From elia.battistelli at roma1.infn.it  Wed Nov  8 17:18:25 2017
From: elia.battistelli at roma1.infn.it (Elia Battistelli)
Date: Wed, 08 Nov 2017 17:18:25 +0100
Subject: [astroseminar@Sapienza] 17/11/17 at 16:00: Filippo Ambrosino -
	Alessandro Papitto
Message-ID: <08757714709ef8477f173a3aadbeee60@roma1.infn.it>

Title: First detection of optical pulsations from the transitional 
millisecond pulsar PSR J1023+0038 with SiFAP at TNG.
Speaker:  Filippo Ambrosino (INAF - IAPS, SAPIENZA Universit? di Roma), 
Alessandro Papitto (INAF - OAR)
Date: Friday, 17 November 2017
Time: 4:00pm
Location: Aula Conversi, Marconi Building, Dept. of Physics, Sapienza 
University

Abstract:
The recent advent of solid state detectors originally developed for 
high energy physics, completely revolutioned astrophysical measurements. 
An ultra fast photometer based on the Silicon Photo Multiplier 
technology (SiFAP, Silicon Fast Astronomical Photometer), capable of the 
single photon detection in the Optical band (320-900 nm) with a time 
resolution down to 25 ns, was developed at the Department of Physics of 
Sapienza Universit? di Roma since 2009 to study astrophysical variable 
sources. In this talk, we will discuss the recent discovery of optical 
pulsations from the transitional millisecond pulsar PSR J1023+0038 
(Ambrosino, Papitto et al. 2017, Nature Astronomy), achieved using the 
SiFAP at the 3.6 m INAF telescope Galileo. Tranistional millisecond 
pulsars are able to swing over a few weeks between an X-ray pulsar 
regime powered by the accretion of matter onto the neutron star, and a 
radio pulsar state powered by magnetospheric particle acceleration. The 
implication of this unexpected discovery on our understanding of 
transitional pulsar mechanism will be discussed.

web: https://agenda.infn.it/conferenceDisplay.py?confId=14404




From elia.battistelli at roma1.infn.it  Mon Nov 20 10:39:24 2017
From: elia.battistelli at roma1.infn.it (Elia Battistelli)
Date: Mon, 20 Nov 2017 10:39:24 +0100
Subject: [astroseminar@Sapienza] today at 14:00: Valerio Ippolito
Message-ID: <b2fdaee4a9f15d4a61eda0950963bbd2@roma1.infn.it>

Title: How dark is Dark: the Dark Matter quest at ATLAS
Speaker:  Valerio Ippolito
Institution: INFN Roma 1
Date: Monday, 20 November 2017
Time: 2:00pm
Location: Aula Conversi, Marconi Building, Dept. of Physics, Sapienza 
University

Abstract:
What is Dark Matter composed of? Does it interact non-gravitationally 
with ordinary particles - and if it does, how and to what extent can 
high-energy physics shed light on its particle nature? We will discuss 
how the physics programme of the ATLAS experiment at the LHC may answer 
these questions in the post-Higgs-boson-discovery era.

web: https://agenda.infn.it/conferenceDisplay.py?confId=14309




From elia.battistelli at roma1.infn.it  Mon Nov 20 10:42:18 2017
From: elia.battistelli at roma1.infn.it (Elia Battistelli)
Date: Mon, 20 Nov 2017 10:42:18 +0100
Subject: [astroseminar@Sapienza] 27/11/2017 at 15:00: Daniele Fargion
Message-ID: <5362dc22518190084900749f1c1ffa93@roma1.infn.it>

Title: Could GRB170817A be really correlated to a NS-NS merging?
Speaker:  Daniele Fargion
Institution: Sapienza Physics Department & INFN Rome1
Date: Monday, 27 November 2017
Time: 3:00pm
Location: Aula Rasetti, Marconi Building, Dept. of Physics, Sapienza 
University

