The relaxation techniques of galaxy clusters
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Created: Monday, 06 February 2023 00:06
How do you relax? With a quick ski descent on a black slope or with a good book in front of the fireplace? Each has its own techniques and even galaxy clusters have more than one.
The study of the dynamic structure of galaxy clusters provides information on their formation and evolution mechanisms. A useful indicator of this structure is the phase space mass density (hereinafter PSD) profile, i.e. the amount of mass per unit of spatial volume and velocity as a function of distance from the center of the cluster.
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The unexplored world of MINCE: Abundances of neutron capture elements where no one is looking
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Created: Friday, 27 January 2023 00:06
Only chemical elements up to iron can be formed inside stars by nuclear fusion. Heavier elements such as lead, gold, or uranium are produced thanks to neutron capture; for this reason, these elements are known as neutron-capture elements.
We can distinguish at least two production channels of heavy elements: the one called "slow process" (s-process), linked to captures that are slow compared to the beta decay time of the unstable isotopes that are formed; and "rapid process" (r-process) in which several captures occur before beta decay has time to act.
For the s-process we have in-depth knowledge of who the main actor is, i.e. stars of small masses during the last stages of their life.
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