Astronomy Programme
Depositing User: Francis Jayakanth
Date Deposited: 04 Jan 2013 11:52
Last Modified: 04 Jan 2013 11:52
URI: http://eprints.iisc.ac.in/id/eprint/45615

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