Speaker
Mr
Thilo Siewert
(Bielefeld University)
Description
Continuum surveys of the radio sky provide a rich resource of
information. Besides the analysis of individual galaxies and other
astrophysical sources, they also allow us to probe cosmological
models. We analyse the data provided by several surveys across radio
frequencies to estimate the Cosmic Radio Dipole in the radio source
counts. This dipole is a deviation from the statistically isotropic
Universe caused by the proper motion of the Solar system and the large
scale structure. The kinetic effect is also hold responsible for the
temperature dipole of the Cosmic Microwave Background.
In this talk I will describe the quality cuts required to make radio continuum catalogues suitable for cosmological analysis. In particular I will show results from the analysis of NVSS, SUMSS, WENSS, TGSS ADR1 and GLEAM, which together cover a decade in frequency and the full sky.
Primary author
Mr
Thilo Siewert
(Bielefeld University)
