Gamma-ray burst could kill off ocean life
in [Physics]
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From: Sam Wormley on 25 Jul 2010 09:05 On 7/24/10 11:04 PM, Brad Guth wrote: > How much gamma did we get from Sirius(B)? You do know that Sirius B is a white dwarf and not a black hole, Right?
From: palsing on 25 Jul 2010 14:58 On Jul 25, 6:05 am, Sam Wormley <sworml...(a)gmail.com> wrote: > On 7/24/10 11:04 PM, Brad Guth wrote: > > > How much gamma did we get from Sirius(B)? > > You do know that Sirius B is a white dwarf and not a black > hole, Right? And, just to be clear, this means that Sirius B was never a supernova... \Paul A
From: Brad Guth on 25 Jul 2010 16:54 On Jul 24, 11:13 pm, "Chris.B" <chri...(a)nypost.dk> wrote: > On Jul 25, 6:04 am, Brad Guth <bradg...(a)gmail.com> wrote: > > > > > How much gamma did we get from Sirius(B)? > > It's a bit late to be contacting the ambulance chasers now. In other words, you still don't have a clue. ~ BG
From: Brad Guth on 25 Jul 2010 16:56 On Jul 25, 6:05 am, Sam Wormley <sworml...(a)gmail.com> wrote: > On 7/24/10 11:04 PM, Brad Guth wrote: > > > How much gamma did we get from Sirius(B)? > > You do know that Sirius B is a white dwarf and not a black > hole, Right? It was nearby when its helium flashover took place. Are you suggesting that a powerful nova is not gamma worthy? ~ BG
From: Brad Guth on 25 Jul 2010 16:59
On Jul 25, 11:58 am, palsing <pnals...(a)gmail.com> wrote: > On Jul 25, 6:05 am, Sam Wormley <sworml...(a)gmail.com> wrote: > > > On 7/24/10 11:04 PM, Brad Guth wrote: > > > > How much gamma did we get from Sirius(B)? > > > You do know that Sirius B is a white dwarf and not a black > > hole, Right? > > And, just to be clear, this means that Sirius B was never a > supernova... > > \Paul A The original mass of Sirius(B) was likely less than 10 Ms, and as a result it didn't live very long before going postal. ~ BG |