Damping of Fast Magnetohydrodynamic Oscillations in Quiescent Filament Threads

Bibcode
2009ASPC..415...71A
Arregui, I.; Terradas, J.; Oliver, R.; Ballester, J. L.
Bibliographical reference

The Second Hinode Science Meeting: Beyond Discovery-Toward Understanding ASP Conference Series, Vol. 415, proceedings of a meeting held 29 September through 3 October 2008 at the National Center for Atmospheric Research, Boulder, Colorado, USA. Edited by B. Lites, M. Cheung, T. Magara, J. Mariska, and K. Reeves. San Francisco: Astronomical Society of the Pacific, 2009, p.71

Advertised on:
12
2009
Number of authors
4
IAC number of authors
0
Citations
0
Refereed citations
0
Description
High-resolution observations provide evidence of the existence of small-amplitude transverse oscillations in solar filament fine structures. These oscillations are believed to represent fast magnetohydrodynamic (MHD) waves and the disturbances are seen to be damped in short timescales of the order of 1 to 4 periods. We propose that, due to the highly inhomogeneous nature of the filament plasma at the fine-structure spatial scale, the phenomenon of resonant absorption is likely to operate in the temporal attenuation of fast MHD oscillations. By considering transverse inhomogeneity in a straight flux tube model we find that, for density inhomogeneities typical of filament threads, the decay times are of a few oscillatory periods only.
Type
Non-refereed

It may interest you

  • Non-refereed
    ANDES, the high resolution spectrograph for the ELT: science goals, project overview, and future developments
    The first generation of ELT instruments includes an optical-infrared high resolution spectrograph, indicated as ELT-HIRES and recently christened ANDES (ArmazoNes high Dispersion Echelle Spectrograph). ANDES consists of three fibre-fed spectrographs ([U]BV, RIZ, YJH) providing a spectral resolution of ∼100,000 with a minimum simultaneous wavelength
    Marconi, A. et al.

    Advertised on:

    7
    2024
    Bibcode
    2024SPIE13096E..13M
    Citations
    1
  • Non-refereed
    An overview of the preliminary optical design of the European Solar Telescope (EST)
    The European Solar Telescope (EST) is a 4-m class-solar telescope that will become part of the next generation of groundbased facilities. Located at the "Observatorio del Roque de los Muchachos" in La Palma (Spain), it will be aimed to study the magnetic connectivity of the solar atmosphere with high spatial and temporal resolution. The EST optical
    Belío-Asin, Marta et al.

    Advertised on:

    8
    2024
    Bibcode
    2024SPIE13094E..2GB
    Citations
    0
  • Non-refereed
    ANDES, the high-resolution spectrograph for the ELT: UBV spectrograph preliminary design
    We present the design of the ANDES UBV module, the bluest spectrograph of the ANDES instrument. It is a fiber-fed high resolution, high stability spectrograph, which will be installed on the ELT-Nasmyth platform to minimize blue fibre losses from the focal plane to the spectrograph. In this paper we present the status of development of the
    Weber, Michael et al.

    Advertised on:

    7
    2024
    Bibcode
    2024SPIE13096E..4AW
    Citations
    0