Saturday, April 04, 2009

Galaxies Not Half-Baked

Infrared image of cluster XMMU J2235.3-2257 taken by Subaru telescope, seen at a distance 65% of the way back to the Big Bang. Green contours represent X-ray intensity measured by the XMM-Newton spacecraft, targeting the brightest galaxy in the cluster.

Just as scientists can't explain "acceleration" of the Universe, the very existence of large galaxies can not be explained. Until recently it was thought that large galaxies started small and got bigger by swallowing smaller ones. Researchers at Liverpool John Moores University cast doubt on the half-baked galaxy idea. Using our Subaru telescope atop Mauna Kea, they have peered back 2/3 of the way to the Big Bang. They found that even at this early time the heaviest galaxies weighed almost as much as today. Their results appear in this week's issue of NATURE. LJMU Press Release.

Each galaxy contains at its centre a massive Black Hole. The Black Holes appear to have formed in the first billion years of the Universe. Evidence may indicate that they are primordial, formed from quantum fluctuations shortly after the Big Bang. Size of a primordial Black Hole is limited by a "horizon distance" within light's reach. Primordial Black Holes were thought to be tiny because of the fixed speed of light. Discovery of massive galaxies containing giant Black Holes is more evidence that c was once much higher.

This weekend see dark skepticism in the Carnival of Space!



Blogger nige said...

This comment has been removed by the author.

3:42 AM  
Blogger nige said...

"Just as scientists can't explain "acceleration" of the Universe, the very existence of large galaxies can not be explained."

Well, I predicted the acceleration in 1996 and published it, despite censorship. That was years before Perlmutter confirmed it.

Because we're looking back in time with increasing distance, Hubble's law implies acceleration.

Suppose we look to distance R. The age of the universe t at distance R plus the time light takes to travel from distance R to us T is equal to 1/H in flat spacetime:

t + T = 1/H (see fig 2 here)


v = HR = H(cT) = Hc[(1/H) - t] = c - (Hct)

so acceleration of universe:

a = dv/dt = d[c - (Hct)]/dt = -Hc = 6×10^{-10} ms^{-2}

I can't understand why people can't understand this. It's simple.

Suppose a supernova is a billion light years away. In that case

t = 13.7 - 1 = 12.7 billion years

T = 1 billion years

T + t = 13.7 billion years = 1/H in flat spacetime

Put "T + t = 1/H" into Hubble's law, v = HR = HcT = Hc[(1/H) - t] = c - (Hct), then differentiate to find acceleration of universe:

a = dv/dt = d[c - (Hct)]/dt = -Hc = 6×10^{-10} ms^{-2}

What is wrong? It preceded the discovery, it is the right number. Where is it wrong? Yes, it's unfashionable and and was censored out by Nature in 1996 for being an untested prediction and then by them after it was confirmed (with no explanation then!), but scientifically fashion is not important for actual knowledge.

I just can't understand why people don't grasp this!

But I'm glad you are continuing to blog and the description of primordial black holes is very interesting. Thanks!

3:50 AM  
Blogger David M. Merchant said...

Just a bit of trivia: In Japanese, Subaru is their word for the Pleiades. A poetic name for a telescope.

10:28 AM  
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10:59 PM  

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