Comments on: AstroAlert: Type Ia supernova in M101!

By: Wzrd1

Wzrd1 — Sun, 02 Oct 2011 00:08:40 +0000

I remember seeing a deflagration to detonation model from LANL ages ago. The pressure wave generated by the deflagration increased, pressing inward, as the point where deflagration initiated expanded, surface boundary density differences caused the wave to reflect back “in” toward the center of the mass, until sufficient pressure was generated that the center detonated, with the detonation wave expanding outward.
While, the model was on high explosive, the overall principle is much the same, the added compression changing a simple deflagration into a detonation source.

As for those asking about the fate of the two red giants, they’ve both a black eye a piece. Some of their matter was ablated by the shock wave, but most of their mass will remain.
But, the resultant nebula will have two cone shaped holes in it, resulting from their “shadow” in the shock front.

By: Supernovas and Neutrinos « physics4me

Supernovas and Neutrinos « physics4me — Tue, 20 Sep 2011 16:07:20 +0000

[...] collapses and protons convert to neutrons as described above, with the ensuing neutrino blast. The current supernova is a Type Ia, which explodes through a different though not completely underst… Type Ia supernovas are very important in astronomy, since they show considerable regularities [...]

By: Supernovas and Neutrinos | Of Particular Significance

Supernovas and Neutrinos | Of Particular Significance — Tue, 20 Sep 2011 04:13:34 +0000

[...] star collapses and protons convert to neutrons as described above, with the ensuing neutrino blast. The current supernova is a Type Ia, which explodes through a different though not completely underst… Type Ia supernovas are very important in astronomy, since they show considerable regularities [...]

By: Tangleoak

Tangleoak — Tue, 06 Sep 2011 07:27:56 +0000

The locals that may have once inhabited the worlds that orbited these two Red Giants may have been very old civilizations of up to twice the age of our intelligence. If this was the case they definitely did see it coming and started to migrate to their respective outer planets millions of years before they were in any real danger of cataclysmic extinction. After we learn to colonize and teraform the outer planets and moons then it becomes much more feasible to begin the process of transporting our knowledge base and peoples to other suitable star systems. It’s this basic survival instinct that will ultimately take us to the stars and transform us into what Carl Sagan referred to as class IV or V civilizations that have learned to harness all of the available energy from their galaxies. This is why we should all call about our star systems, how they work as younger healthy systems and how they die as older systems to make way for new star nurseries.

By: Comienza el IFA 2011. Algunos lo empezaron hace días. | El mundo de las zapateces

Fri, 02 Sep 2011 10:40:33 +0000

[...] “el LHC está cerca de atrapar el bosón de Higgs“. No, tema muy sobado. “Supernova estalla ‘al lado’ de la tierra“. Tampoco; es probable que hasta fuera ella la que la descubrió. ¿Por qué demonios no [...]

By: [BLOG] Some Thursday links « A Bit More Detail

[BLOG] Some Thursday links « A Bit More Detail — Fri, 02 Sep 2011 04:01:38 +0000

[...] Astronomy alerted its readers to the very bright supernova in galaxy Messier 101, just 25 million light years [...]

By: Supernova PTF 11kly « Alexander Safir

Supernova PTF 11kly « Alexander Safir — Thu, 01 Sep 2011 07:13:12 +0000

[...] Plait of Bad Astronomy did a write up of the various observations which have been made to date. I would recommend checking that out for some great comparison of Type [...]

By: Our Place in the Universe – Supernova Examined « Dead Wild Roses

Our Place in the Universe – Supernova Examined « Dead Wild Roses — Wed, 31 Aug 2011 13:04:42 +0000

[...] From Bad Astronomy: [...]

By: chill sends this quote from a news release by the Lawrence Berkeley National Laboratory: « Bitter Harvest

Wed, 31 Aug 2011 11:23:08 +0000

[...] 21 million light-years away—than any other of its kind in a generation. Astronomers believe they caught the supernova within hours of its explosion, a rare feat made possible with a specialized survey telescope and state-of-the-art computational [...]