Abstract:
The GW 170817 and GRB170817A occurred within a short time almost in the 
same sky windows.
It has been the nearest Short GRB observed, the first NS NS collapse 
merging, the softer SGRB, the weakest one and the first GRB GW 
correlated event within just a year or even a month of detection. An 
amazing lucky event hard to be accepted at first view.
Moreover the huge spread (8 order of magnitude) in apparent luminosity 
among thousands GRB call for a thin blazing jet source able to embrace 
(with the same NS-NS or NS-BH collapse) the vast variability observed by 
its geometry (in axis , off axis) view. May the case of GRB170817 be 
associated to such an extreme off axis detection?
Many authors and us agree on this possibility.
However there maybe an additional unexpected novel geometry in GRB 
explosion making the GRB observation at near distance much more 
probable: a twin gamma disk-cone blazing in wide solid angles in 
addition to the inner thin precessing jets event.

web: https://agenda.infn.it/conferenceDisplay.py?confId=14519




From elia.battistelli at roma1.infn.it  Mon Nov 20 10:48:14 2017
From: elia.battistelli at roma1.infn.it (Elia Battistelli)
Date: Mon, 20 Nov 2017 10:48:14 +0100
Subject: [astroseminar@Sapienza] 23/11/2017 at 10:00-18:00: Stato e
 Prospettive della Fisica delle Astroparticelle
Message-ID: <2b1efbcf33152de4fad47b60993aaf94@roma1.infn.it>

Title: Stato e Prospettive della Fisica delle Astroparticelle
Chairs: Capone, Antonio - Morselli, Aldo - De Vincenzi, Mario - Vecchi, 
Manuela
Institution: Sapienza Physics Department & INFN Rome1
Date: Thursday, 23 November 2017
Time: 10:00am
Location: Aula COnversi, Marconi Building, Dept. of Physics, Sapienza 
University

Abstract:
L'evento ? rivolto a ricercatori e studenti e ha l'obiettivo di 
presentare una panoramica dell'area di ricerca in fisica delle 
astroparticelle, che studia l'Universo combinando le informazioni 
ottenute con diversi "messaggeri" quali raggi cosmici, neutrini, raggi 
gamma e onde gravitazionali. Saranno presentati gli ultimi risultati 
degli esperimenti attualmente in fase di presa dati, nello spazio e a 
Terra, e saranno discusse le prospettive future di estensione dei 
progetti attuali o di progettazione di nuovi rivelatori. Verr? inoltre 
discussa l'interpretazione dei risultati con particolare attenzione 
all'approccio "multi-messaggero", necessario per una comprensione 
profonda dei meccanismi altamente energetici nell'Universo. L'evento 
verr? cofinanziato dal Dipartimento di Fisica dell'Universit? di Roma 
"Sapienza" e da ARAP (Associaziona Romana per le AstroParticelle). La 
partecipazione all?evento ? gratuita, ma ? richiesta l'iscrizione sulla 
pagina indico dell?evento : astrop17.roma1.infn.it

web: https://agenda.infn.it/conferenceDisplay.py?confId=14311




From elia.battistelli at roma1.infn.it  Tue Nov 21 09:50:46 2017
From: elia.battistelli at roma1.infn.it (Elia Battistelli)
Date: Tue, 21 Nov 2017 09:50:46 +0100
Subject: [astroseminar@Sapienza] 24/11/2017 at 16:00: Francesco Sylos Labini
Message-ID: <a2003521fce2d6e0a536e7401b463f3b@roma1.infn.it>

Title: Transient spiral arms and galaxy rotation curves
Speaker:  Francesco Sylos Labini
Date: Friday, 24 November 2017
Time: 4:00pm
Location: Aula Conversi, Marconi Building, Dept. of Physics, Sapienza 
University

Abstract:
We describe how a simple class of out of equilibrium mass distributions 
evolve under their self-gravity to produce a quasi-planar spiral 
structure surrounding a virialized core, qualitatively resembling a 
spiral galaxy. The spiral structure is transient, but can survive tens 
of dynamical times, and further reproduces qualitatively noted features 
of spiral galaxies as the predominance of trailing two-armed spirals and 
large pitch angles. The mechanism leads generically to a characteristic 
transition from predominantly rotational motion, in a region outside the 
core, to radial ballistic motion in the outermost parts. Such radial 
motions are excluded in our Galaxy up to 15 kpc, but could be detected 
at larger scales in the future by GAIA. We explore the apparent motions 
seen by external observers of the velocity distributions of our toy 
galaxies, and find that it is difficult to distinguish them from those 
of a rotating disc with sub-dominant radial motions at levels typically 
inferred from observations. These simple models illustrate the 
possibility that the observed apparent motions of spiral galaxies might 
be explained by non-trivial non-stationary mass and velocity 
distributions without invoking a dark matter halo or modification of 
Newtonian gravity. In this scenario the observed phenomenological 
relation between the centripetal and gravitational acceleration of the 
visible baryonic mass could have a simple explanation.

