Federico Urban
(KBFI, Tallin, Estonia)
11/01/2017, 15:00
The ghost-free massive spin-2 fields of multimetric extensions of General Relativity turn out to be very perfect
candidates for the observed Dark Matter. I will review the theoretical foundations of bigravity, and outline the qualities
of spin-2 gravitational dark matter.
Reverberi Lorenzo
(Cosmology and Gravity Group, University of Cape Town (South Africa).)
18/01/2017, 14:30
In this review talk, I will present the current status of LCDM, the cosmological concordance model, discuss observational challenges and possible theoretical extensions to the standard paradigm.
Gabriele Greco
(Universita' di Trento)
30/01/2017, 14:30
In 300 million of years spiders have developed well specialized structures in order to survive to different habitats. For this reason, Evolution has made spiders one of the biggest presence on Earth (overcome only by insects). Apart from the natural history interest, the physics of these structures inspires a lot of smart technologies. In this seminary, an overview of these structures will...
Prof.
Lev Titarchuk
(Ferrara University)
02/03/2017, 12:00
I will present details of observations of Galactic and extragalactic Black Hole (BH) sources, interpreting the results in the light of first principles theory of X-ray spectral formation. I will also show that, in the BH case, this theory predicts the spectral index vs. mass accretion rate correlation, with the spectral index which increases and then saturates with the mass accretion...
Luciano Rezzolla
(Institute of Theoretical Physics, Frankfurt, Germany)
23/03/2017, 14:30
I will argue that if black holes represent one the most fascinating implications of Einstein's theory of gravity, neutron stars in binary system are arguably its richest laboratory, where gravity blends with astrophysics and particle physics. I will discuss the rapid recent progress made in modelling these systems and show how the in spiral and merger of a binary system of neutron stars is...
V.V. Tikhomirov
(Institute for Nuclear Problems, Belarus State University, Minsk)
06/04/2017, 10:00
Since 50-th high-energy (GeV-TeV and above) particle interaction with crystals serves a source of the long list on new physical phenomena which can be readily continued in the nearest future. In 80-th the synchrotron-like e± pair production process, close to that in a uniform magnetic field of neutron stars, was predicted and observed at CERN. Pair production in crystals, enhanced by both the...
Juan Luis Aguado Casas
(Departamento de Ciencias Integradas, Universidad de Huelva, Spain)
03/05/2017, 11:00
Phosphoric acid production is an example of the so-called NORM activities. NORM industries imply the presence of significant radioactivity levels before/during/after the production process. This lecture will be focused on an interesting case located at SW of Spain (Huelva city). Radioactive and radiological results will be shown.
Juan Luis Aguado Casas
(Departamento de Ciencias Integradas, Universidad de Huelva, Spain)
04/05/2017, 14:30
Electrical power produced by NPP (nuclear power plants) is closely related to two topics of social concern: nuclear wastes and nuclear accidents consequences. This lecture will show briefly: (a) basic concepts about nuclear wastes management challenges; and, (b) radioactive impact and lessons learned after the Fukushima accident (2011).
Juan Luis Aguado Casas
(Departamento de Ciencias Integradas, Universidad de Huelva, Spain)
05/05/2017, 09:30
Teaching Physics is not easy, mainly when first-year college students have not enough Maths/Phys level. Even more, some of them tend to think this subject is “boring” or “useless”. Several methodologies could be applied in order to solve this “teaching problem”. For instance, the University of Huelva "Physnema Project" uses movie clips to show interesting Physics topics (similar procedures are...
Antonio Parretta
(Universita' di Ferrara)
15/05/2017, 14:30
Il flusso, indotto per gravità, di una serie di sferette omogenee di varia natura e di diametro d=4-6mm attraverso tronchi di cono a parete soffice, è stato studiato in funzione delle dimensioni del foro di uscita, per diversi valori dell’angolo di apertura del cono. Sono state individuate differenti regioni di cinetica del flusso, delimitate da multipli interi dispari del diametro delle...
