[astroseminar at Sapienza] 01/12/2017 at 13:00: Andreas Krut

[Elia Battistelli]

Title: Novel constraints on fermionic dark matter from the Galactic 
observables
Speaker:  Andreas Krut
Institution: ICRANet
Date: FRIDAY, 1 December 2017  [TYPO CORRECTED]
Time: 1:00pm
Location: Aula 8, Fermi Building, Dept. of Physics, Sapienza University

Abstract:
It has been recently introduced a new model for the distribution of 
dark matter (DM) in galaxies, the Ruffini-Arguelles-Rueda (RAR) model, 
based on a self-gravitating system of massive fermions at finite 
temperatures. The RAR model, for fermion masses above keV, successfully 
describes the DM halos in galaxies, and predicts the existence of a 
denser quantum core towards the center of each configuration.  We 
demonstrate here that, for a fermion mass in the range 48 keV/c2≲m≲345 
keV/c2 , the DM distribution obtained from the RAR model fulfills the 
most recent data of the Milky Way rotation curves, and predicts the 
existence of a dense quantum core of 4×106M⊙within the S2-star 
pericenter. In addition, the dense quantum core represents an 
alternative to the central black hole (BH) scenario for SgrA*.

Questo seminario fa parte di una serie di incontri tipo "Brown Bag 
Lunch Meeting on Relativistic Astrophysics”. Seguono maggiori dettagli a 
tal proposito.

The "brown bag lunch" was instituted, in frugal time, at princeton in 
the Joseph Henry laboratory. They were encounters occurring in John 
Archibald Wheeler office:  lasting less than one hour and covering, 
every week, the latest results and possibly illustrated by new visitors. 
Both the theory group around Wheeler and the experimental group around 
Bob Dicke where participating. Later, as the topics became more 
favourable, they were extended to the astrophysics department (Karl 
Schwarzschild and Jerry Ostriker) and to the IAS (Freeman Dyson). The 
creation  of a sumptuous cafeteria at the IAS did create a more 
comfortable setting: these weekly meetings did not surpass the positive 
effects of the initial more frugal meetings. The transfer to Caltech of 
Princeton faculties including Kip Thorne permitted the prosecution of 
this tradition in California, equaly successfully. Since our groups have 
become larger in la Sapienza we (Paolo de Bernardis, cosmology, Fulvio 
Ricci, gravitational waves, and Remo Ruffini, gravitationally collapsed 
objects) have decided to start the "brown bag lunch" in relativistic 
astrophysics and cosmology in the physics department. The first meeting 
will be held on Friday 24 November in aula Rasetti at 1 pm and the topic 
will be the on equations of state of binary neutron-star merger.
Everyone interested is welcome to partecipate. Please bring your lunch. 
american coffee will be offered.