web: https://agenda.infn.it/conferenceDisplay.py?confId=14596




From elia.battistelli at roma1.infn.it  Wed Nov 22 12:07:15 2017
From: elia.battistelli at roma1.infn.it (Elia Battistelli)
Date: Wed, 22 Nov 2017 12:07:15 +0100
Subject: [astroseminar@Sapienza] 24/11/2017 at 13:00: Jorge Rueda
Message-ID: <a0320cae6479b5df372c224088eeef39@roma1.infn.it>

Title: Some considerations on short gamma-ray bursts, their associated 
kilonovae and the physics of neutron star binary mergers
Speaker:  Jorge Rueda
Institution: ICRA and ICRANet
Date: Monday, 24 November 2017
Time: 1:00pm
Location: Aula Rasetti, Marconi Building, Dept. of Physics, Sapienza 
University

Abstract:
Following our identification of the first neutron star binary merger 
leading to a black hole in GRB 090510A (Ruffini et al. 2016), we 
indicate the striking coincidence with the X-ray observations GRB 
130613B (Ruffini et al. GCN 14913, 2017), which has become the first 
typical example of a neutron star merger with associated  kilonova 
observed in the optical and in the infrared (Tanvir et al. 2013; Berger 
et al. 2013a; Fan et al. 2013). Observations of the optical emission of 
GRB 090510A have been recovered and here analyzed within this context. 
We also show ongoing work on the role of the conservation of energy, 
angular momentum and baryon number in the determination of the neutron 
star critical mass and so on the determination of the final remnant 
configuration left by a neutron star binary merger.

Questo seminario fa parte di una serie di incontri tipo "brown bag 
lunch?. 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.




From elia.battistelli at roma1.infn.it  Mon Nov 27 10:46:19 2017
From: elia.battistelli at roma1.infn.it (Elia Battistelli)
Date: Mon, 27 Nov 2017 10:46:19 +0100
Subject: [astroseminar@Sapienza] today at 15:00: Daniele Fargion
Message-ID: <c20156427b21177d8686baa11e4d7661@roma1.infn.it>

Title: Could GRB170817A be really correlated to a NS-NS merging?
Speaker:  Daniele Fargion
Institution: Sapienza Physics Department & INFN Rome1
Date: Monday, 27 November 2017
Time: 3:00pm
Location: Aula Rasetti, Marconi Building, Dept. of Physics, Sapienza 
University

Abstract:
The GW 170817 and GRB170817A occurred within a short time almost in the 
same sky windows.
It has been the nearest Short GRB observed, the first NS NS collapse 
merging, the softer SGRB, the weakest one and the first GRB GW 
correlated event within just a year or even a month of detection. An 
amazing lucky event hard to be accepted at first view.
Moreover the huge spread (8 order of magnitude) in apparent luminosity 
among thousands GRB call for a thin blazing jet source able to embrace 
(with the same NS-NS or NS-BH collapse) the vast variability observed by 
its geometry (in axis , off axis) view. May the case of GRB170817 be 
associated to such an extreme off axis detection?
Many authors and us agree on this possibility.
However there maybe an additional unexpected novel geometry in GRB 
explosion making the GRB observation at near distance much more 
probable: a twin gamma disk-cone blazing in wide solid angles in 
addition to the inner thin precessing jets event.

web: https://agenda.infn.it/conferenceDisplay.py?confId=14519




From elia.battistelli at roma1.infn.it  Tue Nov 28 11:40:40 2017
From: elia.battistelli at roma1.infn.it (Elia Battistelli)
Date: Tue, 28 Nov 2017 11:40:40 +0100
Subject: [astroseminar@Sapienza] 01/12/2017 at 13:00: Andreas Krut
Message-ID: <4d90d5792e3a20b3d4a951ad8fd9ca6b@roma1.infn.it>

Title: Novel constraints on fermionic dark matter from the Galactic 
observables
Speaker:  Andreas Krut
Institution: ICRANet
Date: Tuesday, 1 December 2017
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.




