hypernova


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hypernova

(hÿ-per-noh -vă) A new type of supernova, possibly related to cosmological gamma-ray bursts. The prototype supernova, SN 1998bw, was an unusually energetic event, some 30 times more luminous than a normal core-collapse supernova. It was also detected as a gamma-ray burst, albeit a weak one. In the best model to date, the progenitor was a rapidly rotating, massive helium star that collapsed into a black hole forming a massive disk around it. Matter ejected along the spin axis in the form of a relativistic jet is believed to be responsible for the gamma-ray burst. Several more hypernovae have been identified since 1998.
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Hypernovas are essentially giant supernovas, or exploding stars.
In the Czech Republic, as part of the re-branding of Royal Ahold's Hypernova hypermarkets to the Albert banner completed in 2009, changes in the product assortment gave a greater emphasis on private-label and a closer alignment with the ranges available at Dutch stores, including Albert Excellent and Albert Bio.
The Sisters of Mercy performs with Hypernova at 8 p.m.
The evidence they gather could help scientists understand more about hypernova explosions, which are caused by the collapse of stars over 30 times the size of the sun and can take up to 10,000 years to happen - making them difficult for scientists to track.
Both shopping centres opened in December and are anchored by Hypernova supermarkets, operated by Ahold.
Ahold, owner of the Hypernova chain, finalized sale of all its large-scale outlets at the beginning of this year and is focusing on the compact format.
The company is an exclusive supplier to Ahold (Albert and Hypernova), and also delivers Case-Ready meat to Real, the largest food retailer in Poland.
According to a leading theory, a hypernova jet generates gamma-ray bursts when particles within it collide (SN: 7/10/99, p.
A supernova discovered by a Japanese astronomer last month is highly likely to be a hypernova, which has an explosive energy of up to 100 times greater than a supernova, according to an astronomical study Thursday.
It is the most extreme object ever found in the Universe and they have christened it a 'Hypernova'.
It was shown that SN 1998bw had a very large kinetic energy (see Section 4 and Table 3) of -2-5 x [10.sup.52] erg, which led it to being referred to as a hypernova [3].