My research interests focus on study the neutron star properties, the strongly interacting matter phase diagram, the deconfinement and liquid-gas phase transitions. Particularly I work on a development of a unified equation of state able to describe strongly interacting matter in all ranges of temperature and baryon density, i.e. heavy-ion collisions and neutron stars.
Research Highlights
- The induced surface tension contribution for the equation of state of
neutron stars
Violetta Sagun, I. Lopes, A. I. Ivanytskyi
Astrophys. J. 871, 157 (2019) - Neutron stars meet constraints from high and low energy nuclear physics
Violetta Sagun, I. Lopes, A. Ivanytskyi
Nuclear Physics A, Proceedings of the ‘XXVIIth International Conference on Ultrarelativistic Nucleus-Nucleus Collisions (Quark Matter 2018)’ 982, 883-886 (2019)
Publications [LaTeX]
Papers
International Journals
1 - Asteroseismology: radial oscillations of neutron stars with realistic equation of state
Violetta Sagun, I. Lopes G. Panotopoulos
Phys. Rev. D 101, 063025 (2020)
2 - Second look to the Polyakov Loop Nambu-Jona-Lasinio model at finite baryonic density
O. Ivanytskyi, M. Ángeles Pérez-Garcı́a, Violetta Sagun, C. Albertus
Phys. Rev. D 100, 103020 (2019)
3 - The induced surface tension contribution for the equation of state of
neutron stars
Violetta Sagun, I. Lopes, A. I. Ivanytskyi
Astrophys. J. 871, 157 (2019)
4 - On relation between bulk, surface and curvature parts of nuclear
binding energy within the model of hexagonal clusters
Violetta Sagun, K. A. Bugaev, A. I. Ivanytskyi
Phys. Part. Nucl. Lett. 16, No. 6, 671-680 (2019)
Proceedings
International Conferences
5 - Hard-core Radius of Nucleons within the Induced Surface Tension Approach
K. A. Bugaev, A. I. Ivanytskyi, Violetta Sagun, B. E. Grinyuk, D. O. Savchenko, G. M. Zinovjev, E. G. Nikonov, L. V. Bravina, E. E. Zabrodin, D. B. Blaschke, A. V. Taranenko, L. Turko
Universe, Proceedings of the 7th International Conference on New Frontiers in Physics (ICNFP 2018)) 5(2), 63 (2019)
6 - Possible signals of two QCD phase transitions at NICA-FAIR energies
K. A. Bugaev, A. I. Ivanytskyi, Violetta Sagun, B. E. Grinyuk, D. O. Savchenko, G. M. Zinovjev, E. G. Nikonov, L. V. Bravina, E. E. Zabrodin, D. B. Blaschke, A. V. Taranenko S. Kabana
EPJ Web Conf. 204, 03001 (2019)
7 - On separate chemical freeze-outs of hadrons and light(anti)nuclei in high energy nuclear collisions
K. A. Bugaev, B. E. Grinyuk, A. I. Ivanytskyi, Violetta Sagun, D. O. Savchenko, G. M. Zinovjev, E. G. Nikonov, L. V. Bravina, E. E. Zabrodin, D. B. Blaschke, S. Kabana, A. V. Taranenko
J. Phys.: Conf. Ser., Proceedings of the 4th International Conference on Particle Physics and Astrophysics (ICPPA-2018) 1390, 012038 (2019)
8 - Neutron stars meet constraints from high and low energy nuclear physics
Violetta Sagun, I. Lopes, A. Ivanytskyi
Nuclear Physics A, Proceedings of the ‘XXVIIth International Conference on Ultrarelativistic Nucleus-Nucleus Collisions (Quark Matter 2018)’ 982, 883-886 (2019)
Communications
Invited
9 - Series of lectures on “Compact stars, equation of state of neutron stars and the NS-NS merger events”
Violetta Sagun
Oslo Winter School “Standard Model, Quantum Chromodynamics, Heavy Ion Collisions”, Skeikampen, Norway, 2 - 12 January (2020)
10 - Thermal production of Sexaquarks in Heavy Ion Collisions
D. Blaschke, L. Bravina, K. Bugaev, G. Farrar, B. Grinyuk, O. Ivanytskyi, S. Kabana, Violetta Sagun, A. Taranenko, E. Zabrodin, X. Zhang and D. Zhou
at the 8-th International Conference on New Frontiers in Physics (ICNFP2019), Kolymbari, Crete, Greece, August 21-29 (2019)
11 - Updated signals of two QCD phase transitions in heavy ion collisions
