What is the “Shift Parameter” in CMB calculations?
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Hey mate ^_^
For a while I've been trying to read and understand the BAOs of the CMB. Apparently there's a "Shift Parameter" that moves the location of the first peak (and thus effects all the harmonics that follow)....
It appears to be linked to the amount of Dark Energy, but I've never seen a lucid description of the physical reality behind it.....
#Be Brainly❤️
For a while I've been trying to read and understand the BAOs of the CMB. Apparently there's a "Shift Parameter" that moves the location of the first peak (and thus effects all the harmonics that follow)....
It appears to be linked to the amount of Dark Energy, but I've never seen a lucid description of the physical reality behind it.....
#Be Brainly❤️
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Hello mate here is your answer.
We consider the backward beam method of Buzbee & Carasso [Math. Comp.27, 237–267. 1973] for the numerical computation of parabolic problems for preceding times. The performance of this method is strongly influenced by the choice of a spectral shift parameter. Using logarithmic convexity arguments Buzbee & Carasso derived an expression for the optimal value for linear problems. The main concern of this paper is to illustrate that this expression can also be found and explained via the numerical stability analysis of the forward and backward recurrence involved.
Hope it helps you.
We consider the backward beam method of Buzbee & Carasso [Math. Comp.27, 237–267. 1973] for the numerical computation of parabolic problems for preceding times. The performance of this method is strongly influenced by the choice of a spectral shift parameter. Using logarithmic convexity arguments Buzbee & Carasso derived an expression for the optimal value for linear problems. The main concern of this paper is to illustrate that this expression can also be found and explained via the numerical stability analysis of the forward and backward recurrence involved.
Hope it helps you.
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