Monster Black Hole Busts Theory 248
Genocaust writes "A stellar black hole much more massive than theory predicts is possible has astronomers puzzled. Stellar black holes form when stars with masses around 20 times that of the sun collapse under the weight of their own gravity at the ends of their lives. Most stellar black holes weigh in at around 10 solar masses when the smoke blows away, and computer models of star evolution have difficulty producing black holes more massive than this. The newly weighed black hole is 16 solar masses. It orbits a companion star in the spiral galaxy Messier 33, located 2.7 million light-years from Earth. Together they make up the system known as M33 X-7."
Supermassive black holes (Score:3, Insightful)
Re:Supermassive black holes (Score:5, Informative)
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Re:Supermassive black holes (Score:5, Funny)
Re:Supermassive black holes (Score:5, Insightful)
Re:Supermassive black holes (Score:5, Insightful)
I'm sure that there are ways to fudge things so that the desired mass can be reached. Or, there again, the simulations could be wrong. That happens, for all that Michael Fish wishes otherwise. Well, maybe not. He stands to make a lot of money from his new book because of that fiasco.
Re:Supermassive black holes (Score:4, Interesting)
And, yes, it seems the simulations are wrong. That's why it's hard for the current nova theories (read models) to create a black hole this big.
Supermassive gaseous layers exploding softly (Score:4, Funny)
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Re:Supermassive black holes (Score:5, Funny)
Wouldn't it be : In Soviet Russia, you eat black holes ?
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Well, seeing how both people and goods had a habit of disappearing and never being seen again in Soviet Russia, I'd say that both forms are correct. I wonder if that reflects some deep, underlaying symmetry in the Laws of Politics ?
As an interesting aside, the light emitted near the event horizon of a black hole experiences red shift as it climbs up the gravitational field, and the Soviet Russia's flag is... red. Does that mean that Soviet Russia
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Re:Supermassive black holes (Score:4, Funny)
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If I am not mistaken, the largest stars tend not to be binary/trinary. Once the mass gets past a certain point, it upsets the harmonics needed to make doubles and triples. However, I can't find any verification of this mentally rusty snippet of info.
Pairs don't merge very often (Score:5, Informative)
Further, large stars have short lives, meaning that the time for friction to rub them closer to each other is shorter.
However, it is true that a collision of two big mid-life stars may itself trigger a supernova because the total mass exceeds a stable size, and thus a very large black hole is formed. This may result in a black hole that *looks* like it came from a star larger than the max stable size of a star because its exceeding the stable limit itself is what triggered the formation of the hole. In short, there may be a limit to stable star size, but not to unstable star size.
Re:Supermassive black holes (Score:5, Informative)
Re:Supermassive black holes (Score:4, Funny)
Regarding base-3, I've seen posts that don't talk about it, and posts that use the term "trinary", and posts that use the term "ternary".
Seems about right...
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Re:Supermassive black holes (Score:4, Funny)
you misspelled 'arse'.
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As a kid studying cosmology I was once told that you only needed 3 solar masses of imploding stellar material to make a black hole.
Are there any theories to cover black holes made up of say, more than one galaxy? Is there any upper limit?
(Clears throat)"Beyond the blue Event Horizon, Heechee waiting for meeeee..."
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I LOL'D ... hard =D.
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Re:Supermassive black holes (Score:5, Interesting)
Like This [universetoday.com].
Or, more pedantically, black holes may never form at all [newscientist.com] from the point of view of an observer outside the event horizon.
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There could be a way to test the new theory. The Large Hadron Collider being constructed at CERN in Geneva might just be capable of making microscopic black holes - or, if Vachaspati is right, black stars.
Goody. This should end well.
Unlike the large, long-lived black holes in space, these microscopic objects would evaporate fast. The spread of energies in their radiation might reveal whether or not an event horizon forms.
What exactly does "evaporate" mean when referring to black holes (stars)?
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Say it ain't so, Joe! (Score:2)
Can you confirm that the math is correct on this (with respect to the constraints on upper and lower limits) and that 1 second is a viable time frame for a black holes existence at this size and
Re:Supermassive black holes (Score:4, Insightful)
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There are different categories of Black Holes. The very wikipedia article you linked to mentioned this in the 'Formation' Section:
- Black holes of this size can form in several ways. The most obvious is by slow accretion of matter (starting from a black hole of stellar size).
