Abstract

Contributed Talk - Splinter Magnetic

Thursday, 24 September 2020, 09:49   (virtual room H)

Compact Starburst Dwarf Galaxies at 150 MHz: Strong Magnetic fields in Proxies for Proto-Galaxies

D.J. Bomans, F. Soto Bravo, and the LoTSS team
Ruhr University Bochum, University of Vienna

In order to perform a detailed analysis of first galaxies and thus understand the formation and evolutionary process of galaxies in the very early universe, we need the sensitivity and resolution of the next generation telescopes like JWST, E-ELT, and SKA. To overcome this technical barrier now, one can use proxies of these galaxies in the local universe, like compact, strongly starforming dwarf galaxies. Using data from the LOFAR 150MHz LoTSS Survey we probed the radio continuum emission in compact, low mass starburst galaxies and derived their magnetic fields (using three different approaches). The analysis of our sample suggests that that magnetic fields may play a mayor role for the evolution of the low mass galaxies at high redshift (e.g. for the structure and evolution of their galactic outflows/winds). It also implies that these galaxies main contributors for the magnetization of the intergalactic medium.