Jon Gudmundsson
(Oskar Klein Centre for Cosmoparticle Physics, Stockholm, Sweden)
17/05/2017, 11:30
SPIDER is a balloon-borne experiment designed to image the polarization of the cosmic microwave background with the aim of constraining models of the early universe. SPIDER was launched on January 1, 2015 and successfully completed a 17-day flight across Antarctica. A subsequent flight is scheduled for December 2018. I will briefly review the experiment, present early results from from...
Fan Xing
(Department of Physics, University of Tokyo)
21/06/2017, 11:00
Vacuum magnetic birefringence (VMB) is a sensitive probe for beyond the Standard Model physics as well as a new verification of QED at low energies. The OVAL experiment (Observing VAcuum with Laser) aims to observe VMB with high repetition pulsed magnets. Our dedicated made pulsed magnet system applies a magnetic field of 9.0 T over a length of 0.17 m with a repetition rate of 0.1 Hz. We...
Moslem Zarei
((Department of Physics, Isfahan University of Technology, Iran))
04/07/2017, 14:30
In this seminar I will talk about the interaction of cosmic microwave background photons with the magnetic moment of nucleons and electrons at the last scattering surface.
I will show that this secondary effect generates the B-mode polarization by rotating of the direction of the linear E-mode polarization.
Marco Selvi
(INFN - Bologna)
12/07/2017, 11:00
We report the first dark matter search results from XENON1T, a~2000 kg dual-phase xenon time projection chamber in operation at the Laboratori Nazionali del Gran Sasso in Italy, the first ton-scale detector of this kind. The blinded search used 34.2 live days of data acquired between November 2016 and January 2017. Inside the (1042±12) kg fiducial mass and in the [5, 40] keVnr energy range of...
Corrado Gatto
(INFN - Napoli)
13/07/2017, 14:30
The $\eta$ meson is almost unique in the particle universe since it is
a Goldstone boson and the dynamics of its decay are strongly constrained.
Because the eta has no charge, decays that violate conservation laws can occur
without interfering with a corresponding current. The integrated eta meson
samples collected in earlier experiments have been less than ~$10^8$ events,
limiting...
Antonio Parretta
(Dipartimento di Fisica - UniFe)
17/10/2017, 15:00
Gli esperimenti di dispersione della luce bianca eseguiti da Newton con i prismi rimangono tra i più belli della fisica e vengono replicati costantemente nelle scuole e nelle università. Ma c’è un aspetto che non sempre viene considerato, e cioè che la luce rifratta la prima volta all’interno del prisma equilatero, oltre che essere ulteriormente rifratta e dar luogo, in uscita, al ben noto...
Mattia Negrello
(Cardiff University)
18/10/2017, 11:00
The Herschel Astrophysical Terahertz Large Area Survey (H-ATLAS) is the widest-area extragalactic survey undertaken with the Herschel space observatory, covering around 600 square degrees of the sky from far-infrared to sub-millimetre wavelengths. One of its scientific goals is the systematic search of gravitationally lensed dust-obscured galaxies using a simple and efficient method that was...
Dolgov Alexander
(Dip. Fisica e Sicenze della Terra, Universita di Ferrara)
18/10/2017, 12:00
A review is presented on astronomical observations of the last several years, which have discovered that the universe at the red-shfts, z=5 -10, is unexpectedly densely populated by bright galaxies, supermassive black holes (quasars), gamma-bursters, supernovae and is very dusty. It is argued that the origin of these early formed objects do not agree with the conventional theory of their...
Niels Lund
(DTU Space (Denmark))
24/10/2017, 15:00
Both Silver and Gold are primarily produced via the rapid neutron capture process. For many years this process has been associated with supernova explosions, because only there the necessary conditions in terms of temperature, matter density and neutron fluences could be realized, it was felt. In more recent times also the partial disruption of close, binary neutron stars during their...