TFA refers to an unexpected size for a Stellar-class Black Hole.
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It seems patentently obvious that this particular BH ( and another one I read about that was ~40sols ) somehow gained mass after forming. But scientists being the skeptical critters they are prefer evidence over supposition since that is how theories are strengthened or discarded. Astro
Re:Supermassive black holes (Score:5, Informative)
Super-massive black holes like what exist at the center of a galaxy don't have a well understood origin, but it is supposed that if a black hole is created in a region of space with a great deal of matter in the vicinity, it may gobble up a lot of it, adding to its mass until it becomes super-massive.
A stellar black hole that's so big it shouldn't be possible for it to have been created by the usual supernova, and in a region of space sufficiently vacant to rule out the gobbling theory, is what is being puzzled over.
Re:Supermassive black holes (Score:5, Interesting)
The region of space is vacant now - it doesn't mean that it was when the black hole was feeling peckish.
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Isn't it funny how we don't even capitalize "black hole?" I'll bet anybody that in 500 years people are going to read our words and tell each other, "...they believed in these things called 'Black Holes!'" It'll be like the flat earth days.
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They don't form. (Score:2)
The existing theories only limit how black holes can be formed from less dense materials.
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A wizard did it. [tvtropes.org]
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In the Dark (Score:3, Interesting)
It amazes me at how much we DON'T know.
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Well, I wasn't talking about black holes being made from dark matter, but like you said, matter we were "in the dark" about or matter than we are unable to detect. Well, evidently, we were in the dark of about 75% of the matter than can exist in black holes. It wasn't
Re:In the Dark (Score:5, Funny)
The following may help to explain things (taken from an Slashdot post):
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I suppose I could hold a hand close to a lightbulb, and since I feel the heat on the light side, not along the sides where "friction" should be the greatest...
I don't think that would work. The heat output from a lightbulb is likely dominated by the heat generated by the current that is powering its dark-sucking device and so the dark friction heat involved is unlikely to be noticed in comparison. You would probably need considerably more sensitive equipment than a human hand to measure it. The sun only gets as hot as it does because of its /mindboggling/ dark-sucking capabilities. Lightbulbs aren't even wimps in comparison :-)
What you might do, however, is put
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I wonder if this is where all that "dark matter" is. Scientist keep talking about how there is so much more matter than what we can detect. Well, we haven't been able to detect this until now. How much more is missing, I wonder.
It amazes me at how much we DON'T know.
Maybe these dark holes are proof of string theory, because they formed from strings that resonate at the same frequency and so they all join together and resonate at a larger amplitude, and this is what makes them seem so massive.
Or maybe you and I aren't astrophysicists and we shouldn't talk about how much "we" don't know, and let the people who know what they're talking about do the theorizing.
I for one... (Score:2)
A giant black hole? (Score:4, Funny)
The internet has ruined my mind. (Score:5, Funny)
Never mind things like Goatse. Thanks to the internet, the only word in the title that doesn't yet have dirty connotations to me is "theory".
Heck, some are working to change that too [wikipedia.org].
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That's because where sex is concerned practice is better than theory. Now if you'll excuse me, I'm going off to surf for some ther0y.
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That's more of a giant reddish-pink hole. I don't think there's a theory on that.
sturgeon's law redux (Score:5, Funny)
Sturgeon's Law (paraphrased): 90% of everything sucks.
Just goes to show, that when you think it can't suck any worse, you find it can suck a LOT worse.
It must be said (Score:2)
- Shamefully ripped off from 'Contact' by Carl Sagan
Did we link a start gate to it or is linked to a.. (Score:2)
Residents of companion star get bad rap.... (Score:5, Funny)
It's not messy, it's got a lived-in, homey feel to it you insensitive clod!!!
Did we link a stargate to it or is linked to a ori (Score:2)
Simple solution! (Score:3)
After all, that's how we deal with all cosmological phenomena we don't understand - prefix it with "Dark" and you're all set!
