Nature of Quiet Sun Oscillations Using Data from the Hinode, TRACE, and SOHO Spacecraft |
| |
Authors: | G R Gupta S Subramanian D Banerjee M S Madjarska J G Doyle |
| |
Institution: | 1. Indian Institute of Astrophysics, Koramangala, Bangalore, 560 034, India 2. Joint Astronomy Programme, Indian Institute of Science, Bangalore, 560 012, India 3. Max Planck Institute for Solar System Research, 37191, Katlenburg-Lindau, Germany 4. Armagh Observatory, College Hill, BT61 9DG, Armagh, N. Ireland
|
| |
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??C?4?minutes, 4??C?6?minutes, 6??C?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. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|