scholarly journals Stability of Dense Stellar Clusters against Relativistic Collapse. II. Maxwellian Distribution Functions with Different Cutoff Parameters

1998 ◽  
Vol 500 (1) ◽  
pp. 217-232 ◽  
Author(s):  
G. S. Bisnovatyi‐Kogan ◽  
M. Merafina ◽  
R. Ruffini ◽  
E. Vesperini
Keyword(s):  
Distribution Functions ◽  
Maxwellian Distribution ◽  
Stellar Clusters ◽  
Relativistic Collapse

scholarly journals Measuring heat flux from collective Thomson scattering with non-Maxwellian distribution functions

2019 ◽  
Vol 26 (3) ◽  
pp. 032104 ◽  
Author(s):  
R. J. Henchen ◽  
M. Sherlock ◽  
W. Rozmus ◽  
J. Katz ◽  
P. E. Masson-Laborde ◽  
...  
Keyword(s):  
Heat Flux ◽  
Thomson Scattering ◽  
Distribution Functions ◽  
Maxwellian Distribution ◽  
Collective Thomson Scattering

Stability of dense stellar clusters against relativistic collapse

1993 ◽  
Vol 414 ◽  
pp. 187 ◽  
Author(s):  
G. S. Bisnovatyj-Kogan ◽  
M. Merafina ◽  
R. Ruffini ◽  
E. Vesperini
Keyword(s):  
Stellar Clusters ◽  
Relativistic Collapse

Effects of Landau Damping and Collision on Stimulated Raman Scattering with Various Phase-Space Distributions

2021 ◽  
Author(s):  
Shanxiu XIE ◽  
Yong CHEN ◽  
Junchen YE ◽  
Yugu CHEN ◽  
Na PENG ◽  
...  
Keyword(s):  
Growth Rate ◽  
Raman Scattering ◽  
Stimulated Raman Scattering ◽  
Deep Understanding ◽  
Distribution Functions ◽  
Maxwellian Distribution ◽  
Landau Damping ◽  
Hot Electron ◽  
Collisional Damping ◽  
Stimulated Raman

Abstract Stimulated Raman scattering (SRS) is one of the main instabilities affecting the success of the fusion ignition. Here, we study the relationship between Raman growth and Landau damping with various distribution functions combining the analytic formulas and Vlasov simulations. The Landau damping obtained by Vlasov-Poisson simulation and Raman growth rate obtained by Vlasov-Maxwell simulation are anti-correlated, which is consistent with our theoretical analysis quantitatively. Maxwellian distribution, flattened distribution, and bi-Maxwellian distribution are studied in detail, which represent three typical stages of SRS. We have also demonstrated the effects of plateau width, hot-electron fraction, hot-to-cold electron temperature ratio, and collisional damping on the Landau damping and growth rate. It gives us a deep understanding of SRS and possible ways to mitigate SRS through manipulating distribution functions to a high Landau damping regime.

Weibel instability with non-Maxwellian distribution functions

2007 ◽  
Vol 14 (2) ◽  
pp. 022108 ◽  
Author(s):  
S. Zaheer ◽  
G. Murtaza
Keyword(s):  
Distribution Functions ◽  
Maxwellian Distribution ◽  
Weibel Instability

On the structure of stellar clusters after relaxation

1966 ◽  
Vol 25 ◽  
pp. 146-154 ◽  
Author(s):  
S. von Hoerner
Keyword(s):  
Globular Clusters ◽  
Virial Theorem ◽  
Body Problem ◽  
Central Core ◽  
Maxwellian Distribution ◽  
Stellar Clusters ◽  
Time Intervals ◽  
Starting Conditions ◽  
Close Pairs

The evolution of globular clusters is studied by means ofN-body problem calculations with 16 and 25 stars for time intervals up to 40 times of relaxation. It is found that within two to four times of relaxation all clusters with different starting conditions approach an isothermal polytrope and a Maxwellian distribution of velocities. In much longer times the deviations from an isothermal polytrope and a Maxwellian distribution of velocities become very important. A cusp is formed near the center of the cluster, but no central core can be distinguished. There is an excess of small and large velocities; the excess of high velocities is due to the formation of close pairs near the center. The escaping stars are fewer by a factor of 5. The virial theorem and Chandrasekhar's time of relaxation are approximately verified. Some other results are also discussed.

Non-Maxwellian distribution functions in flaring coronal loops. Comparison of Landau-Fokker-Planck and BGK solutions

Solar Physics ◽  
1988 ◽  
Vol 117 (1) ◽  
pp. 123-133 ◽  
Author(s):  
N. N. Ljepojevic ◽  
P. MacNeice
Keyword(s):  
Distribution Functions ◽  
Maxwellian Distribution ◽  
Coronal Loops ◽  
Fokker Planck

Effect of reaction heat on Maxwellian distribution functions and rate of reactions

2007 ◽  
Vol 2007 (12) ◽  
pp. P12003-P12003 ◽  
Author(s):  
Gilberto M Kremer ◽  
Ana Jacinta Soares
Keyword(s):  
Distribution Functions ◽  
Maxwellian Distribution ◽  
Reaction Heat

Relativistic collapse of stellar clusters after loss of stability

1988 ◽  
Vol 147 (1) ◽  
pp. 121-135 ◽  
Author(s):  
G. S. Bisnovatyi-Kogan ◽  
L. R. Yangurazova
Keyword(s):  
Loss Of Stability ◽  
Stellar Clusters ◽  
Relativistic Collapse
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