Observational and Theoretical Strategies to Inquire about the Physics and Symmetries of Standard and Exotic Compact Objects

A special issue of Symmetry (ISSN 2073-8994). This special issue belongs to the section "Physics".

Deadline for manuscript submissions: closed (31 August 2024) | Viewed by 2153

Special Issue Editors


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Guest Editor
Scuola Superiore Meridionale, Naples, Italy
Interests: theoretical general relativity; Poynting-Robertson effect

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Guest Editor
Dipartimento di Fisica “Ettore Pancini”, Università degli Studi di Napoli “Federico II”, Complesso Universitario di Monte Sant'Angelo, Via Cinthia, 21, 80126 Napoli, Italy
Interests: gravitation theory; cosmology; astrophysics
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Special Issue Information

Dear Colleagues,

The actual breakthrough discoveries in high-energy astrophysics represented by the direct detection of gravitational waves and images of matter moving around a black hole led to significant developments in relativistic astrophysics. Indeed, new methodologies to investigate the physics and symmetries of standard (black holes and neutron stars) and exotic (wormholes, boson stars, etc.) compact objects have been and are still being proposed due to present and near-future sensitive data to be benchmarked with the outcomes from theoretical models. 

This Special Issue aims to gather original observational and theoretical strategies in relativistic astrophysics with the goal to increase our knowledge around the physics of standard and exotic compact objects. An important issue is also represented by the symmetries imposed on the mathematical solutions to describe the aforementioned astrophysical objects. We cordially invite researchers to contribute their original and high-quality research papers which will inspire advances in observational and theoretical relativistic astrophysics. Potential topics include but are not limited to:

  • Symmetry in compact objects
  • Ray-tracing techniques and images
  • Shadow of a compact object
  • Accretion disk dynamics
  • Quasi-periodic oscillations
  • Analytical methods and results
  • Numerical relativity
  • Observational data analysis
  • Gravitational waves
  • Quasi-normal modes
  • Radiation processes
  • Magnetic fields

Dr. Vittorio De Falco
Dr. Daniele Vernieri
Guest Editors

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Keywords

  • accretion, accretion disks
  • black hole physics
  • chaos
  • dense matter
  • dynamo
  • equation of state
  • exotic compact objects
  • gravitation
  • gravitational lensing: strong
  • gravitational waves
  • hydrodynamics magnetohydrodynamics (MHD)
  • line: profiles
  • magnetic fields and magnetic reconnection
  • methods: analytical, data analysis, observational, numerical, miscellaneous
  • neutrinos
  • plasmas
  • radiation: dynamics and mechanisms: general
  • radiative transfer
  • relativistic processes
  • stars: neutron

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Published Papers (1 paper)

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Research

15 pages, 481 KiB  
Article
Accretion/Ejection Phenomena and Emission-Line Profile (A)symmetries in Type-1 Active Galactic Nuclei
by Paola Marziani
Symmetry 2023, 15(10), 1859; https://doi.org/10.3390/sym15101859 - 3 Oct 2023
Cited by 4 | Viewed by 1093
Abstract
The distinct behaviors of blue- and redshifted broad emission-line shifts, emitted by ionic species with varying ionization potentials in active galactic nuclei (AGN), can be elucidated by considering the balance between radiation and gravitational forces along the quasar main sequence. Blueshifts are attributed [...] Read more.
The distinct behaviors of blue- and redshifted broad emission-line shifts, emitted by ionic species with varying ionization potentials in active galactic nuclei (AGN), can be elucidated by considering the balance between radiation and gravitational forces along the quasar main sequence. Blueshifts are attributed to outflowing motions of the line-emitting gas toward the observer, and they are most pronounced in AGN with high Eddington ratios (Population A) and high luminosities. Conversely, redshifts in the broad-line wings are observed in Balmer emission lines of sources radiating at low Eddington ratios (Population B), though the origin of these redshifts remains a subject of ongoing debate. A correlation linking the redward asymmetry as measured by the centroid shift of the Hβ line profile to the black hole mass lends support to the notion that these shifts arise from gravitational and transverse redshift effects, particularly for black hole masses MBH108.7 M. Full article
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