Star Births &
the Skeleton of the Universe
Abel 2744 has been nicknamed Pandora’s Cluster because of the many different and strange phenomena that were unleashed by a huge collision that occurred over a period of 350 million years. A simultaneous pile-up between at least four separate clusters has produced strange effects that have never been seen together before.
“Careful imaging of the night sky reveals that most matter, under the action of gravity, is being concentrated into long strands: filamentary structures, forming a gigantic network throughout the universe. Composed of a skeleton of dark matter – which attracts much of the universe’s ordinary matter towards it – this “cosmic web” was first imaged in 2014.”
The ESA is now developing a new space telescope to further pursue this line of research, in which Switzerland and the researchers from UNIGE are especially involved. The telescope, named Athena, is expected to be operational in the mid-2020s.”
This observation result was published as Umehata et al. “ALMA Deep Field in SSA22: A concentration of dusty starbursts in a z=3.09 protocluster core” in the Astrophysical Journal Letters, issued on Dec. 4, 2015. iopscience.iop.org/article/10.1088/2041-8205/815/1/L8 , arxiv.org/abs/1510.08861
“Computer simulations predict that the missing baryons exist within low-density plasma filaments millions of light-years long. The filaments each weigh in at a few tens of trillions of solar masses.
“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. These findings support 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.”