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Astronomy, Volume 3, Issue 4

December 2024 - 4 articles

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Articles (4)

  • Article
  • Open Access
1,676 Views
15 Pages

18 December 2024

For the deconfinement phase of an SU(2) Yang–Mills theory, we compute the axion mass mA by appealing to the Veneziano–Witten formula. The topological susceptibility χ arises (i) from a precisely computable thermal ground-state contrib...

  • Article
  • Open Access
1,214 Views
15 Pages

Towards the Particle Spectrum, Tickled by a Distant Massive Object

  • Mehdi Dehghani,
  • Salman A. Nejad and
  • Maryam Mardaani
Astronomy2024, 3(4), 304-318;https://doi.org/10.3390/astronomy3040019 
(registering DOI)

12 December 2024

To investigate the gravitational effects of massive objects on a typical observer, we studied the dynamics of a test particle following BMS3 geodesics. We constructed the BMS3 framework using the canonical phase space formalism and the corresponding...

  • Article
  • Open Access
1,219 Views
15 Pages

18 November 2024

Archival XMM and ROSAT X-Ray data are used to investigate the structure of the Abell 548–Abell 3367 region. Based on previous optical studies, this is a region likely to be rich in structure, although studies are in disagreement regarding the c...

  • Article
  • Open Access
2,181 Views
14 Pages

Separating the Spectral Counterparts in NGC 1275/Perseus Cluster in X-Rays

  • Elena Fedorova,
  • Lidiia Zadorozhna,
  • Anatolii Tugay,
  • Nadiia Pulatova,
  • Alexander Ganz and
  • Olexandr Gugnin

18 October 2024

We present a model-independent method for separating the spectral counterparts of the active galactic nucleus (AGN) NGC 1275 from the surrounding emission of the Perseus cluster, as observed by Suzaku/XIS cameras. The Perseus cluster emission extends...

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Astronomy - ISSN 2674-0346