Tag: SN 1987A

The supernova – supernova remnant connection in SN 1987A. The study: “Hydrodynamic simulations unravel the progenitor-supernova-remnant connection in SN 1987A” of S. Orlando (INAF-OAPA) recently appeared on A&A

Ricerca

Stars more massive than 9 solar masses end their evolution in spectacular supernova explosions. These explosions are triggered by the gravitational collapse of the core of such massive stars, once the thermonuclear reactions are exhausted and the core is not supported against gravity by the pressure produced by the reactions. Supernovae are not simple spherical explosions, but rather complex phenomena

» Read more
, , , , ,

31 years of evolution of a supernova remnant. The study: “3D MHD modeling of the expanding remnant of SN 1987A. Role of magnetic field and non-thermal radio emission” of S. Orlando (INAF-OAPA) recently published by A&A

Ricerca

During the 1987 February 23rd night, astronomers observed the explosion of a supernova in the Large Magellanic Cloud, a satellite galaxy of the Milky Way. The exploded star was the blue supergiant Sanduleak (Sk) − 69o202, with a mass of 20 solar masses, and its explosion produced the supernova remnant SN 1987A. From that moment, SN 1987A was observed with

» Read more
, , , ,

Shock e riscaldamento degli ioni in ambienti astrofisici. Pubblicato su Nature Astronomy lo studio “Collisionless shock heating of heavy ions in SN 1987A” di M. Miceli (UNIPA/OAPA)

Ricerca

Gli shock sono onde d’urto che viaggiano a velocità supersonica e sono molto importanti in astrofisica perché vengono osservati su diverse scale spaziali ed in diversi contesti, dal nostro “piccolo” sistema solare, fino a scale extragalattiche e cosmologiche. Gli shock astrofisici differiscono da quelli osservabili sulla Terra perché si manifestano in condizioni estreme, non riproducibili sul nostro pianeta.  Mentre nell’atmosfera

» Read more
, , , ,