From elia.battistelli at roma1.infn.it  Tue Nov 28 11:48:37 2017
From: elia.battistelli at roma1.infn.it (Elia Battistelli)
Date: Tue, 28 Nov 2017 11:48:37 +0100
Subject: [astroseminar@Sapienza] 01/12/2017 at 13:00: Andreas Krut
Message-ID: <9308a19ce92f1e803675c46b3d3e79b3@roma1.infn.it>

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.




From elia.battistelli at roma1.infn.it  Tue Nov 28 11:50:47 2017
From: elia.battistelli at roma1.infn.it (Elia Battistelli)
Date: Tue, 28 Nov 2017 11:50:47 +0100
Subject: [astroseminar@Sapienza] 29/11/2017 at 14:00: Marek J. Szczepanczyk
Message-ID: <c13f58e997274e0563c9ff6f5e939d28@roma1.infn.it>

Title: Multi-messenger Signal from Supernovae Explosion
Speaker:  Marek J. Szczepanczyk
Institution: Embry-Riddle Aeronautical University
Date: Wednesday, 29 November 2017
Time: 2:00pm
Location: Aula Rasetti, Marconi Building, Dept. of Physics, Sapienza 
University

Abstract:
Core-Collapse Supernovae (CCSNe) are the spectacular and violent deaths 
of massive stars. The study of Gravitational Waves (GW) from CCSNe can 
help elucidate the explosion mechanism and give us information about the 
physical properties of the collapsed core like Equation of State, 
neutrino mass hierarchy or unknown physics. In this talk I will review 
the state-of-art techniques used to search for GW from CCSNe and current 
work on detection perspectives with future GW Observatories. Their 
detection requires a deep understanding of multi-dimensional CCSN 
simulations, data analysis caveats, detector response, as well as the 
insights provided by neutrino and electromagnetic messengers. I will 
talk about properties of the CCSN waveforms, algorithm development that 
uses the deterministic features (like g-modes) used to increase the 
visible distance for CCSN detection. I will also review the detection 
range, future algorithm developments and detection capabilities with the 
designs of future detector configurations.

web: https://agenda.infn.it/conferenceDisplay.py?confId=14493



From elia.battistelli at roma1.infn.it  Wed Nov 29 10:10:31 2017
From: elia.battistelli at roma1.infn.it (Elia Battistelli)
Date: Wed, 29 Nov 2017 10:10:31 +0100
Subject: [astroseminar@Sapienza] today at 14:00: Marek J. Szczepanczyk
Message-ID: <4d277dd50518b1f7ca7e0c7a4c953862@roma1.infn.it>

Title: Multi-messenger Signal from Supernovae Explosion
Speaker:  Marek J. Szczepanczyk
Institution: Embry-Riddle Aeronautical University
Date: Wednesday, 29 November 2017
Time: 2:00pm
Location: Aula Rasetti, Marconi Building, Dept. of Physics, Sapienza 
University

Abstract:
Core-Collapse Supernovae (CCSNe) are the spectacular and violent deaths 
of massive stars. The study of Gravitational Waves (GW) from CCSNe can 
help elucidate the explosion mechanism and give us information about the 
physical properties of the collapsed core like Equation of State, 
neutrino mass hierarchy or unknown physics. In this talk I will review 
the state-of-art techniques used to search for GW from CCSNe and current 
work on detection perspectives with future GW Observatories. Their 
detection requires a deep understanding of multi-dimensional CCSN 
simulations, data analysis caveats, detector response, as well as the 
insights provided by neutrino and electromagnetic messengers. I will 
talk about properties of the CCSN waveforms, algorithm development that 
uses the deterministic features (like g-modes) used to increase the 
visible distance for CCSN detection. I will also review the detection 
range, future algorithm developments and detection capabilities with the 
designs of future detector configurations.

web: https://agenda.infn.it/conferenceDisplay.py?confId=14493



