- #1
shadi_s10
- 89
- 0
Dealing with CMB, people sometimes refer to the shift parameter;
R = \sqrt{\frac{\Omega^0_m}{\Omega^0_k}}sinh(\sqrt{\Omega^0_k}\int^{z_{dec}}_{0}{\frac{dz}{E(z)}})
I know that it is related to the position of the first acoustic peak, however, the amount is around 1.7.
What does this mean?!
does it mean without Dark Energy, the peak would be shifted 1.7 in the x-axis (the multipole moment) of the CMB anisotropy spectrum?!
To the right or left?!
I think it should be around l=100 or something, so does this mean without Dark Energy, the theory would show a CMB shift parameter shifted about 1.7? like 100\pm1.7?!
R = \sqrt{\frac{\Omega^0_m}{\Omega^0_k}}sinh(\sqrt{\Omega^0_k}\int^{z_{dec}}_{0}{\frac{dz}{E(z)}})
I know that it is related to the position of the first acoustic peak, however, the amount is around 1.7.
What does this mean?!
does it mean without Dark Energy, the peak would be shifted 1.7 in the x-axis (the multipole moment) of the CMB anisotropy spectrum?!
To the right or left?!
I think it should be around l=100 or something, so does this mean without Dark Energy, the theory would show a CMB shift parameter shifted about 1.7? like 100\pm1.7?!
Last edited: