Fingerprints of Galactic Loop I on the Cosmic Microwave Background
Research output: Contribution to journal › Journal article › Research › peer-review
Documents
- ApJL789(2014)L29
Submitted manuscript, 1.11 MB, PDF document
We investigate possible imprints of galactic foreground structures such as the "radio loops" in the derived maps of the cosmic microwave background. Surprisingly, there is evidence for these not only at radio frequencies through their synchrotron radiation, but also at microwave frequencies where emission by dust dominates. This suggests the mechanism is magnetic dipole radiation from dust grains enriched by metallic iron or ferrimagnetic molecules. This new foreground we have identified is present at high galactic latitudes, and potentially dominates over the expected B-mode polarization signal due to primordial gravitational waves from inflation.
Original language | English |
---|---|
Journal | The Astrophysical Journal Letters |
Volume | 789 |
Issue number | 2 |
Pages (from-to) | L29 |
Number of pages | 5 |
ISSN | 0004-637X |
DOIs | |
Publication status | Published - 10 Jul 2014 |
- Faculty of Science - cosmic background radiation – cosmology: observations – polarization
Research areas
Number of downloads are based on statistics from Google Scholar and www.ku.dk
No data available
ID: 129924563