Eloisa Menengoni
(Universita' la Sapienza di Roma)
10/11/2017, 11:00
I will introduce the problem of dark energy in cosmology. I will then show related forecasts for future constraints on scale-dependent parametrizations of galaxy bias and their impact on the estimate of cosmological parameters from the power spectrum of galaxies measured by spectroscopic redshift surveys. Aiming at assessing the impact of the bias I will show results from Fisher matrix...
Giovanni Losurdo
(INFN Pisa (Virgo collaboration))
23/11/2017, 12:00
Cristiano Guidorzi
(Dipartimento di Fisica e Scienze della Terra -- UniFe)
23/11/2017, 12:45
Roberto De Pietri
(Dipartimento di Fisica, UniParma)
23/11/2017, 14:30
Alessandro Drago
(Dipartimento di Fisica e Scienze della Terra -- UniFe)
23/11/2017, 15:15
Igor Kirillin
(Akhiezer Institute of Theoretical Physics, Kharkov, Ucraine)
27/11/2017, 16:00
If a high-energy charged particle penetrates through a crystal having a small angle ψ between its momentum and one of the main crystallographic axes (z-axis), correlations between successive collisions of the particle with neighboring atoms may occur. In this case motion of the particle is defined by the continuous potential of atomic strings. In this potential particle motion in the plane (x,...
Marco Antonelli
(Dipartimento di Fisica dell' Universita' degli Studi di Milano)
29/11/2017, 17:30
Pulsar glitches, sudden jumps in frequency in otherwise steadily spinning down pulsars, offer a glimpse into the superfluid interior of neutron stars.
Within the accepted scenario these timing irregularities are explained in terms of an instability of the superfluid vortices that permeate the crustal region of the star. We propose a method to constrain the mass of glitching pulsars, using...
Rémy Battesti
(Laboratoire National des Champs Magnetiques Intenses, Toulouse, France)
05/12/2017, 11:30
In physics, vacuum has historically been defined as a region of space where light travels at the well-known calculated constant, c. In the early 20th century, the quantization of electromagnetism led to the development of the now well-tested theoretical framework of quantum electrodynamics (QED). An interesting, yet untested, prediction of QED is the non-constant, even anisotropic, propagation...
Pablo Fernández
(IFIC - Valencia)
06/12/2017, 15:00
Neutrino oscillations experiments have measured the flavour oscillation parameters to high precision. Neutrino oscillations can be a probe for new physics, especially at the very high energies now reached by Large Volume Neutrino Telescopes (LVNTs), such as IceCube and KM3NeT. Although originally the main purpose of LVNTs was not to determine flavour oscillation parameters, they can help...
Mgr Inż. Dominika Kuźma
(Institute of Nuclear Physics of the Polish Academy of Sciences, Cracow (Poland) (within the joint PhD Programme Cracow-Ferrara))
12/12/2017, 14:30
We investigate the configurational antiferro- to ferro- magnetic (AF-F) transitions, triggered by an applied field, in macrospin chains from a dynamical perspective.
By means of the dynamical matrix approach, we calculate the spin wave frequency and profile across these transitions, and show the occurrence of soft modes and their role in the transition.
We show how the soft mode dispersion...
Sergio Fabiani
(INAF - IAPS (Roma))
14/12/2017, 10:00
The Imaging X-ray Polarimetry Explorer (IXPE) has been selected by NASA as the next SMEX (Small Explorer) mission to be flown in 2021. It will perform imaging polarimetry resolved in energy and time. IXPE is a break-through in High Energy Astrophysics promising to ’re-open’, after 40 years, the window in X-ray astronomy to measure directly the geometrical parameters of many different classes...
Albino Perego
(Dipartimento di Fisica, Università degli Studi di Milano Bicocca)
21/12/2017, 14:00
The detection of the first GW signal from a compact binary merger compatible with a binary neutron star (BNS), and of its electromagnetic counterparts marked the beginning of the multimessenger astronomy era.
This detection has confirmed that the merger of a BNS is a unique laboratory for physics at the extreme, where all fundamental interactions play a key role. In this talk, after a broad...
