Hubble Sees Two Quasars Side by Side in the Early Universe - by ScottyJ_PhD
. “This is the uniqueness of this study. It is actually telling us that this population exists, and now we have a method to identify double quasars that are separated by less than the size of a single galaxy.”
As bright as quasars are, detecting – and interpreting – the signals received from distant quasars is not easy. This pair of quasars existed just three billion years after the Big Bang, during a time period known as cosmic noon: the era between 10 and 11 billion years ago when star formation in the Universe was at its peak. They are very, very distant objects.
Like putting together a puzzle, each wavelength offered different information about the quasars, and helped researchers understand what was going on in this distant binary galaxy system. The double quasars J0749 + 2255 are so close together that they are separated by less than the space of a single galaxy, so resolving them at a distance of 10-11 billion light years away is an incredible feat.
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