A comprehensive study of modulation effects on CMB polarization

Simple item page
dc.contributor.authorKothari, R
dc.date.accessioned2022-08-03T21:10:03Z
dc.date.available2022-08-03T21:10:03Z
dc.date.issued2022
dc.description.abstractThe Cosmic Microwave Background is characterized by temperature and linear polar ization fields. Dipole modulation in the temperature field has been extensively studied in the context of hemispherical power asymmetry. In this article, we show that a dipole modulation, and in general, any kind of modulation isn’t allowed in the E and B modes. This is the main result of this paper. This result explains why no evidence of modulation in E mode has been found in the literature. On the contrary, the linear polarization fields Q and U have no such restrictions. We show that modulation under certain situations can be thought of as local U(1) gauge transformations on the surface of a sphere. As far as the modulation function is concerned, we show that physical considerations enforce it to be (i) a spin 0 field and (ii) a scalar under parity. As mask ing is a specific type of modulation, our study suggests that a direct masking of E mode isn’t also possible. Masking in E map can only be applied through Q and U fields. This means that in principle, leaking of E and B mode powers into each other is unavoidableen_US
dc.identifier.citationKothari, Rahul. “A Comprehensive Study of Modulation Effects on CMB Polarization.” General relativity and gravitation 54.4 (2022): n. pag. Web.en_US
dc.identifier.issn0001-7701
dc.identifier.uri10.1007/s10714-022-02921-8
dc.identifier.urihttp://hdl.handle.net/10566/7679
dc.language.isoenen_US
dc.publisherSpringeren_US
dc.subjectCosmic microwave backgrounden_US
dc.subjectPolarizationen_US
dc.subjectModulationen_US
dc.titleA comprehensive study of modulation effects on CMB polarizationen_US
dc.typeArticleen_US

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Kothari2022_Article_AComprehensiveStudyOfModulatio.pdf
Size:
677.42 KB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

Research Articles (Physics)