Conveners
Kilonovae, Supernovae and SNRs
- Gasper Kukec Mezek (Linnaeus University)
We investigate the thermal emission and extinction from dust associated with a nearby superluminous supernova (SLSN) at $z=0.0267$, SN~2018bsz, in order to determine its nature. We use the 7-channel imager GROND to extensively monitor the photometric evolution of SN~2018bsz. This is the first dataset with daily cadence and simultaneous optical and near-infrared (NIR) coverage for a SLSN. At...
The detection of an electromagnetic counterpart to the gravitational-wave source GW170817 marked year zero of the multi-messenger gravitational-wave era. This event was generated by the merger of two neutron stars and gave rise to an electromagnetic transient, dubbed a “kilonova”, which was intensively monitored with all the main ground-based and space-borne facilities. In this talk, I will...
The thermal transient following a binary neutron star merger, known as a kilonova (KNa), is expected to enter the steady state nebular phase several days to weeks after merge. In this state, the ejecta is optically thin and bolometric luminosity tracks instantaneous radioactive energy deposition. The steady-state phase is expected to last until reprocessing timescales become long, at which...
SNR 0540-69.3 is a ~1000 year-old-supernova remnant (SNR) located in the Large Magellanic Cloud. This remnant is associated with an active pulsar and a pulsar-wind nebula (PWN) and also possesses an oxygen-rich ejecta. Oftentimes, SNR 0540 is referred to as the Crab’s twin due to their similar properties, including the millisecond pulsar and PWN.
We study the continuum emission of the...
Core collapse supernovae (CC-SNe) are the violent and bright explosions that end the lives of massive stars (M>8M$_\odot$), leaving behind exotic remnants such as black holes and neutron stars. A currently unsolved question in supernova research is the origin of Type Ib and Ic SNe, which lack hydrogen, or hydrogen and helium, spectral signatures respectively, indicating that the outer stellar...
Supernovae are the end stages of stellar evolution, resulting in enormous energy release. They have a great impact on their environment, help us understand stellar and galactic evolution, shock physics and radiative processes, and are linked to life on earth. In the radio, synchrotron radiation from the interaction of the supernova ejecta with the dense circumstellar material is visible....
Despite the importance of massive stars and star clusters for the energy content, stellar population and evolution of galaxies, the mechanism that ignites their formation in molecular clouds is still poorly addressed. Infrared Dark Clouds (IRDCs) are a class of very massive and dense objects, likely to be the precursors of massive stars. Recent simulations have shown that interstellar shocks...
Core-Collapse Supernovae (CCSNe) are important objects in the scope of global nucleosynthesis, neutrino and gravitational waves emissions, and even cosmology. However, the early stages of these processes are not observable through the classical electromagnetic radiations observations. This is why we rely on simulations to explore the possible mechanisms leading to the final explosion. One of...
