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jamessavik

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jamessavik last won the day on May 19 2015

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About jamessavik

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    Geezer Cat

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    Male
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    50
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    Darkest Ignoramia
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    astronomy, physics, math, programming, E-bay, red heads, my truck

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  1. Make us laugh!

    I predict a winner in a landslide. Head is wildly popular.
  2. Physics

    A Kilonova Detected --"A Cosmic Phenomenon Long Theorized But Never Conclusively Observed — Until Now" Daily Galaxy October 16, 2017 In the world of astrophysics, Aug. 17, 2017, was a red-letter day. “This is a game-changer for astrophysics,” said UC Santa Barbara faculty member Andy Howell, who leads the supernova group at the Las Cumbres Observatory (LCO). “A hundred years after Einstein theorized gravitational waves, we’ve seen them and traced them back to their source to find an explosion with new physics of the kind we’ve only dreamed about.” First, NASA’s orbiting Fermi satellite identified a burst of high-energy gamma rays. Then, in the minute leading up to the Fermi burst, scientists noticed microscopic distortions in space caused by gravitational waves passing through the Earth. When they combined the data from the two Laser Interferometer Gravitational-Wave Observatory (LIGO) facilities in Hanford, Washington, and Livingston, Louisiana, with the data from the Virgo detector in Italy, they realized they could localize the disturbance to a relatively small region of the sky — only about 150 times the size of the full moon — near the constellation Hydra. Astronomers at Las Cumbres Observatory (LCO) in Santa Barbara activated their robotic network of 20 telescopes around the world and were one of six teams to co-discover a new source of light in that region and localize it to the galaxy NGC 4993, only about 130 million light years away. “Such a gravitational wave signal had never been seen before but was unmistakably generated by two neutron stars spiraling together,” explained Iair Arcavi, a NASA Einstein postdoctoral fellow in UC Santa Barbara’s Department of Physics and leader of the LCO follow-up effort. The resultant study appears in the journal Nature. The outburst that occurs right after two neutron stars merge is called a kilonova, a phenomenon that had long been theorized though never conclusively observed — until now. Unlike traditional ground-based facilities with single telescopes, the LCO network could observe the phenomenon every few hours for five consecutive days. During that time, the light from the explosion dimmed by a factor of 20, fading at an unprecedented rate for something so luminous. “This marks the first time in history that an astronomical phenomenon has been first sensed through gravitational waves and then seen with telescopes,” Arcavi said. “For years, we’ve heard theorists predict how a kilonova should look. I couldn’t believe we were finally seeing one for the first time.” Kilonovae are thought to be the primary source of all the elements heavier than iron in the universe. For example, most of the gold on Earth may have been created in a kilonova. The name originates from the prediction that a kilonova would be a thousand times brighter than a nova, though dimmer than a supernova. “We know now that one reason they had been so elusive is that they fade too quickly for conventional astronomical facilities to detect,” Arcavi said. “Thanks to knowing where to look and then having telescopes networked together all around the world, we were able to watch this new type of cosmic explosion rise and fade in real time,” said co-author Curtis McCully, a postdoctoral researcher at LCO and in the UCSB Department of Physics. “This is a remarkable story of the advent of gravitational wave astronomy combined with robotic internet-based optical astronomy.” LCO astronomers also used their and other facilities around the world, including the 8-meter Gemini telescope in Chile, to split the light of the kilonova into its chromatic components: a rainbow. McCully led this study, which appears in The Astrophysical Journal Letters. “We found that only a tiny amount of material was ejected in the explosion —only about 1 percent of the total matter in the system,” he noted. “The material was also flung out at an extraordinary speed, as much as 30 percent of the speed of light.” The LCO group also contributed to a third study measuring the Hubble constant, which characterizes the expansion rate of the universe. That research used the inspiraling neutron stars as “standard sirens” to determine their distance from Earth and compared that distance to the redshift, or how much light has been stretched by the expansion of the universe. That study appears in the journal Nature. The Daily Galaxy via UC Santa Barbara
  3. Inspirational Quotes

  4. Physics

    "Everybody Knew It Had To Be There" --Missing Half of Normal Matter in the Universe Has Been Detected October 09, 2017 Daily Galaxy “Everybody sort of knows that it has to be there, but this is the first time that somebody – two different groups, no less – has come up with a definitive detection,” says Ralph Kraft at the Harvard-Smithsonian Center for Astrophysics in Massachusetts. Observations of galaxies and galaxy clusters in the local universe can account for only 10% of the baryon content -made of particles called baryons rather than dark matter- inferred from measurements of the cosmic microwave background and from nuclear reactions in the early Universe. Locating the remaining 90% of baryons has been one of the major challenges in modern cosmology. The missing links between galaxies have finally been found. This is the first detection of the roughly half of the normal matter in our universe – protons, neutrons and electrons – unaccounted for by previous observations of stars, galaxies and other bright objects in space. Models of the universe say there should be about twice as much ordinary matter out there, compared with what we have observed so far. Now, two separate teams found the missing matter – made of particles called baryons rather than dark matter – linking galaxies together through filaments of hot, diffuse gas. “The missing baryon problem is solved,” says Hideki Tanimura at the Institute of Space Astrophysics in Orsay, France, leader of one of the groups. The other team was led by Anna de Graaff at the University of Edinburgh, UK. “There’s no sweet spot – no sweet instrument that we’ve invented yet that can directly observe this gas,” says Richard Ellis at University College London. “It’s been purely speculation until now.” Because it's not quite hot enough for X-ray telescopes to observe. Both teams took advantage of a phenomenon called the Sunyaev-Zel’dovich effect that occurs when light left over from the big bang passes through hot gas to find another way to definitively show that these threads of gas are really there. As photons of light travel, some of them scatters off the electrons in the gas, leaving a dim patch in the cosmic microwave background from the birth of the cosmos that were to faint to be mapped by the Planck satellite in 2015. Both teams selected pairs of galaxies from the Sloan Digital Sky Survey that were expected to be connected by a strand of baryons. They stacked the Planck signals for the areas between the galaxies, making the individually faint strands detectable en masse. Tanimura’s team stacked data on 260,000 pairs of galaxies, and de Graaff’s group used over a million pairs revealing firm evidence of gas filaments between the galaxies. Tanimura’s group found they were almost three times denser than the mean for normal matter in the universe, and de Graaf’s group found they were six times denser confirming that the gas in these areas is dense enough to form filaments. “We expect some differences because we are looking at filaments at different distances,” says Tanimura. “If this factor is included, our findings are very consistent with the other group.” “This goes a long way toward showing that many of our ideas of how galaxies form and how structures form over the history of the universe are pretty much correct,” says Ralph Kraft. Journal references: arXiv, 1709.05024 and 1709.10378v1 The Daily Galaxy via New Scientist and NextBig Future and ARXIV.org
  5. Memeing in the 1st Republic

