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Supermassive black hole binary flares as predicted

The distant binary of two super massive black holes, dubbed QJ287, flared within four hours of its predicted time in July 2019, proving the existence of this system.

The central black hole has a mass 18 billion times that of the Sun. The smaller black hole has a mass of 150 million Suns. Its orbit is twelve years long, and when it makes its close approach the interaction between these two monsters causes high energy flares.

We know all this because astronomers have been watching OJ 287 since the 1890s, before they knew what it was. In the intervening century, the system has shot off two outbursts roughly every 12 years, almost like clockwork.

Yet this pattern took time to decipher, as the bigger black hole in OJ 287 is also a blazar. Its black hole, or the disk that feeds it, powers twin plasma jets shooting out along opposite directions, and one of these jets is pointed almost right at Earth. The volatility of this plasma-and-photon stream makes OJ 287 a highly variable visible-light source. It wasn’t until a century after its discovery that astronomers realized that there was a periodic signal hidden within the noise — and that dual dancing black holes could cause it.

Observations in 2005 confirmed those ideas, and astronomers made increasingly precise predictions for subsequent flares in 2007 and 2015. Now, Seppo Laine (Spitzer Science Center, Caltech), Lankeswar Dey (Tata Institute of Fundamental Research, India), and colleagues are publishing observations of the latest flare in the Astrophysical Journal. The authors predicted, and then watched for, a flare expected to arrive in the early hours of July 31, 2019.

QJ287 is 3.5 billion light years away, which makes this prediction and the observations even more remarkable.

Conscious Choice cover

Now available in hardback and paperback as well as ebook!

 

From the press release: In this ground-breaking new history of early America, historian Robert Zimmerman not only exposes the lie behind The New York Times 1619 Project that falsely claims slavery is central to the history of the United States, he also provides profound lessons about the nature of human societies, lessons important for Americans today as well as for all future settlers on Mars and elsewhere in space.

 
Conscious Choice: The origins of slavery in America and why it matters today and for our future in outer space, is a riveting page-turning story that documents how slavery slowly became pervasive in the southern British colonies of North America, colonies founded by a people and culture that not only did not allow slavery but in every way were hostile to the practice.  
Conscious Choice does more however. In telling the tragic history of the Virginia colony and the rise of slavery there, Zimmerman lays out the proper path for creating healthy societies in places like the Moon and Mars.

 

“Zimmerman’s ground-breaking history provides every future generation the basic framework for establishing new societies on other worlds. We would be wise to heed what he says.” —Robert Zubrin, founder of founder of the Mars Society.

 

All editions available at Amazon, Barnes & Noble, and all book vendors. The ebook can be purchased direct from my ebook publisher, ebookit, in which case you don't support the big tech companies and I get a bigger cut much sooner. Note that the price for the ebook, $3.99, goes up to $5.99 on September 1, 2022.

 

Autographed printed copies are also available at discount directly from me (hardback $24.95; paperback $14.95). Just email me at zimmerman @ nasw dot org.

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