Zobrazeno 1 - 10
of 577
pro vyhledávání: '"P. Berczik"'
Aims. We identify the possible dynamical connection between individual r-process-enhanced stars and the ultra-faint dwarf galaxy Reticulum II based on the current phase-space information for these stars and the dynamical mass-loss model of Reticulum
Externí odkaz:
http://arxiv.org/abs/2411.11134
Context. Many Milky Way globular clusters (GCs) host multiple stellar populations, challenging the traditional view of GCs as single-population systems. It has been suggested that second-generation stars could form in a disk from gas lost by first-ge
Externí odkaz:
http://arxiv.org/abs/2411.02303
Publikováno v:
Vol. 90 No. 3 (2024), 14-20: Recent Contributions to Physics (Rec.Contr.Phys.)
In this study, we investigate the contribution of millisecond pulsars (MSPs) to the gamma-ray excess observed in the Galactic Center by analyzing data from high-resolution direct N-body simulations of six globular clusters (GCs) that experience close
Externí odkaz:
http://arxiv.org/abs/2410.15857
Autor:
Khan, Fazeel Mahmood, Javed, Fiza, Holley-Bockelmann, Kelly, Mayer, Lucio, Berczik, Peter, Macciò, Andrea V.
Intermediate Mass Black Hole (IMBH) mergers with masses $10^4 - 10^6$ $M_{\odot}$ are expected to produce gravitational waves (GWs) detectable by the Laser Interferometer Space Antenna (LISA) with high signal to noise ratios out to redshift 20. IMBH
Externí odkaz:
http://arxiv.org/abs/2408.14541
Publikováno v:
A&A 689, A282 (2024)
Membership analysis is an important tool for studying star clusters. There are various approaches to membership determination, including supervised and unsupervised machine learning (ML) methods. We perform membership analysis using the supervised ma
Externí odkaz:
http://arxiv.org/abs/2407.19910
Based on the available observational data from the literature, we analysed the dynamics of the NGC 6240 galaxy central supermassive black hole (SMBH) system. For the dynamical modelling of this triple SBMH system, we used the massively parallel and G
Externí odkaz:
http://arxiv.org/abs/2407.00473
Autor:
Ishchenko, M., Berczik, P., Panamarev, T., Kuvatova, D., Kalambay, M., Gluchshenko, A., Veles, O., Sobolenko, M., Sobodar, O., Omarov, C.
Context. Based on the Gaia DR3, we reconstructed the orbital evolution of the known Milky Way globular clusters and found that six objects, NGC 6681, NGC 6981, Palomar 6, NGC 6642, HP 1, and NGC 1904, very likely interact closely with the nuclear sta
Externí odkaz:
http://arxiv.org/abs/2406.18987
Autor:
Ishchenko, Maryna, Kovaleva, Dana A., Berczik, Peter, Kharchenko, Nina V., Piskunov, Anatoly E., Polyachenko, Evgeny, Postnikova, Ekaterina, Just, Andreas, Borodina, Olga, Omarov, Chingis, Sobodar, Olexandr
In a previous paper using Gaia DR2 data, we demonstrated that the two closely situated open clusters Collinder 135 and UBC 7 might have formed together about 50 Myr ago. In this work, we performed star-by-star dynamical modelling of the evolution of
Externí odkaz:
http://arxiv.org/abs/2404.12255
Publikováno v:
Astronomy & Astrophysics, Volume 683, id.A146, (2024)
The present epoch of the Gaia success gives us a possibility to predict the dynamical evolution of our Solar System in the global Galactic framework with high precision. We statistically investigated the total interaction of globular clusters with th
Externí odkaz:
http://arxiv.org/abs/2401.03518
Autor:
Ishchenko, Maryna, Sobolenko, Margaryta, Berczik, Peter, Omarov, Chingis, Sobodar, Olexander, Kalambay, Mukhagali, Yurin, Denis
Publikováno v:
A&A 678, A69 (2023)
Aims. We carry out the self-consistent dynamic evolution of the orbital structure of Milky Way globular clusters. This allows us to estimate possible and probable close passages and even collisions of the clusters with each other. Methods. We reprodu
Externí odkaz:
http://arxiv.org/abs/2308.12699