Hypernova
En Hypernova kan udsende en gammaglimt med en ca. 100 gange så høj effekt som en supernova i forbindelse med eksplosionen. Hypernova-eksplosionen, der nåede os den 29. marts 2003, udsendte en effekt på 1 million gange, effekten fra vores galakses samlede stjerner.
Den 19. marts 2008 nåede en hypernova-gammaglimt (GRB 080319B) os fra en afstand af omkring 7,5 milliarder lysår – hvilket er mere end halvvejs gennem universet. Det blev observeret via Swift-teleskopet. [1]
Referencer
[redigér | rediger kildetekst]- ^ NASA/Goddard Space Flight Center (2008, March 21). Stunning Gamma Ray Burst Explosion Detected Halfway Across Universe. ScienceDaily. Retrieved March 22, 2008 Citat: "...A powerful stellar explosion detected March 19 by NASA's Swift satellite has shattered the record for the most distant object that could be seen with the naked eye...Several ground-based telescopes saw the afterglow brighten to visual magnitudes between 5 and 6 in the logarithmic magnitude scale used by astronomers...Later that evening, the Very Large Telescope in Chile and the Hobby-Eberly Telescope in Texas measured the burst's redshift at 0.94...GRB 080319B's optical afterglow was 2.5 million times more luminous than the most luminous supernova ever recorded..."
Eksterne henvisninger
[redigér | rediger kildetekst]- Sciencedaily, 2003-04-07, It's A Nova … It's A Supernova … It's A HYPERNOVA
- 28 September 2000, Astronomy Bizarre: What the Heck is a 'Hypernova'
- NASA, 20 may 99: Brighter than an Exploding Star, It's a Hypernova!
- Space.com, 07 March 2000, Possible Hypernova Could Affect Earth Citat: "...What causes all this strange behavior in Eta Carinae is very simple: It’s enormous, more than 100 times the mass of our sun....at 7,500 light-years it’s still close enough to do some damage. However, the likely damage is not to humans directly, but to satellites and the upper atmosphere..."
- NASA, October 21, 1998: When stars go hyper Arkiveret 2. februar 2006 hos Wayback Machine Different kind of nova ends not with a whimper, but with a bang