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Astronomy Picture of the Day -- Spin up of a Supermassive Black Hole
NASA ^ | March 12, 2013 | (see photo credit)

Posted on 03/12/2013 7:07:02 PM PDT by SunkenCiv

Explanation: How fast can a black hole spin? If any object made of regular matter spins too fast -- it breaks apart. But a black hole might not be able to break apart -- and its maximum spin rate is really unknown. Theorists usually model rapidly rotating black holes with the Kerr solution to Einstein's General Theory of Relativity, which predicts several amazing and unusual things. Perhaps its most easily testable prediction, though, is that matter entering a maximally rotating black hole should be last seen orbiting at near the speed of light, as seen from far away. This prediction was tested recently by NASA's NuSTAR and ESA's XMM satellites by observing the supermassive black hole at the center of spiral galaxy NGC 1365. The near light-speed limit was confirmed by measuring the heating and spectral line broadening of nuclear emissions at the inner edge of the surrounding accretion disk. Pictured above is an artist's illustration depicting an accretion disk of normal matter swirling around a black hole, with a jet emanating from the top. Since matter randomly falling into the black holee should not spin up a black hole this much, the NuSTAR and XMM measurements also validate the existence of the surrounding accretion disk.

March 12, 2013

(Excerpt) Read more at 129.164.179.22 ...


TOPICS: Astronomy; Astronomy Picture of the Day; Science
KEYWORDS: apod; astronomy; blackhole; einstein; generalrelativity; kerrsolution; ngc1365; nustar; science; stringtheory; xmm
[Illustration Credit: Robert Hurt, NASA/JPL-Caltech]

1 posted on 03/12/2013 7:07:02 PM PDT by SunkenCiv
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To: 6SJ7; AdmSmith; AFPhys; Arkinsaw; allmost; aristotleman; autumnraine; Beowulf; Bones75; BroJoeK; ...


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2 posted on 03/12/2013 7:09:38 PM PDT by SunkenCiv (Romney would have been worse, if you're a dumb ass.)
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To: SunkenCiv
"How fast can a black hole spin?"

Pretty fast.

3 posted on 03/12/2013 7:09:51 PM PDT by fieldmarshaldj (Resist We Much)
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To: brytlea; cripplecreek; decimon; bigheadfred; KoRn; Grammy; married21; steelyourfaith; Mmogamer; ...
Note, this is an illustration/artist's conception, thanks for reading this note.

4 posted on 03/12/2013 7:11:21 PM PDT by SunkenCiv (Romney would have been worse, if you're a dumb ass.)
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To: fieldmarshaldj
George Takei

5 posted on 03/12/2013 7:12:28 PM PDT by SunkenCiv (Romney would have been worse, if you're a dumb ass.)
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To: SunkenCiv

noted


6 posted on 03/12/2013 7:12:40 PM PDT by bigheadfred
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To: bigheadfred

Wow, I really worded that clumsily. Clumsily? Wow, that doesn’t look right either.

Time for bed...


7 posted on 03/12/2013 7:13:55 PM PDT by SunkenCiv (Romney would have been worse, if you're a dumb ass.)
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To: fieldmarshaldj

If you want to know how fast a black a-hole can spin, you could take measurements at the next Obama press conference.


8 posted on 03/12/2013 7:15:01 PM PDT by John Valentine (Deep in the Heart of Texas)
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To: SunkenCiv; fieldmarshaldj

...where’s a photon torpedo when ya need one???...danged black holes...


9 posted on 03/12/2013 7:17:55 PM PDT by bigheadfred
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To: SunkenCiv

Oh, dear. That is shocking! As if no one would notice? Lord have mercy.


10 posted on 03/12/2013 7:19:37 PM PDT by TheOldLady
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To: SunkenCiv

clumsily

go clumb into bed silly


11 posted on 03/12/2013 7:20:56 PM PDT by bigheadfred
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To: SunkenCiv

Nice APOD Mr. Civilizations, and a beautiful artist’s rendering of what one might expect to see while too close to a black hole to escape its gravity.


12 posted on 03/12/2013 7:21:53 PM PDT by TheOldLady
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To: TheOldLady; bigheadfred

I wish the larger version at the APoD website were a bit larger than it is.


13 posted on 03/12/2013 7:31:05 PM PDT by SunkenCiv (Romney would have been worse, if you're a dumb ass.)
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To: SunkenCiv
Well THEN they would have to change the title:

Astronomy Picture of the Day -- Spin up of a Ultramassive Black Hole

14 posted on 03/12/2013 7:39:32 PM PDT by bigheadfred
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To: TheOldLady

What happens when a White Hole tries to merge with a Black Hole.

15 posted on 03/12/2013 7:40:29 PM PDT by fieldmarshaldj (Resist We Much)
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To: SunkenCiv

16 posted on 03/12/2013 7:45:10 PM PDT by Maceman
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To: SunkenCiv
Supermassive Black Hole m.u.s.e.
17 posted on 03/12/2013 8:42:19 PM PDT by Don W (There is no gun problem, there is a lack of humanity problem!)
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To: SunkenCiv

Mooshell?


18 posted on 03/12/2013 9:46:04 PM PDT by sheik yerbouty ( Make America and the world a jihad free zone!)
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To: SunkenCiv

Wow!


19 posted on 03/13/2013 2:22:08 AM PDT by hattend (Firearms and ammunition...the only growing industries under the Obama regime.)
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To: SunkenCiv

You can’t zoom in using your mouse? I have a Marathon Mouse, and Ctrl-mouse wheel forward makes everything bigger. Also, on the computer, Ctrl-+ does the same thing.

To get back to normal in either case, Ctrl-0. And I wish we could control zer0.


20 posted on 03/13/2013 3:13:09 AM PDT by TheOldLady
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To: TheOldLady
And I wish we could control zer0.

Comment of the day!

21 posted on 03/13/2013 9:22:57 AM PDT by JimRed (Excise the cancer before it kills us; feed &water the Tree of Liberty! TERM LIMITS, NOW & FOREVER!)
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To: fieldmarshaldj

Indeed. JJ looks as if he’s totally uninterested.


22 posted on 03/13/2013 1:01:50 PM PDT by TheOldLady
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To: JimRed

[smiles] Thanks!


23 posted on 03/13/2013 1:02:27 PM PDT by TheOldLady
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To: fieldmarshaldj

You may think there’s some modicum of resemblance to 7 of 9 but let me assure you that the assimilated life form pictured below. designated as 2 of 69 in no way resembles anything remotely similar to 7 of 9.


24 posted on 03/13/2013 4:33:27 PM PDT by lbryce (BHO:"Now, I am become Death, the destroyer of worlds by way Oppenheiner at Trinity NM)
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To: Maceman

LOL


25 posted on 03/13/2013 6:13:42 PM PDT by SunkenCiv (The 12th root of 2 changed everything.)
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