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GW170817 and multimessenger astronomy: the research in Padua
Wednesday, 25 October 2017 from to (Europe/Rome)
at Dipartimento di Fisica e Astronomia - DFA ( Aula B )
at Dipartimento di Fisica e Astronomia - DFA ( Aula B )
Via Marzolo, 8 35121 Padova PD
Go to day
Speaker: Livia Conti (PD)
Merging reveals the innards of neutronstars
Neutrons stars are the endpoint of the evolution of massive stars. The equation of state (EoS) of matter at neutron star nuclear density (1e14-1e15 g/cm^3) is still poorly known and so is the maximum mass of a stable neutron star. GW170817/SSS17a offers an unprecedented opportunity to place tight constraints on neutron star matter EoS and foster our understanding of these fascinating objects.
Speaker: Prof. Roberto Turolla (Dept. of Physics and Astronomy, University of Padova) Material: Slides
The dawn of gravitational wave astronomy
On September 14, 2015, the direct observation of a system of coalescing black holes thorough their gravitational waves emission marked the beginning of a new era for astronomy. Just two years later, observation of the gravitational wave signal by a pair of coalescing neutron stars enabled an unprecedented observational campaign of the same system throughout the whole electromagnetic spectrum. We now have a powerful, new complementary channel to observe our universe, enabling us to greatly enrich our picture of the Cosmo. I will briefly introduce gravitational waves, their observed and expected sources and the observatories we use (and will use) to detect them. I will conclude by reviewing the observations performed so far.
Speaker: Giacomo Ciani (PD) Material: Slides
Multimessenger astronomy with GW170817
Speaker: Giovanni Andrea Prodi (Università di Trento - TIFPA) Material: Slides
Observations of Gravitational Waves from a Binary Neutron Star Inspiral
On August 17 the Advanced LIGO and Advanced Virgo made the first observation of gravitational waves signal from a binary neutron star inspiral. GW170817 is the closest and most precisely localized gravitational-wave signal so far. The seminar will report about source properties estimated and astrophysical implications of this discovery
Speaker: Dr. Claudia Lazzaro (INFN Padova) Material: Slides
GW counterparts with Fermi and Integral: the case of GRB170817A
The association of the short GRB 170817A with the GW event in the same date opens a new era in multimessenger astrophysics. I will describe the observations by Fermi and Integral, and discuss the prospects for the future.
Speaker: Dr. Riccardo Rando (Univ & INFN Padova) Material: Slides
EM follow-up: optical, infrared, UV, X rays, radio
I will summarise the wealth of electro-magnetic follow-up observations obtained in the two weeks after the trigger of Aug 17. I will try to focus on the reference data and highlights the key information that can be derived from the current preliminary analysis.
Speaker: Dr. Enrico Cappellaro (INAF - Osservatorio Astronomico di Padova) Material: Slides
Short GRB and kilonova: did observations meet our theoretical predictions?
I will provide a theoretical background on the association of these two spectacular astrophysical events with binary neutron star mergers and discuss our understanding of the underlying physical processes before and after GW170817.
Speaker: Dr. Riccardo Ciolfi (INAF - Osservatorio Astronomico di Padova) Material: Slides
A tale of two (relatively) massive stars
The spectacular data of GW170817 re-open the discussion about the formation channels of merging neutron stars. According to our current understanding, the progenitors of GW170817 were two relatively massive stars (~ 9 - 20 Msun) which have evolved together for a long time (few Gyr) and went through a number of evolutionary stages. The physics of these evolutionary stages is still far from being understood but the new detection can help us getting a clue about it. Some additional precious insights come from the environment where this system happened to merge: an early-type galaxy, with mostly old stellar population.
Speaker: Dr. Michela Mapelli (INAF - Osservatorio Astronomico di Padova & University of Innsbruck) Material: Slides
What gravitational waves can tell us about Cosmology?
The recent exciting detection of GW170817 can open up a new branch in Cosmology. I will summarize what gravitational waves can tell us about Cosmology, some of the cosmological implications that are already in place, and what future holds.
Speaker: Nicola Bartolo (PD) Material: Slides
First time of TeV emission from a blazar in close coincidence with a neutrino event observed with the MAGIC telescope
Speaker: Michele Doro (PD) Material: Slides
Prospects for multimessenger astrophysics & discussion
Speaker: Giovanni Andrea Prodi (Università di Trento - TIFPA)
- 15:00 - 15:05 Introduction 5'