Superluminous Supernovae: Extreme Explosions in Dwarf Galaxies
Ζωντανή ροή πριν από 8 ώρες
The
new generation of wide-field optical time-domain surveys has revealed
an unexpected diversity in supernovae. Most surprising of all is the
discovery of hydrogen-poor superluminous supernovae, which are brighter
than the explosions of other massive stars by a factor of ~100, but less
common by a factor ~10^4 and seemingly confined to faint,
low-metallicity galaxies. I will review the unique properties of these
events and the suggested explosion mechanisms, and show how recent
observations are converging towards a consistent explanation of the
power source. I will briefly motivate further the study of these objects
through their suitability for high-redshift studies with upcoming space
missions, and whether this could open a new window in supernova
cosmology. Finally, I will demonstrate how the distinctive dwarf
galaxies that host superluminous supernovae connect these events with
long-gamma ray bursts and perhaps even fast radio bursts, suggesting
that FRBs may track the birth rate of millisecond magnetars in
low-metallicity environments.
Host: Dan Milisavljevic
Speaker: Matthew Nicholl
new generation of wide-field optical time-domain surveys has revealed
an unexpected diversity in supernovae. Most surprising of all is the
discovery of hydrogen-poor superluminous supernovae, which are brighter
than the explosions of other massive stars by a factor of ~100, but less
common by a factor ~10^4 and seemingly confined to faint,
low-metallicity galaxies. I will review the unique properties of these
events and the suggested explosion mechanisms, and show how recent
observations are converging towards a consistent explanation of the
power source. I will briefly motivate further the study of these objects
through their suitability for high-redshift studies with upcoming space
missions, and whether this could open a new window in supernova
cosmology. Finally, I will demonstrate how the distinctive dwarf
galaxies that host superluminous supernovae connect these events with
long-gamma ray bursts and perhaps even fast radio bursts, suggesting
that FRBs may track the birth rate of millisecond magnetars in
low-metallicity environments.
Host: Dan Milisavljevic
Speaker: Matthew Nicholl
Κατηγορία
Άδεια
- Τυπική άδεια Yo
- ΑΝΑΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 21/4/2017
Δεν υπάρχουν σχόλια:
Δημοσίευση σχολίου