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Thread: Astronomers Think They’ve Found the Neutron Star Remnant From Supernova 1987a

  1. #1
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    Astronomers Think They’ve Found the Neutron Star Remnant From Supernova 1987a

    Recent observations and theortetical work have brought us one step closer to resolving the mystery of what lies at the center of the supernova SN 1987A
    The post Astronomers Think They’ve Found the Neutron Star Remnant From Supernova 1987a appeared first on Universe Today.


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  2. #2
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    Quote Originally Posted by Fraser View Post
    Recent observations and theortetical work have brought us one step closer to resolving the mystery of what lies at the center of the supernova SN 1987A
    The post Astronomers Think They’ve Found the Neutron Star Remnant From Supernova 1987a appeared first on Universe Today.


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    This has required 33 years of patience. Nascent neutron stars are typically born in asymmetric explosions which deliver a "kick"( SCHLOVSKII, Russia, circa 1974). Stats from pulsar surveys indicate a mean velocity of about 400 km/ sec. However, some are born going much faster than that, ...more like 1800 km/ sec. To simplify the calculation, let's pretend that pulsar/ neutron star SN1987A is going 3000 km/sec, which is 1% of the speed of light. Since the Large Magellanic Cloud, home to the object, is about 165,000 lightyears away, it takes 100 years of travel time for each lightyear of distance. That means it could escape the LMC, and come crashing through the roof of your building reading this, in about 16.5 million years.
    That would make an awful mess of your then historic building. With a million times the mass of the Earth, going through the last thirty miles of air, in about 1/100 th of a second, you wouldn't have time for a good selfie!
    Of course, having the same mass as the sun, it would begin to distort optical images in astrophotography as it approached the solar system.....might take your mind off other things for a bit.
    Most strangely, many moons ago, Sterling Colgate, a very sharp guy, wrote a paper in the Spring issue of The Los Alamos Journal of Physics about such a scenario, with the neutron star traveling through the entire Earth, and emerging out the back side.....along with bits and pieces, of people taking selfies....and delivering sufficient kinetic energy in the collision to annihilate all life forms in about 30 seconds, melting the crust and creating a ring around Earth, like Saturn. But most remarkably, the Earth would survive eventually, recoalesce, and get back perhaps to chimpanzees coming down out of trees, learning hand signals and grunts to hunt in packs, avoid cheetahs, and lions, control fires, discover copper in wood ashes, make tools, farm implements, aquaducts, hot baths, radio, TV, telescopes, and music videos. Patience is a virtue.

    pete

    P.S. Sterling did say the Earth would survive...I kind of embellished a bit to make the story sing and dance a bit....add yer own Tik Toc...lol

    the Sterling Colgate paper was circa 1988, give or take a few
    Last edited by trinitree88; 2020-Aug-15 at 02:17 AM. Reason: clarify time period,typos

  3. #3
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    So that the anxious amongst us can sleep at night, if you notice the rings of gas in SN187a's remnant, are both visible. That suggests the radial axis of symmetry is NOT pointed at us, which is where the neutron star is ejected, "Parity, Pulsars, and Supernova Remnants, Vassar College,AAPT, 1992. ( pete).
    However you can't sleep perfectly comfortable, because theorists estimate 100,000 to a million neutron stars per galaxy, and escape velocity is more typically 250 km/ sec, so there can be a lot of surprises in the night.

    See:https://www.google.com/search?q=supe...1xAAmx7Qe9GziM
    Last edited by trinitree88; 2020-Aug-14 at 04:48 PM. Reason: link image

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