Damping of Linear Nonadiabatic MHD Waves in a Flowing Prominence Medium
We study the effect of shear flow on the time damping of linear nonadiabatic magnetoacoustic waves in a solar prominence. We consider a homogeneous, isothermal, and unbounded medium permeated by a uniform magnetic field. The adiabaticity is removed by including the optically thin radiative losses, t...
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| Format: | Article |
| Language: | English |
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Wiley
2014-01-01
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| Series: | Advances in Astronomy |
| Online Access: | http://dx.doi.org/10.1155/2014/541376 |
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| author | Nagendra Kumar Anil Kumar Himanshu Sikka Pradeep Kumar |
| author_facet | Nagendra Kumar Anil Kumar Himanshu Sikka Pradeep Kumar |
| author_sort | Nagendra Kumar |
| collection | DOAJ |
| description | We study the effect of shear flow on the time damping of linear nonadiabatic magnetoacoustic waves in a solar prominence. We consider a homogeneous, isothermal, and unbounded medium permeated by a uniform magnetic field. The adiabaticity is removed by including the optically thin radiative losses, thermal conduction, and heating term in energy equation. We present a local theory of MHD waves to obtain a dispersion relation. The dispersion relation is solved numerically to study the time damping of these waves. It is found that flow influences the damping time and damping per period of both the slow and fast waves significantly. Damping time and damping per period of slow waves are very much higher than the damping time and damping per period of fast waves. |
| format | Article |
| id | doaj-art-21369136c53c4dc9a229e546779a1bf2 |
| institution | Kabale University |
| issn | 1687-7969 1687-7977 |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Astronomy |
| spelling | doaj-art-21369136c53c4dc9a229e546779a1bf22025-02-03T05:57:40ZengWileyAdvances in Astronomy1687-79691687-79772014-01-01201410.1155/2014/541376541376Damping of Linear Nonadiabatic MHD Waves in a Flowing Prominence MediumNagendra Kumar0Anil Kumar1Himanshu Sikka2Pradeep Kumar3Department of Mathematics, M.M.H. College, Ghaziabad 201001, Uttar Pradesh, IndiaDepartment of Mathematics, Maharaja Agrasen Institute of Technology, Rohini 110086, Delhi, IndiaDepartment of Mathematics, Maharaja Agrasen Institute of Technology, Rohini 110086, Delhi, IndiaDepartment of Physics, K.G.K (P.G.) College, Moradabad 244001, Uttar Pradesh, IndiaWe study the effect of shear flow on the time damping of linear nonadiabatic magnetoacoustic waves in a solar prominence. We consider a homogeneous, isothermal, and unbounded medium permeated by a uniform magnetic field. The adiabaticity is removed by including the optically thin radiative losses, thermal conduction, and heating term in energy equation. We present a local theory of MHD waves to obtain a dispersion relation. The dispersion relation is solved numerically to study the time damping of these waves. It is found that flow influences the damping time and damping per period of both the slow and fast waves significantly. Damping time and damping per period of slow waves are very much higher than the damping time and damping per period of fast waves.http://dx.doi.org/10.1155/2014/541376 |
| spellingShingle | Nagendra Kumar Anil Kumar Himanshu Sikka Pradeep Kumar Damping of Linear Nonadiabatic MHD Waves in a Flowing Prominence Medium Advances in Astronomy |
| title | Damping of Linear Nonadiabatic MHD Waves in a Flowing Prominence Medium |
| title_full | Damping of Linear Nonadiabatic MHD Waves in a Flowing Prominence Medium |
| title_fullStr | Damping of Linear Nonadiabatic MHD Waves in a Flowing Prominence Medium |
| title_full_unstemmed | Damping of Linear Nonadiabatic MHD Waves in a Flowing Prominence Medium |
| title_short | Damping of Linear Nonadiabatic MHD Waves in a Flowing Prominence Medium |
| title_sort | damping of linear nonadiabatic mhd waves in a flowing prominence medium |
| url | http://dx.doi.org/10.1155/2014/541376 |
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