Speaker
Marcin Hajduk
(University of Warmia and Mazury in Olsztyn)
Description
Planetary nebulae are gaseous shells ejected by low-mass stars at the end of their lives. The shells are ionized by hot central stars. The ionized plasma is a source of thermal radio continuum emission at GHZ frequencies with a spectral index between 0 and 2. This emission is spatially correlated with optical emission lines. LOFAR images revealed radio emission originating in many cases from regions different from optical emission. Radio spectra derived using archival data reveals the non-thermal spectral indices. This indicates presence of magnetic fields in planetary nebulae. We will discuss the possible origin of magnetic fields in these objects.
Author
Marcin Hajduk
(University of Warmia and Mazury in Olsztyn)
Co-authors
Prof.
Glenn White
(Open University)
Prof.
Jesus Toala
(UNAM)
Prof.
Marijke Haverkorn
(Radboud)
Prof.
Timothy Shimwell
(Leiden)