By: New supernova getting bigger « The HabitableZone

New supernova getting bigger « The HabitableZone — Mon, 29 Aug 2011 20:20:30 +0000

[...] New supernova getting bigger August 29, 2011 1:20 pm by podrock Boulder’s own Bad Astronomer has the details and the links. Control PanelLog [...]

By: Colin

Colin — Mon, 29 Aug 2011 20:16:55 +0000

What are the chances I’ll ever be able to see this with my Celestron IYA2009 First Scope telescope?

By: Brand-New Supernova Spotted Within Hours, Will Be the Most-Studied Star Explosion Ever « Science Technology Informer

Sun, 28 Aug 2011 21:07:11 +0000

[...] at Bad Astronomy, Phil Plait describes that Type Ia supernovae occur when a super-dense white dwarf siphons material [...]

By: Rick

Rick — Sun, 28 Aug 2011 18:25:19 +0000

This is really cool… If we can pin-down the growth part of the luminosity curve it’ll go a long way to improving/validating the models of these events!

By: Bonnes vacances ! | La création

Bonnes vacances ! | La création — Sun, 28 Aug 2011 11:01:31 +0000

[...] devrait cependant fournir des informations inédites. Si les premières estimations se confirment, PTF 11kly devrait atteindre la magnitude apparente de 10 dans les semaines à venir, ce qui la rendra visible [...]

By: GRBjunky

GRBjunky — Sun, 28 Aug 2011 01:01:03 +0000

If the red giants are not red herrings, the double degenerate model will face serious challenge.

By: anna

anna — Sat, 27 Aug 2011 13:07:16 +0000

whats the neerest star in ursa major, is it alkaid???

By: articles

articles — Sat, 27 Aug 2011 02:12:06 +0000

First time I seen a star being eat by a black hole

By: Brand-New Supernova Spotted Within Hours, Will Be the Most-Studied Star Explosion Ever By Rebecca Boyle « New Age

Fri, 26 Aug 2011 23:10:47 +0000

[...] at Bad Astronomy, Phil Plait describes that Type Ia supernovae occur when a super-dense white dwarf siphons material [...]

By: Brand-New Supernova Spotted Within Hours, Will Be the Most-Studied Star Explosion Ever

Fri, 26 Aug 2011 20:01:57 +0000

[...] at Bad Astronomy, Phil Plait describes that Type Ia supernovae occur when a super-dense white dwarf siphons material [...]

By: KC

KC — Fri, 26 Aug 2011 19:09:40 +0000

@Relativity: The processes are different…in a regular star all the hydrogen & helium has been present for billions of years – in this case hydrogen is being dumped relatively quickly on to the white dwarf (not a neutron star, which is a whole different animal).

May be this is a poor analogy: the gasoline in your car doesn’t explode when you start it – but if you toss a bucket full of gasoline onto a fire – FOOOM!

By: Robert Berta

Robert Berta — Fri, 26 Aug 2011 18:35:48 +0000

Aliandre_D …your post #22….hmmm.
If you have the Lovecraft “Cthulhu Live” check out the cover of the book and the photo credit inside the book
Robert Berta

By: Kafernusse

Kafernusse — Fri, 26 Aug 2011 18:09:38 +0000

Buy stock in Celestron, Orion, and Meade…

By: Brand-New Supernova Spotted Within Hours, Will Be the Most-Studied Star Explosion Ever | clockhard.com

Fri, 26 Aug 2011 18:04:17 +0000

[...] to NASA to use the Hubble Space Telescope, which will observe the supernova this weekend.Over at Bad Astronomy, Phil Plait describes that Type Ia supernovae occur when a super-dense white dwarf siphons material [...]

By: Doug Little

Doug Little — Fri, 26 Aug 2011 17:46:56 +0000

loud @38,

Doh, Yes that’s what I meant. I wonder what the nebula looks like right now? How long do nebula’s last before they either re-collapse or dissipate? Can they Re-collapse?

By: Brand-New Supernova Spotted Within Hours, Will Be the Most-Studied Star Explosion Ever | Science & Technology

Fri, 26 Aug 2011 17:25:40 +0000

[...] at Bad Astronomy, Phil Plait describes that Type Ia supernovae occur when a super-dense white dwarf siphons material [...]