Question about the Black Hole B-Flat

The reports say that the black hole discovered by CHANDRA is emitting
a frequency "57 octaves below middle C". Middle C is usually accepted
to be 256 Hz; 57 octaves below that is around 3.5E-15 Hz - a period of
almost 9 million years (all BOE calculations.)

I'm fascinated to know: how'd they detect and measure this?

Thanks,

- L
--
Larry Huntley Beaverton, Oregon
Skep-Ti-Cult® Member #130-978649-969 http://www.skepticult.org/
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Dear Larry Huntley:

"Larry Huntley" wrote in message
04.17...
The reports say that the black hole discovered by CHANDRA is emitting
a frequency "57 octaves below middle C". Middle C is usually accepted
to be 256 Hz; 57 octaves below that is around 3.5E-15 Hz - a period of
almost 9 million years (all BOE calculations.)

I'm fascinated to know: how'd they detect and measure this?

Got a link to the "reports"?

David A. Smith

On 12 Sep 2003, (formerly) wrote in sci.astro:

Dear Larry Huntley:

"Larry Huntley" wrote in message
04.17...
The reports say that the black hole discovered by CHANDRA is emitting
a frequency "57 octaves below middle C". Middle C is usually accepted
to be 256 Hz; 57 octaves below that is around 3.5E-15 Hz - a period of
almost 9 million years (all BOE calculations.)

I'm fascinated to know: how'd they detect and measure this?

Got a link to the "reports"?

First saw it he

http://www.cnn.com/2003/TECH/space/0...eut/index.html

but figured that might be "popular science", so checked he

http://chandra.harvard.edu/photo/2003/perseus/

Same statement at both sites.

Thanks,

- L
--
Larry Huntley Beaverton, Oregon
Skep-Ti-Cult® Member #130-978649-969 http://www.skepticult.org/
"Skepticult subculture -- the dark underbelly of Usenet" (Jade_Dragon)
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"Thomas Edison inventor of direct currant"

- Flagship1 of the Paranormal, 9 Sep 2003

Dear Larry Huntley:

"Larry Huntley" wrote in message
4.17...
On 12 Sep 2003, (formerly) wrote in sci.astro:
....
Got a link to the "reports"?

First saw it he


http://www.cnn.com/2003/TECH/space/0...eut/index.html

"To scientists, he said, pressure ripples equate to sound waves. By
calculating how far apart the ripples were, and how fast sound might travel
there, the team of researchers determined the musical note of the sound."

I suspect they are not detecting the sound, but attempting to recreate it
from geometries...

Let's see if someone who knows more responds.

David A. Smith

(formerly)" wrote:

Dear Larry Huntley:

"Larry Huntley" wrote in message
4.17...
On 12 Sep 2003, (formerly) wrote in sci.astro:
...
Got a link to the "reports"?

First saw it he


http://www.cnn.com/2003/TECH/space/0...eut/index.html

"To scientists, he said, pressure ripples equate to sound waves. By
calculating how far apart the ripples were, and how fast sound might travel
there, the team of researchers determined the musical note of the sound."

I suspect they are not detecting the sound, but attempting to recreate it
from geometries...

Let's see if someone who knows more responds.

David A. Smith

I think you have figured out their method. They certainly have not
been watching long enough to measure the period, directly. Think of
the radiating sound waves as the layers of an onion, with alternating
layers rarefied and compressed. They observed the onion.

--
John Popelish

Dear John Popelish:

"John Popelish" wrote in message
...
(formerly)" wrote:
....
Let's see if someone who knows more responds.

I think you have figured out their method. They certainly have not
been watching long enough to measure the period, directly. Think of
the radiating sound waves as the layers of an onion, with alternating
layers rarefied and compressed. They observed the onion.

This brings tears to my eyes... ;}

David A. Smith

On Sat, 13 Sep 2003 08:20:03 -0700, (formerly) wrote:

"To scientists, he said, pressure ripples equate to sound waves. By
calculating how far apart the ripples were, and how fast sound might
travel there, the team of researchers determined the musical note of the
sound."

Of course, this assumes that they have calculated the speed of sound
correctly for the region around the black hole.

--
Lucius Chiaraviglio
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