In this issue:
  • Joint ECFA-NuPECC-APPEC Activities
  • Snowmass2021 - Community Planning Meeting
  • Interview with Michele Punturo and Frank Linde
  • Interview with Giovanni Losurdo
  • Pinning-Down the Sources of the Highest-Energy Cosmic Rays
  • Virgo and LIGO unveil new and unexpected black hole populations
  • Science Vision and Infrastructure Roadmap for European Astronomy
  • Upcoming events
Joint ECFA – NuPECC – APPEC Activities
The nuclear, particle and astroparticle physics communities, represented by the three committees/ consortia NuPECC, ECFA and APPEC want to join their forces not only to solve the questions on the smallest and the largest structures in nature but also to improve on diversity, working conditions and societal impact. In this article we give an update on ongoing activities.
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Update on the Snowmass2021 - Community Planning Meeting
During the week of October 4-8, the “Community Planning Meeting” (CPM2020) for the Snowmass 2021 took place. The aim was to developed the plans and the steps to take until the Community Summer Study (CSS) in July 2021. The Snowmass21 process is leading to the final report, expected in October 2021.
The CPM2020 was held virtually, with over 3000 participants from the whole world. The overall program, presentations and recordings are available at
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ET - the future of Gravitational Wave observation in Europe
During the last year the Einstein Telescope (ET) Collaboration was busy with the preparation for an ESFRI Roadmap proposal which was just submitted. This is an enormously important step for the realization of the project and was a lot of work for the whole collaboration. In this interview we will discuss with Michele Punturo and Frank Linde the status of the ET project and the way to its completion.
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Gravitational Wave detection GW190521 - an unexpected discovery
On 2 September the Virgo and LIGO collaborations published their discovery of the most massive Black Hole ever measured with Gravitational Waves. This is another huge milestone in the field of Gravitational Wave observations. The particularity of this measurement and its impact on our understanding and knowledge of Black Holes will be explained to us by Giovanni Losurdo, spokesperson of the Virgo collaboration.
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Pinning-Down the Sources of the Highest-Energy Cosmic Rays
The Pierre Auger Collaboration has reported a measurement of the spectrum of cosmic-rays above 2.5 x 1018 eV made with unprecedented precision. A new spectral feature has been identified just above 1019 eV which is found to be independent of the direction from which the particles arrive. Taken together, the observations exclude the hypothesis that the highest-energy cosmic-rays come from a small number of nearby sources and that protons dominate in the particle beam.
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Virgo and LIGO unveil new and unexpected black hole populations
Virgo and LIGO have announced the detection of an extraordinarily massive merging binary system: two black holes of 66 and 85 solar masses, which generated a final black hole of around 142 solar masses. The remnant black hole is the most massive ever detected with gravitational waves.
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An update on the new Science Vision and Infrastructure Roadmap for European Astronomy
Work has continued to develop a new, combined Science Vision and Infrastructure Roadmap, looking at the next 20 years of European astronomy, building upon the previous versions & updates delivered by Astronet. It is planned to publish this in early 2021.
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PhD open positions at the International Helmholtz-Weizmann Research School on Multimessenger Astronomy
Multimessenger astronomy, the exploration of the Universe using information from a multitude of cosmic messengers, including electromagnetic radiation, neutrinos and gravitational waves, has lead to several groundbreaking discoveries during the last few years with significant contributions from the partner institutions (DESY, Humboldt University, University of Potsdam and the Weizmann Institute of Science in Israel).
PhD students will work with leading scientists in the field of multimessenger astronomy and benefit from their complementary expertise in theory and experiments involving the various messengers. Collaboration between students and researchers at the partner institutions is facilitated through a lively exchange program. The professional training of students includes data science as a supporting component of the school.
Application time: 01.10.2020 - 08.11.2020. For more information including how to apply go to
IceCube-Gen2 will open a new window on the universe
In a white paper recently submitted to the Journal of Physics G, the international IceCube-Gen2 Collaboration outlines the need for and design of a next-generation extension of IceCube. By adding new optical and radio instruments to the existing detector, IceCube-Gen2 will increase the annual rate of cosmic neutrino observations by an order of magnitude, and its sensitivity to point sources will increase to five times that of IceCube.
Cosmic Cataclysm allows precise test of General Relativity
In 2019, the MAGIC telescopes detected the first Gamma Ray Burst at very high energies. This was the most intense gamma-radiation ever obtained from such a cosmic object. But the GRB data have more to offer: with further analyses, the MAGIC scientists could now confirm that the speed of light is constant in vacuum – and not dependent on energy. So, like many other tests, GRB data also corroborate Einstein’s theory of General Relativity. The study has now been published in Physical Review Letters:
PeVatrons: The Hunt for the Origin of Galactic Cosmic Rays with CTA
Understanding the origin of cosmic rays using direct measurements is an impossible task due to the presence of interstellar magnetic fields that deviate the path of these charged particles before they reach Earth. Neutral messengers generated by cosmic-ray interactions, such as gamma rays and neutrinos, are used to determine the origin of cosmic rays. CTA will  be a unique instrument for PeVatron hunting, capable of detecting with unprecedented sensitivity and accuracy TeV gamma rays produced by PeV cosmic rays. Read more about the hunt for the origin of galactic cosmic rays here:
Upcoming events
The Covid-19 situation still affects many upcoming events. Please check the websites for up-to-date information.
Conferences & other events
You can also find schools and events on the APPEC website.
 APPEC meetings
  • General Assembly Meeting, 9 Dezember 2020, online
  • APPEC Town Meeting, postponed, Berlin Germany
  • APPEC Tech Forum postponed until 1-2 June 2021, Prague, Czech Republic

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