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    Daniel R. Bisque
    Keymaster

    The Dragonfly Project is at it again, only in reverse this time.

    When we last wrote about the Dragonfly team, they had just announced discovery of Dragonfly 44, a galaxy composed of 99.9 per cent dark matter.  (The Dragonfly telescope array is mounted atop a Paramount Taurus 600 and remotely controlled through scripted operation of TheSkyX Professional Edition.)

    This time, the dynamic duo of Dr. Roberto Abraham of the University of Toronto and Dr. Peter van Dokkum of Yale University used their multi-array Dragonfly system to determine that the previously-cataloged galaxy named NGC1052-DF2, (DF2 for short) actually has low-surface brightness, and structure (as opposed to being only a collection of point sources).
    Based on this new information, follow up measurements were made by the 10 m W. M. Keck telescope and determined that DF2 is composed of…almost no dark matter.  As dark matter is supposed to be the DNA of galaxy formation, this discovery is posing fundamental new questions about galaxy formation.  Wow!  What will they uncover next?
    Related reading:

    • This topic was modified 1 year, 2 months ago by  Daniel R. Bisque.
    #258941

    peter27284
    Participant

    Since galaxy evolution is not completely understood, one could speculate that this is the end stage of some very ancient galaxy.  Perhaps its the end of the line for this type of galaxy?  

    This isn't the first celestial object to be missing matter dark or otherwise, take a look at M1 where did it all go?

    Coooool stuff this is

    Peter

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