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Separate the Tensor Perturbation From the CMB Temperature Anisotropy Power Spectrum | | Wen Zhao
; Yang Zhang
; | | Date: |
26 Sep 2005 | | Subject: | astro-ph | | Abstract: | For studying the difference effect on the Cosmic Microwave Background Radiation (CMB) anisotropy spectrum by scalar and tensor perturbation, we define another function $A_{lm}$, which can reflect the effect of different magnetic quantum number $m$. For a given $l$, we find that the ratio relations of $A_{lm}$ is different for the scalar perturbation sources and tensor perturbation sources. This give a new way to directly separate the tensor perturbation from CMB anisotropy power spectrum. Applying this method to study the CMB anisotropy quadrupole observed by COBE, we find that this quadrupole is not generated by isotropy scalar perturbation, the contribute of tensor perturbation is obvious. We can also study the anisotropy of the scalar perturbation by measuring the values of $A_{lm}$ in different coordinate system. | | Source: | arXiv, astro-ph/0509753 | | Services: | Forum | Review | PDF | Favorites | |
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