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Dark matter

Dark matter represents one of the principal ingredients of the standard model, and its existence is demonstrated by a great number of astronomical observations. Amongst these we recall the rotation curves of spiral galaxies and the masses of galaxy clusters, along with the already mentioned fluctuations of the cosmic microwave background and the large scale distribution of galaxies. It appears clear from these observations that besides a small fraction of "unilluminated" conventional matter, 90% of dark matter must be in the form of massive elementary particles that interact with eachother (and ordinary matter) only via the force of gravity. What these particles might be remains one of the great mysteries of the cosmological model, strictly correlated with problems of fundamental physics and so to the research of the infinitely small. Research aimed at identifying the dark matter particles are both direct and indirect in nature, depending on whether they make use of an interaction with the atoms of a detector, or rely on the secondary particles expected as the result of particle annihilation. This research is mainly the prerogative of particle physics, with complimentary information provided by astronomical observations in the X-ray, optical and millimetric bands.

Radio evidence of a minor merger in the Shapley supercluster

Jan 17, 2022

Radio evidence of a minor merger in the Shapley supercluster A group of radio astronomers led by INAF has conducted a multi-frequency and multi-band study of the Shapley Supercluster, where the formation of large structures is ongoing at the present cosmological age. Radio astronomers have discovered a radio emission that acts as a "bridge" between a cluster of galaxies and a group of galaxies

Multiwavelength snapshot of a repeating fast radio burst

Dec 09, 2021

Multiwavelength snapshot of a repeating fast radio burst With a multiwavelength campaign, a group of astronomers led by the Italian National Institute for Astrophysics (INAF) studied a repeating fast radio burst (FRB). The object FRB20201124A, discovered in November 2020, reactivated in March 2021, emitting a series of radio bursts

Classifying Seyfert Galaxies with Deep Learning

Sep 28, 2021

Classifying Seyfert Galaxies with Deep Learning Scientist uses deep learning to identify low luminous Seyfert 1.9 galaxies that are usually missed by human inspection among ten thousands of spectra. These results are published in the Astrophysical Journal Supplement Series by Yen Chen Chen, in the department of physics at Sapienza University of Rome and ICRANet