Project of the Virtual Institute of Astroparticle Physics (VIA)

A special issue of Universe (ISSN 2218-1997). This special issue belongs to the section "Cosmology".

Deadline for manuscript submissions: closed (15 July 2022) | Viewed by 2611

Special Issue Editors


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Guest Editor
1. Moscow Engineering Physics Institute (MEPHI), National Research Nuclear University (NRNU), Kashirskoe shosse 31, 115409 Moscow, Russia
2. Virtual Institute of Astroparticle Physics, University of Paris, CNRS, Astroparticle and Cosmology, F-75013 Paris, France
Interests: cosmoparticle physics; dark matter; cosmic rays; primordial black holes; particle physics
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
1. Institute of Physics, Southern federal University (SFedU), Rostov on Don, Russia
2. Virtual Institute of Astroparticle Physics, University of Paris, CNRS, Astroparticle and Cosmology, F-75013 Paris, France
Interests: particle physics; dark matter; physics beyond the standard model; astrophysics and cosmology

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Guest Editor
1. President and Full Professor, Center for Cosmoparticle Physics "Cosmion", National Research Nuclear University "Moscow Engineering Physics Institute", Moscow, Russia
2. Virtual Institute of Astroparticle Physics, 75018 Paris, France
3. Principal Researcher, Institute of Physics, Southern Federal University, Rostov on Don, Russia
Interests: cosmology; particle physics; beyond standard models; cosmoparticle physics; dark matter; primordial black holes; antimatter
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Guest Editor
1. Virtual Institute of Astroparticle Physics, University of Paris, CNRS, Astroparticle and Cosmology, F-75013 Paris, France
2. Moscow Engineering Physics Institute (MEPHI), National Research Nuclear University (NRNU), Moscow, Russia
Interests: high energy astrophysics; dark matter; theoretical cosmology and particle physics

Special Issue Information

Dear Colleagues,

The recent exciting progress in precision cosmology and cosmic ray physics (high energy gamma and charged particle) as well as the forthcoming developments in particle physics (LHC) and multimessenger astronomy involving, together with the observation in the whole range of electromagnetic spectrum detection of gravitational waves, cosmic-ray components and neutrinos, promise a large amount of new information and discoveries in the coming years.

The results of these experiments have a direct impact on the development of astroparticle models, which also give direct feedback to the running experiments for the search of new effects or particles following from these models.

Theoretical analysis of these results will have an impact on the fundamental knowledge on the structure of the microworld and universe and on the fundamental physical laws of nature.

The Virtual Institute of Astroparticle Physics (VIA) aims to support the development of this rapidly developing field.

The activity of the Institute takes place through its website http://viavca.in2p3.fr/site.html in a form of:

  • A regular series of lectures on the main problems and newest results in astroparticle physics, cosmology, particle physics, astrophysics, and related topics;
  • Support for online remote presentations and transmissions or streaming of talks at seminars and conferences;
  • Open online courses on cosmoparticle physics supported by supervision of works on students’ thesis’ on VIA Forum and their remote evaluation;
  • Regular online meetings and collaborative work of the SFEDU Laboratory of cosmoparticle studies of structure and dynamics of Galaxy;
  • Continuous storage of records of VIA videoconferences on VIA library and support of the platform for their discussion on VIA Forum.

Collaboration with Universe will provide a basis for propagation of news and results of studies of fundamental relationship of cosmology and particle physics, including but not limited to the physical nature of inflation, baryosynthesis, dark matter/energy, multimessenger cosmological probes of this relationship in primordial gravitational waves, primordial black holes and other primordial structures, and direct and indirect effects of various components of dark matter in combination with direct and indirect experimental probes for new physics. The involvement of young scientists in this research would be of special interest. The year 2021 has been announced by UNESCO as the year of A. D. Sakharov, and development of his legacy in cosmoparticle physics can take special place both in the program of VIA events and in Universe.

Prof. Dr. Konstantin Belotsky
Prof. Dr. Vitaly Beylin
Prof. Dr. Maxim Yu. Khlopov
Prof. Dr. Dmitri Semikoz
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Universe is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • cosmology
  • particle physics
  • beyond the Standard model
  • inflation
  • baryosynthesis
  • dark matter
  • dark energy
  • multimessenger cosmology
  • cosmological phase transitions
  • primordial black holes
  • gravitational waves
  • multimessenger astronomy

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Published Papers (1 paper)

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Research

11 pages, 1016 KiB  
Article
Dynamics and Merger Rate of Primordial Black Holes in a Cluster
by Viktor D. Stasenko, Alexander A. Kirillov and Konstantin M. Belotsky
Universe 2022, 8(1), 41; https://doi.org/10.3390/universe8010041 - 11 Jan 2022
Cited by 1 | Viewed by 1591
Abstract
The PBH clusters can be sources of gravitational waves, and the merger rate depends on the spatial distribution of PBHs in the cluster which changes over time. It is well known that gravitational collisional systems experience the core collapse that leads to significant [...] Read more.
The PBH clusters can be sources of gravitational waves, and the merger rate depends on the spatial distribution of PBHs in the cluster which changes over time. It is well known that gravitational collisional systems experience the core collapse that leads to significant increase of the central density and shrinking of the core. After core collapse, the cluster expands almost self-similarly (i.e., density profile extends in size without changing its shape). These dynamic processes affect the merger rate of PBHs. In this paper, the dynamics of the PBH cluster is considered using the Fokker–Planck equation. We calculate the merger rate of PBHs on cosmic time scales and show that its time dependence has a unique signature. Namely, it grows by about an order of magnitude at the moment of core collapse which depends on the characteristics of the cluster, and then decreases according to the dependence Rt1.48. It was obtained for monochromatic and power-law PBH mass distributions with some fixed parameters. Obtained results can be used to test the model of the PBH clusters via observation of gravitational waves at high redshift. Full article
(This article belongs to the Special Issue Project of the Virtual Institute of Astroparticle Physics (VIA))
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