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American Astronomical Society, Astrophysical Journal, 1(779), p. 82, 2013

DOI: 10.1088/0004-637x/779/1/82

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Characteristics of transverse waves in chromospheric mottles

Journal article published in 2013 by D. Kuridze, G. Verth, M. Mathioudakis, R. Erdélyi, D. B. Jess ORCID, R. J. Morton ORCID, D. J. Christian ORCID, F. P. Keenan
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

Using data obtained by the high temporal and spatial resolution Rapid Oscillations in the Solar Atmosphere (ROSA) instrument on the Dunn Solar Telescope, we investigate at an unprecedented level of detail transverse oscillations in chromospheric fine structures near the solar disk center. The oscillations are interpreted in terms of propagating and standing magnetohydrodynamic kink waves. Wave characteristics including the maximum transverse velocity amplitude and the phase speed are measured as a function of distance along the structure's length. Solar magneto-seismology is applied to these measured parameters to obtain diagnostic information on key plasma parameters (e.g., magnetic field, density, temperature, flow speed) of these localised waveguides. The magnetic field strength of the mottle along the $∼$2 Mm length is found to decrease by a factor of 12, while the local plasma density scale height is $∼280±$80 km. ; Comment: 8 pages, 7 figures, accepted in ApJ