Skip to the content

Wide-spectrum slow magnetoacoustic waves in coronal loops

Tsiklauri, D and Nakariakov, VM 2001, 'Wide-spectrum slow magnetoacoustic waves in coronal loops' , Astronomy and Astrophysics, 379 (3) , pp. 1106-1112.

[img]
Preview
PDF (Publisher version)
Download (190kB) | Preview

    Abstract

    A model interpreting variations of EUV brightness upward propagating in solar coronal loops as slow magnetoacoustic waves is developed. A loop is considered to have a non-zero plane inclination angle and offset of the circular loop centre from the baseline. The model also incorporates effects of dissipation and gravitational stratification. A linear evolutionary equation is derived and applied to investigations of slow wave dynamics. Both the non-zero plane inclination and the offset decrease the growth of the wave amplitude due to stratification. It is shown that wide-spectrum slow magnetoacoustic waves, consistent with currently available observations in the low frequency part of the spectrum, can provide a rate of heat deposition sufficient to heat the loop. In this scenario, the heat would be deposited near the loop footpoints, which agrees with the current observational data.

    Item Type: Article
    Uncontrolled Keywords: Magnetohydrodynamics MHD waves, sun: activity, sun: corona, sun: oscillations, sun: UV radiation
    Themes: Subjects / Themes > Q Science > QB Astronomy
    Subjects outside of the University Themes
    Schools: Colleges and Schools > College of Science & Technology
    Colleges and Schools > College of Science & Technology > School of Computing, Science and Engineering
    Journal or Publication Title: Astronomy and Astrophysics
    Publisher: EDP Sciences
    Refereed: Yes
    ISSN: 00046361
    Depositing User: H Kenna
    Date Deposited: 03 Sep 2007 15:48
    Last Modified: 20 Aug 2013 16:47
    URI: http://usir.salford.ac.uk/id/eprint/385

    Actions (login required)

    Edit record (repository staff only)

    Downloads per month over past year

    View more statistics