hypernovae

The long bursts seem associated with hypernovae in verdistant galaxies.

A Ticking Time Bomb? Zoe Brain 2008

Deuterium would be annihilated requiring the present abundance to have been produced at some later stage, such as spallation in shocks around the hypernovae of PopIII stars.

Dark Matter: Still Existing Sean 2007

Deuterium would be annihilated requiring the present abundance to have been produced at some later stage, such as spallation in shocks around the hypernovae of PopIII stars.

Dark Matter: Still Existing Sean 2007

Since, in general, GRBs are colossal explosions of energy triggered by the collision of very massive and compact objects such as neutron stars or black holes, or by the explosion of incredibly powerful supernovae, or hypernovae, one may think that these bursts are perceived as faint just because they take place very far away from us, in the remote corners of the Universe.

Space News From SpaceDaily.Com 2008

Most GRBs are thought to be triggered by the collision of very massive and compact objects such as neutron stars or black holes, or by the explosion of incredible powerful supernovae - or hypernovae.

Space News From SpaceDaily.Com 2008

So you have perhaps a chicken and the egg problem: is it that you have more massive stars when you have lower metals, or do you need lower metals to get hypernovae?

Astronomy Cast 2008

Probability that feature will fall in the required range for physical life local abundance and distribution of dark matter relative abundances of different exotic mass particles decay rates of different exotic mass particles variability of local dwarf galaxy absorption rate giant star density in galaxy frequency of gamma ray bursts in galaxy star location relative to galactic center star distance from corotation circle of galaxy ratio of inner dark halo mass to stellar mass for galaxy star distance from closest spiral arm z-axis extremes of star's orbit proximity of solar nebula to a normal type I supernova eruption timing of solar nebula formation relative to a normal type I supernova eruption proximity of solar nebula to a type II supernova eruption timing of solar nebula formation relative to type II supernova eruption timing of hypernovae eruptions number of hypernovae eruptions masses of stars that become hypernovae flux of cosmic ray protons variability of cosmic ray proton flux gas dispersal rate by companion stars, shock waves, and molecular cloud expansion in the Sun's birthing star cluster number of stars in birthing cluster star formation rate in parent star vicinity during history of that star variation in star formation rate in parent star vicinity during history of that star birth date of the star-planetary system number of stars in system number and timing of close encounters by nearby stars proximity of close stellar encounters masses of close stellar encounters distance from nearest black hole absorption rate of planets and planetismals by parent star

Reasons To Believe - dcarree 2010