    Thank you for setting this up! History Channel: did marie antoinette really say let them eat cake
  6. Inspirational Quotes

  7. Memeing in the 1st Republic

    Some people might think that the 1st memes invented were Keyboard cat, Philosoraptor and the numa-numa guy. That would be very, very wrong. Imagine you lived in a Kingdom that was one of the most powerful and influential in the world but, it had fallen on hard times. The king was, by all accounts, a corrupt incompetent dolt. The people were hungry and the spoiled, foolish Queen, when told there was no bread for the peasants said let them eat cake. While this might sound uncomfortably familiar to modern Americans, this was the climate that gave rise to the French Revolution. It was also the fertile ground for the French satirists who I submit were early generation memers. What people fail to understand about memes is they are much more about ideas than humor but the combination of the two makes them that much more powerful. What we call memes is an evolution of a very old idea called satire more succinctly defined as the illustration of the absurd with absurdity. Every middle schooler naturally knows about satire because that is when they inevitable meet an incompetent and bungling bureaucracy. One must take care with satire as to be a proper smart ass, you must first be smart. Otherwise you are just an ass. There were many French satirists. I would like to focus on a gentleman named Voltaire. Voltaire and the French satirists used their wit to point out the myriad hypocrisies and inequities of their political and social situations. Like Charlie Hebdo, many of the French Revolutionary era satirists faced rather deadly blow-back from those that failed to see the humor in their work. This was an amazing era and one that the modern democracies owe much to because many of the things we see as foundations of democracy were first discussed by the thinkers during this era. They were seeing the end of the monarchy as a practical form of government and looked forward to imagine what the next step would look like. See if you recognize any of Voltaire's ideas: I disapprove of what you say, but I will defend to the death your right to say it. Judge a person by their questions, rather than their answers. To learn who rules over you, simply find out who you are not allowed to criticize. It is dangerous to be right when the government is wrong. Common sense is not so common. It is hard to free fools from the chains they revere. Prejudices are what fools use for reason. As long as people believe in absurdities they will continue to commit atrocities. When it is a question of money, everybody is of the same religion. Superstition sets the whole world in flames; reason quenches them. Voltaire would have been hell on wheels if he had internet access. Be suspicious when you hear people in power discount the ideas of others. Those silly memers that poke them right in the hypocrisies have quite the history. So when you see memers banned from facebook or twitter, what you are really seeing is da man swatting the Socratic gad-fly that stung him in a sore spot. Only a fearful tyrant censors speech. He is afraid that you will tell the people just what a putz he really is.
  8. 14 years & stuff

    Friday night I picked up my 14 year clean & sober medallion. The official date is Oct. 1 but that was the first Friday after. Shit happens. I feel like disappearing with a bottle sometimes but once you get in the habit of choosing something different, it gets a little easier with time. That doesn't make it easy. Just easier. Like that shit in Las Vegas this week. That seriously pissed me off. OK- I'm angry but, fuck it. Getting hammered won't help. So I focus my white hot anger elsewhere. What I would do to anyone I caught shooting at kids (at my age that's anybody under 30) doesn't bear close consideration but it would hurt real bad, last a long time and a chainsaw would figure prominently in it. In other matters there is something I've been asked- why didn't you join the new Pit club? No mas. Talking politics is just too toxic.
  9. Compared to Katrina, Nate was a wuss. It didn't even disturb the cats.

    1. drpaladin

      drpaladin

      You sound disappointed.  :P

    2. wenmale64

      wenmale64

      Careful what you wish for, even by implication.

    3. drpaladin

      drpaladin

      I'm sure not looking forward to the part of Nate I'll get here.

  10. Here we go again. Hurricane Nate is in my face. See you when the power comes back. 

    1. sandrewn

      sandrewn

      Good luck, stay safe.

       

      sandrewn

    2. Reader1810

      Reader1810

      Stay safe, James

    3. wenmale64

      wenmale64

      Same as above. Stay safe and keep your fur buddys safe also.

  11. Proclamation of Extreme Wretchedness

    Proclamation of Extreme Wretchedness When in the course of human events, you come across a day like Monday Oct. 2nd, 2017, drinking heavily is authorized and encouraged by this office. Las Vegas Violence Death of Tom Petty Plumbing problems The only thing that could make it better would be a root canal. All that adds up to holy shit, nuke me now! Shutup Little Kim. Quit playing with your tiny missile or you'll go blind.
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