### Abstract

The influence of dust rotation on the growing of dust-ion acoustic surface waves is investigated in a sharply bounded astrophysical dusty plasma containing the non-spherical dust grains and non-thermal electrons whose velocity distribution function takes the form of the generalized (r, q) distribution function, where r and q are the two spectral indices for the generalized distribution function. We assume that the angular frequency of the rotating non-spherical dust grains is close to the wave frequency to derive the resonant growth rate of the surface wave. The result shows that the surface wave becomes more unstable as the rotation frequency is increasing. If the rotation frequency is too low, the instability disappears in the domain of high wave numbers. We also have found that growth rate decreases as the moment of inertia of the rotating dust grains increases in astrophysical non-thermal plasmas.

Original language | English |
---|---|

Pages (from-to) | 30-34 |

Number of pages | 5 |

Journal | Astroparticle Physics |

Volume | 114 |

DOIs | |

State | Published - 2020 Jan 1 |

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### Keywords

- Astrophysical dusty plasma
- Dust rotation
- Resonant instability
- Surface wave

### Cite this

*Astroparticle Physics*,

*114*, 30-34. https://doi.org/10.1016/j.astropartphys.2019.06.004

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*Astroparticle Physics*, vol. 114, pp. 30-34. https://doi.org/10.1016/j.astropartphys.2019.06.004

**Influence of non-spherical dust grains on the growing of astrophysical dusty plasma waves with (r, q) distribution function.** / Lee, Myoung-Jae; Ashikawa, Naoko; Jung, Young Dae.

Research output: Contribution to journal › Article › Research › peer-review

TY - JOUR

T1 - Influence of non-spherical dust grains on the growing of astrophysical dusty plasma waves with (r, q) distribution function

AU - Lee, Myoung-Jae

AU - Ashikawa, Naoko

AU - Jung, Young Dae

PY - 2020/1/1

Y1 - 2020/1/1

N2 - The influence of dust rotation on the growing of dust-ion acoustic surface waves is investigated in a sharply bounded astrophysical dusty plasma containing the non-spherical dust grains and non-thermal electrons whose velocity distribution function takes the form of the generalized (r, q) distribution function, where r and q are the two spectral indices for the generalized distribution function. We assume that the angular frequency of the rotating non-spherical dust grains is close to the wave frequency to derive the resonant growth rate of the surface wave. The result shows that the surface wave becomes more unstable as the rotation frequency is increasing. If the rotation frequency is too low, the instability disappears in the domain of high wave numbers. We also have found that growth rate decreases as the moment of inertia of the rotating dust grains increases in astrophysical non-thermal plasmas.

AB - The influence of dust rotation on the growing of dust-ion acoustic surface waves is investigated in a sharply bounded astrophysical dusty plasma containing the non-spherical dust grains and non-thermal electrons whose velocity distribution function takes the form of the generalized (r, q) distribution function, where r and q are the two spectral indices for the generalized distribution function. We assume that the angular frequency of the rotating non-spherical dust grains is close to the wave frequency to derive the resonant growth rate of the surface wave. The result shows that the surface wave becomes more unstable as the rotation frequency is increasing. If the rotation frequency is too low, the instability disappears in the domain of high wave numbers. We also have found that growth rate decreases as the moment of inertia of the rotating dust grains increases in astrophysical non-thermal plasmas.

KW - Astrophysical dusty plasma

KW - Dust rotation

KW - Resonant instability

KW - Surface wave

UR - http://www.scopus.com/inward/record.url?scp=85067861291&partnerID=8YFLogxK

U2 - 10.1016/j.astropartphys.2019.06.004

DO - 10.1016/j.astropartphys.2019.06.004

M3 - Article

VL - 114

SP - 30

EP - 34

JO - Astroparticle Physics

JF - Astroparticle Physics

SN - 0927-6505

ER -