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GR: Fachverband Gravitation und Relativitätstheorie

GR 17: Kosmologie

GR 17.2: Vortrag

Freitag, 17. März 2017, 11:15–11:30, SFG 0140

New estimates of the Cosmic Radio Dipole — •Thilo Siewert — Universität Bielefeld

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 analyze 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 presentation the results of recent dipole analysis based on the TGSS ADR1 at 150 MHz is presented and compared with results at other frequencies.