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View Full Version : Supernova Generates Enough Dust for 10,000 Earths



Fraser
2007-Dec-20, 07:50 PM
My kids find it fascinating that the gold in the ring on my finger was formed in an instant when a massive star detonated in a supernova explosion. But it's not just the heavier elements that get produced in a supernova, there's also dust. Lots and lots of dust that can eventually collect together into [...]

More... (http://feeds.feedburner.com/~r/universetoday/pYdq/~3/203583949/)

trinitree88
2007-Dec-21, 11:00 PM
My kids find it fascinating that the gold in the ring on my finger was formed in an instant when a massive star detonated in a supernova explosion. But it's not just the heavier elements that get produced in a supernova, there's also dust. Lots and lots of dust that can eventually collect together into [...]

More... (http://feeds.feedburner.com/~r/universetoday/pYdq/~3/203583949/)

Fraser. The isotope table of a 25 Solar Mass Supernova by Stanford Woosley indicates that ~ 2 million times the mass of the Earth in water is also generated...so when it rains supernovae ejecta, as it sometimes has on Earth in the past,...it pours. Pete

see:http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?bibcode=1995Metic..30..325M&db_key=AST

orochi
2007-Dec-23, 02:49 AM
Wait a minute....

Do we know that Cassiopeia (sp) had a mass of 25 solar masses? How big would that star have to have been to be able to eject 10,000 earth masses of dust? I'm curious about this. Anyone know???

trinitree88
2007-Dec-26, 08:06 PM
Wait a minute....

Do we know that Cassiopeia (sp) had a mass of 25 solar masses? How big would that star have to have been to be able to eject 10,000 earth masses of dust? I'm curious about this. Anyone know???



Orochi. Cas A's progenitor is unknown, but surmised as it is considered a type 2 remnant. Type 2's (core collapse) require minimally 8 solar masses (depending upon whose model you use)...while ~ 15 solar masses is more typical. 20-25 is not unrealistic, and it happens to be a model size used in the table. A solar mass is ~ a million Earth masses, so ~25 million times ~ 3 % dust (article quote),yields ~25,000,000 * .03 =~750,000 Earth masses...(check their math). There's more than that in water. With H number one, He number two, and O number three in isotopic abundances in the universe....water is ubiquitous. If you use 8 solar masses, there's about 400,000 Earth masses of dust.Ohh! Free real estate. Nice. :shifty: pete