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Space

Astronomers Spot Baby Galaxies Cradled In Dark Matter (phys.org) 73

An anonymous reader writes: Astronomers discovered a nest of monstrous baby galaxies 11.5 billion light-years away using the Atacama Large Millimeter/submillimeter Array (ALMA). The young galaxies seem to reside at the junction of gigantic filaments in a web of dark matter (abstract). These findings are important for understanding how monstrous galaxies like these are formed and how they evolve in to huge elliptical galaxies. The team found that their young monstrous galaxies seemed to be located right at the intersection of the dark matter filaments. This supports the model that monstrous galaxies form in areas where dark matter is concentrated. And since modern large elliptical galaxies are simply monstrous galaxies which have mellowed with age, they too must have originated at nexuses in the large scale structure.
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Astronomers Spot Baby Galaxies Cradled In Dark Matter

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  • when they're small.
    • by KGIII ( 973947 )

      Yeah, but like so many other babies - it's probably surrounded by gas, namely methane. (Did not RTFA.)

  • by Capt.Albatross ( 1301561 ) on Saturday December 05, 2015 @07:27PM (#51064463)

    Is it not a matter of conjecture that these galaxies are forming in regions where dark matter is concentrated? - a reasonably well-founded conjecture perhaps, but not corroborated by any evidence beyond that which is the basis of the conjecture?

    • Hence the use of the word "seem."

    • The dark matter filiments are observable by the lensing effect of the gravity they exhibit. So it's not conjecture is an observable and repeatable fact that there is something equivelant to mass there.
      • On the basis of this equation, the optical energy flow can be deflected by a magnetic field

        found here http://lpm2c.grenoble.cnrs.fr/... [grenoble.cnrs.fr]
        Funny, there seems to be something else that can bend light in our universe.

  • How are we doing on finding those dark matter filaments that supposedly lurk in our own solar system? Now that New Horizons has uploaded all its Pluto flyby JPGs and is sending the Raws, it could soon perform some experiment that would test this possibility.

  • I was of the impression we detect dark matter indirectly, by the orbital velocities of galaxies and by gravitational lensing effects.

    How did we determine that dark matter forms filaments, and how did we map the positions of these filaments?

  • They hate it when you do that!
    • They hate it when you do that!

      And don't infantalize them either, or they will throw a tantrum.

  • TFA uses an annoyingly vague term and fails to define it. How large are these galaxies?

"A complex system that works is invariably found to have evolved from a simple system that worked." -- John Gall, _Systemantics_

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