Monday, September 14, 2009

WR104 - Our Very Own Personal Death Star?

This afternoon, I watched an amazing show (DVR'd from History Channel)
titled "The Universe: Death Stars". (1)

Sure... we, as a civilization could go out at any moment by way of the dinosaurs..
(Think: movie Armageddon with Bruce Willis [2])
Then again, there's always GRB (Gamma Ray Burst) pulsar radiation that could,
at minimum, zap our ozone and wipe us out the slow way through the food
chain, or obliterate our planet if close enough, just like Star Wars's Death Star. (3)

I learned that the GRB is only released if there is a rotational
influence on the Pulsar.. So if its not spinning fast, when it implodes,
GRB is very unlikely.. (1)
So slower is better - safety-wise.

Enter "MSPs" (Millisecond Pulsars - pulsars that rotate once every 10
milliseconds or faster): They, then, are a real threat out there.
IE, One pulsar, JI903+0327, rotates once every 2.15 milliseconds,
and is one of the faster-spinning among the known MSPs. (4)

The fastest? One of them is PSR J1748-2446ad, in star cluster called Terzan 5,
(28,000 light-years from us) in the constellation Sagittarius.
This "...pulsar is spinning 716 times per second, or at 716 Hertz (Hz), readily
beating the previous record of 642 Hz from a pulsar discovered in 1982.
For reference, the fastest speeds of common kitchen blenders are 250-500 Hz."
(5)

"...One death star, named WR104 [Wolf-Rayet], lurks 8,000 light-years from Earth and
some believe its GRB arrow is aimed directly at us.." (6,7)
Check out that animated spinning spiral at discovermagazine.com; that is nearly straight
on to our view (per article, with a possible canting factor of 0-16 degrees), which signifies
that it is pointed nearly straight at us.

But not to panic (for now).. According to the show, we still have about 100,000 years
to worry about this Pulsar. But, granted, that is only one of the many that we know about.
What about the ones we haven't detected yet? Kind of a scary thought. As mentioned in
the show, they are literally "Ticking Time Bombs."

We're all going to die eventually, but man.. what a way to go.. :|

Reference Links:
(1) http://www.history.com/shows.do?action=detail&episodeId=472758
(2) http://www.imdb.com/title/tt0120591/
(3) http://en.wikipedia.org/wiki/Death_Star
(4) http://www.physorg.com/news130085807.html
(5) http://www.nrao.edu/pr/2006/mspulsar/
(6) http://blogs.discovermagazine.com/badastronomy/2008/03/03/wr-104-a-nearby-gamma-ray-burst/
(7) http://en.wikipedia.org/wiki/WR_104

More Reading:
http://physicsworld.com/cws/article/news/25913

Interactive Support:
http://einstein.phys.uwm.edu/
http://www.december212012.com/
http://grb.sonoma.edu/