1. The Quest for Gravitational Waves: a global strategy
Eugenio Coccia
U. of Rome “Tor Vergata”
INFN Gran Sasso Science Institute
Past Chair Gravitational Wave International Committee

2. https://gwic.ligo.org/
GWIC is now an IUPAP Working group (WG11)
Sheila Rowan (Glasgow) is the new Chair since August 2015

6. 2030? From LISA to eLISA eLISA Savings mainly in weight, launch cost.
Two active arms, not three;
Smaller arms (1Gm, not 5Gm);
Re-use LISA Pathfinder hardware;
2030?

7. THE GWIC GLOBAL PLAN
Advanced Detectors (LIGO, VIRGO) will initiate gravitational wave astronomy through the detection of the most luminous sources - compact binary mergers.
Third Generation Detectors (ET and others) will expand detection horizons and provide new tools for extending knowledge of fundamental physics, cosmology and relativistic astrophysics.
Observation of low frequency gravitational wave with eLISA will probe the role of super-massive black holes in galaxy formation and evolution

8. for the operation of the LIGO-Virgo network over the next decade
Plausible scenario
for the operation of the LIGO-Virgo network over the next decade

10. Localization expected for a BNS system
2016/17
2017/18
80 Mpc
2019+
2022+
160 Mpc
Localization expected for a BNS system
The ellipses show 90% confidence localization areas, and the red crosses show
regions of the sky where the signal would not be condently detected.

12. 8 Recommendations to GWIC to guide the development of the field
8.5 Toward a third-generation global network
“Background— The scientific focus of a third-generation global network will be gravitational wave astronomy and astrophysics as well as cutting edge
aspects of basic physics. Third-generation underground facilities are aimed at having excellent sensitivity from ~1 Hz to ~104 Hz. As such, they will greatly expand the new frontier of gravitational wave astronomy and astrophysics.
In Europe, a three year-long design study for a third-generation gravitational wave facility, the Einstein Telescope (ET), has recently begun with funding from the European Union.

13. The Einstein GW Telescope
The ET project aims to the realization of a 3rd generation GW observatory
The conceptual design phase has been performed in the years, thanks to the support (3M€) of the European Commission under the FP7-design studies framework
The design document has been delivered in July 2011
~400 pages describing the main characteristics of the observatory
ET-Flagship

14. ET International collaboration
Participant
Country
EGO
Italy
France
INFN
MPG
Germany
CNRS
University of Birmingham UK
University of Glasgow
Nikhef NL
Cardiff University
The initial seed of the ET collaboration was (2008) composed by the scientists of the 8 proposing institutes
ET-Flagship

15. ET International collaboration
Now the ET science team includes more than 220 physicists
ET Author list:
ET-Flagship

16. Beyond Advanced Detectors
Let suppose to gain a factor 10 wrt the Advanced detectors: What could we do?
Astrophysics:
Measure in great detail the physical parameters of the stellar bodies composing the binary systems
NS-NS, NS-BH, BH-BH
Constrain the Equation of State of NS through the measurement
of the merging phase of BNS
of the NS stellar modes
of the gravitational continuous wave emitted by a pulsar NS
Contribute to solve the GRB enigma
Relativity
Compare the numerical relativity model describing the coalescence of intermediate mass black holes
Test General Relativity against other gravitation theories
Cosmology
Measure few cosmological parameters using the GW signal from BNS emitting also an e.m. signal (like GRB)
Probe the first instant of the universe and its evolution through the measurement of the GW stochastic background
Astro-particle:
Contribute to the measure the neutrino mass
Constrain the graviton mass measurement
ET-Flagship