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Computer models of Supernovae (Score:5, Interesting)
Re:Computer models of Supernovae (Score:4, Interesting)
Not true. As a numerical relativitist, I can tell you that no decent 3D simulations of supernovae currently exist.
Half the problem is that the physics is simply unknown - is it sufficient for your model to contain rotation, magnetic fields, and what about the equation of state of the plasma? Neutrinos are also thought to play an incredibly important role in the supernova explosion mechanism, and subsequent nucleosynthesis (and other processes) that go on during the supernova event itself. The other half is the sheer computing power to evolve your equations over decent time scales with enough resolution, not to mention making sure the numerical methods you employ work.
There are plenty of groups who are currently working towards 3D evolutions without any neutrino transport, and I think some people have done neutrinos in 1D. Try checking out some of the work by Leibendorfer [arxiv.org], for example.
A quick run down of the supernova event though, since the article skims over it very lightly: heavy elements gradually build up at the core (nickel and iron especially), and nuclear fusion shuts down due to their high binding energies [wikipedia.org]. As a result, outwards pressure ("thermal support") is lost, and at some critical moment the core will rapidly collapse onto itself (on a timescale of less than a second) as gravity becomes the dominant force. The outer layers will also in-fall onto this collapsing core.
Depending on the mass of the star, we'd expect the core to collapse into some kind of 'proto' neutron star, or straight into a black hole, if it's massive enough. In the case of the former, neutrinos escaping from the cooling central proto neutron star deposit energy into the outer layers, and drive the actual supernova explosion-event. In the case of the latter, I'm not sure that you'd actually see much of a supernova since neutrinos wouldn't be able to escape from a black hole - or at least the explosion mechanism would be different. There is an 'intermediate' option though: a proto neutron star that later on collapses into a black hole, from the still in-falling outer layers. If this happens you'd expect both a black hole, and pretty violent supernova to boot.
I'm not sure about the numbers presented in the article either. Typically, stars above 8 solar masses will collapse and create a supernova and neutron star remnant. Stars over 20 solar masses should form a neutron star which later collapses into a black hole (as is the case here). Stars over 50 solar masses or so will probably just collapse straight into a black hole, with unknown supernova mechanisms.
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Full disclosure: John was my PhD thesis advisor, and I did my research on the evolution of supernova remnants well after the initial explosion. I graduated in the 90s, back when such high-res 3D simulations were merely dreams.
A steller collision? (Score:2)
Trinary System? (Score:2)
quick fix (Score:2)
computer models of star evolution have difficulty producing black holes more massive than this
Maybe they need to buy more PS3's [slashdot.org]
So much for science! (Score:3, Funny)
But...
ONCE AND FOR ALL!
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hmm (Score:5, Insightful)
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Re:hmm (Score:5, Funny)
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x-rays aren't light? Or... wait a sec! (Score:2)
OK, I have a basic understanding of the x-rays produced, but seriously, shouldn't the above confuse most lay-people who might read t
Re:x-rays aren't light? Or... wait a sec! (Score:4, Informative)
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Or are you just being unnecessarily pedantic?
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Beautiful Katamari (Score:2, Funny)
I blame the King of All Cosmos and his damned tennis racquet. Time to start rolling up all your junk.
Upgrade computer used for models... (Score:3, Funny)
Perhaps they need to upgrade to another OS [slashdot.org] better optimized for modeling black holes... Unless they're saving this for modeling those super-massive ones.
Cue the goatse puns (Score:2)
Summary... (Score:2)
News at 11? We have a long way to go with cosmology, I just don't get how surprised people seem when we get a surprise.
Hawking's interlude (Score:2)
like a fucking black hole even light can't escape.
Got the mind to bust a rhyme to make your brain bleed,
other rappers talk shit, but they gotta concede
that I'm a three sandwich eatin', super-model meetin';
step to me punk and you're gonna get a beatin'.
16 Solar Masses? (Score:2)
That'e because... (Score:2)
As long as you can cram your square peg theory into the round hole we see through our telescopes, it becomes acc
I noticed the oldnews tag attached... (Score:3, Funny)
After all, with it being 2.7 million light years away, we certainly know that this story couldn't have been breaking news any later than the end of the last great ice age.
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Did you forget to listen to Hemispheres ?