K. A. Bugaev, Violetta Sagun, B. E. Grinyuk, A. S. Zhokhin, A. I. Ivanytskyi, D. A. Savchenko, G. M. Zinovjev, E. G. Nikonov, L. V. Bravina, E. E. Zabrodin, S. Kabana, D. B. Blaschke and A. V. Taranenko
at the 8-th International Conference on New Frontiers in Physics (ICNFP2019), Kolymbari, Crete, Greece, August 21-29 (2019)
12 - Classical excluded volume of loosely bound light (anti)nuclei and their chemical freeze-out in HIC
K. A. Bugaev, B. E. Grinyuk, A. I. Ivanytskyi, Violetta Sagun, A. S. Zhokhin, D. A. Savchenko, G. M. Zinovjev, E. G. Nikonov, L. V. Bravina, E. E. Zabrodin, S. Kabana, D. B. Blaschke and A. V. Taranenko
at the 8-th International Conference on New Frontiers in Physics (ICNFP2019), Kolymbari, Crete, Greece, August 21-29 (2019)
13 - Neutron stars: laboratories for fundamental physics under extreme conditions
Violetta Sagun
Institute of Theoretical Astrophysics, University of Oslo, Norway, 18 January (2019)
14 - Dark-matter admixed compact stars and their properties under extreme conditions
Violetta Sagun
Department of Physics, University of Tokyo, Japan, 30 September (2019)
15 - Dark-matter admixed compact stars and their properties under extreme conditions
Violetta Sagun
Department of Physics, University of Tokyo, Japan, 30 September (2019)
16 - Unified equation of state consistent with astrophysical, gravitational, high- and low- energy nuclear physics data and its applications
Violetta Sagun
N. Copernicus Astronomical Center, Polish Academy of Sciences, Warsaw, Poland, 11 December (2019)
17 - Neutron stars meet constraints from astrophysics, gravitation, high and low energy nuclear physics
Violetta Sagun
Institute of Theoretical Astrophysics, University of Oslo, Norway, 17 January, (2019)
18 - Neutron stars meet constraints from astrophysics, gravitation, high and low energy nuclear physics
Violetta Sagun
“Precision Gravity: From the LHC to LISA”, Munich Institute for
Astro- and Particle Physics (MIAPP), Garching, Germany, 26 August - 6 September (2019)
Oral
19 - Understanding the Neutron Star Physics with the SKA
Violetta Sagun
workshop “Multi-messenger astronomy with SKA precursors and
pathfinders, a capacity building workshop”, Aveiro, Portugal, 12-15 May (2019)
20 - Dark-matter admixed compact stars and their properties under extreme conditions
Violetta Sagun, A. I. Ivanytskyi, I. Lopes
Young Scientists Conference “Problems of Theoretical Physics”, Kyiv,
Ukraine, 23 - 24 December (2019)
21 - Unified equation of state consistent with astrophysical, gravitational, high- and low- energy nuclear physics data
Violetta Sagun, I. Lopes, A. I. Ivanytskyi
workshop “Neutron stars and their environments” (MODE-SNR-PWN), Orléans, France, 8-10 April (2019)
22 - Equation of state of neutron stars consistent with astrophysical,low- and high-energy nuclear physics data and its applications
Violetta Sagun, I. Lopes, A. I. Ivanytskyi, G. Panotopoulos
PHAROS Conference 2019: the multi-messenger physics and astrophysics of neutron stars, Platja d’ Aro, Spain, 22-26
April (2019)
23 - Astrophysical constraints on the dark matter core inside the neutron stars
Violetta Sagun, O. Ivanytskyi, I. Lopes
XIX National Meeting of Astronomy and Astrophysics (ENAA), Instituto Superior Tecnico, Lisbon, Portugal, 12 - 13 September (2019)
24 - Unified equation of state consistent with astrophysical, gravitational, high- and low- energy nuclear physics data
Violetta Sagun, O. Ivanytskyi, I. Lopes
International workshop “Multi-Messenger Astrophysics in the Gravitational Wave Era”, Yukawa Institute for Theoretical Physics, Kyoto University, Japan, 24 September - 11 October (2019)
Poster
25 - Thermal production of Sexaquarks in heavy ion collisions
D. Blaschke, L. Bravina, K. Bugaev, G. Farrar, B. Grinyuk, O. Ivanytskyi, S. Kabana, Violetta Sagun, A. Taranenko, E. Zabrodin, X. Zhang, D. Zhou
Quark Matter 2019 (2019)
