Abstract
In the solar corona waves and oscillatory activities are observed with modern imaging and spectral instruments. These oscillations are interpreted as slow magneto-acoustic waves excited impulsively in coronal loops. This study explores the effect of steady plasma flow on the dissipation of slow magneto-acoustic waves in the solar coronal loops permeated by uniform magnetic field. We have investigated the damping of slow waves in the coronal plasma taking into account viscosity and thermal conductivity as dissipative processes. On solving the dispersion relation it is found that the presence of plasma flow influences the characteristics of wave propagation and dissipation. We have shown that the time damping of slow waves exhibits varying behavior depending upon the physical parameters of the loop. The wave energy flux associated with slow magnetoacoustic waves turns out to be of the order of 106 erg cm−2 s−1 which is high enough to replace the energy lost through optically thin coronal emission and the thermal conduction below to the transition region.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
N Kumar P Kumar and S Singh Astron. Astrophys. 453 1067 (2006)
R Soler, R Oliver and J L Ballester Astrophys. J. 684 725 (2008)
L Ofman, M Romoli, G Poletto, G Noci and J L Kohl Astrophys. J. 491 L111 (1997)
C E DeForest and J B Gurman Astrophys. J. 501 L217 (1998)
I De Moortel, A W Hood, J Ireland and R W Walsh Solar. Phys. 209 89 (2002)
J T Mariska Astrophys. J. 639 484 (2006)
R Ogrodowczyk, K Murawski and S K Solanki Astron. Astrophys. 495 313 (2009)
I De Moortel and A W Hood Astron. Astrophys. 408 755 (2003)
M P McEwan and I De Moortel Astron. Astrophys. 448 763 (2006)
R Ogrodowczyk and K Murawski Astron. Astrophys. 467 311 (2007)
N Kumar, P Kumar, S Singh and A Kumar J. Astrophys. Astron 29 243 (2008)
V M Nakariakov, D Tsiklauri, A Kelly, T D Arber and M J Aschwanden Astron. Astrophys. 414 25 (2004)
M Selwa, K Murawski and S K Solanki Astron. Astrophys. 435 701 (2005)
M Selwa, L Ofman and K Murawski Astrophys. J. 668 L83 (2007)
R G Athay and D P Dere Astrophys. J. 381 323 (1991)
A R Winebarger, H Warren, A van Ballegooijen, E E DeLuca and L Golub Astrophys. J. 567 L89 (2002)
A H Gabriel, F Bely-Dubau and P Lemaire Astrophys. J. 589 623 (2003)
V M Nakariakov and B Roberts Solar. Phys. 159 399 (1995)
M Terra-Homem, R Erdélyi and I Ballai Solar. Phys. 217 199 (2003)
E R Priest Solar Magnetohydrodynamics (Dordrecht: Reidel) (1982)
T J Wang, S K Solanki, D E Innes, W Curdt and E Marsch Astron. Astrophys. 402 L17 (2003)
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Kumar, N., Kumar, P., Kumar, A. et al. Role of equilibrium plasma flow on damping of slow MHD waves. Indian J Phys 85, 1879–1886 (2011). https://doi.org/10.1007/s12648-011-0191-7
Published:
Issue Date:
DOI: https://doi.org/10.1007/s12648-011-0191-7