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The study of compact objects such as white dwarfs, neutron stars and black holes requires the interplay between nuclear and atomic physics together with relativistic field theories, e.g., general relativity, quantum electrodynamics, quantum chromodynamics, as well as particle physics. In addition to the theoretical physics aspects, the study of astrophysical scenarios characterized by the presence of at least one of the above compact object is focus of extensive research within our group. The research of our group can be divided into the following topics:
• White Dwarf Physics and Structure. • White Dwarf Astrophysics. • Neutron Star Physics and Structure. • Neutron Star Astrophysics. • Radiation Mechanisms of White Dwarfs and Neutron Stars. • Exact and Numerical Solutions of the Einstein and Einstein-Maxwell Equations in Astrophysics. |
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Group leader: Prof. Jorge A. Rueda H.
Group members: At ICRANet: C. L. Bianco (ICRANet, Italy), J. A. Rueda (ICRANet, Italy), R. Ruffini (ICRANet, Italy), N. Sahakyan (ICRANet, Armenia), G. Vereschagin (ICRANet, Italy), S.-S. Xue (ICRANet, Italy) External collaborators: K. Boshkayev (Al-Farabi Kazakh National University, Kazakhstan), R. Camargo (Universidade do Estado de Santa Catarina, Florianópolis, Brazil), C. Cherubini (Università Campus Biomedico, Rome, Italy), J. G. Coelho (Universidade Tecnológica Federal do Paraná, Brazil), S. Filippi (Università Campus Biomedico, Rome, Italy), C. L. Fryer (University of Arizona; Los Alamos National Laboratory, USA), G. A. González (Universidad Industrial de Santander, Colombia), M. M. Guzzo (Universidade Estadual de Campinas, Brazil), F. D. Lora-Clavijo (Universidad Industrial de Santander, Colombia), P. Lorén Aguilar (University of Exeter, United Kingdom), S. O. Kepler (Universidade Federal do Rio Grande do Sul, Brazil), M. Malheiro (Instituto Tecnológico de Aeronáutica, Brazil), R. M. Jr. Marinho (Instituto Tecnológico de Aeronáutica, Brazil), G. Mathews (University of Notre Dame, USA), R. Negreiros (Universidade Federal de Fluminense, Brazil), L. A. Nuñez (Universidad Industrial de Santander, Colombia), R. Riahi (Department of Science, Shahrekord Branch, Islamic Azad University, Iran), C. V. Rodrigues (Instituto Nacional de Pesquisas Espaciais, Brazil), F. Rossi-Torres (Universidade Estadual de Campinas, Brazil), J. I. Zuluaga (Universidad de Antioquia, Colombia) Postdocs: L. Becerra (Universidad Pontificia Católica de Chile, Chile), G. A. Carvalho (Instituto Tecnológico de Aeronáutica, Brazil), C. L. Ellinger (Los Alamos National Laboratory, USA), R. V. Lobato (ICRANet; Sapienza University of Rome, Italy; Instituto Tecnológico de Aeronáutica, Brazil), R. Moradi (ICRANet, Italy), J. P. Pereira (Universidade Federal do ABC, Brazil; Mathematical Sciences and STAG Research Centre, University of Southampton, United Kingdom), J. F. Rodriguez (Universidad Industrial de Santander, Colombia), Y. Wang (ICRANet, Italy) Graduate Students: E. Becerra (ICRANet; Sapienza University of Rome, Italy), J. M. Blanco-Iglesias (Universitat Politècnica de Catalunya), S. Campion (ICRANet; Sapienza University of Rome, Italy), J. D. Uribe (ICRANet; Sapienza University of Rome, Italy) |
Brief description
• White Dwarf Physics and Structure.
Figure 1: Mass-radius relation of non-rotating and rotating white dwarfs. Taken from Becerra, et al. 2018, ApJ 857, 134.
The aim of this research is the construction of the white dwarf structure within a self-consistent description of the equation of state of the interior together with the solution of the hydrostatic equilibrium equations in general relativity. Non-magnetized, magnetized, non-rotating and rotating white dwarfs are studied. The interaction and evolution of a central white dwarf with a surrounding disk and magnetic fields, as occurred in the aftermath of white dwarf binary mergers, is also a subject of study.
• White Dwarf Astrophysics.
Figure 2: Time evolution of the central temperature of a rotating white dwarf while losing angular momentum by magnetic-dipole radiation. Taken from Becerra, et al. 2019, MNRAS 487, 812.
We are interested in the astrophysical scenarios in which white dwarfs are present, either isolated or in binaries. Magnetized white dwarfs, soft gamma repeaters, anomalous X-ray pulsars, white dwarf pulsars, cataclysmic variables, binary white dwarf mergers, and type Ia supernovae are studied. The role of a realistic description of the white dwarf structure is emphasized.
• Neutron Star Physics and Structure.
Figure 3: Mass-equatorial radius relation of rotating neutron stars at the mass-shedding rate, for several up-to-date nuclear equations of state. Taken from Riahi, Kalantari and Rueda, 2019, PRD 99, 043004.
We study the properties of the neutron stars interiors and structure using realistic models of the nuclear matter equation of state within the general relativistic equations of equilibrium. Strong, weak, electromagnetic and gravitational interactions have to be jointly taken into due account within a self-consistent fully relativistic framework. Non-magnetized, magnetized, non-rotating and rotating neutron stars are studied.
• Neutron Star Astrophysics.
Figure 4: Snapshots of the smoothed-particle-hydrodynamics (SPH) simulation of the induced gravitational collapse scenario for long gamma-ray bursts. Here we have a binary system formed by a carbon-oxygen star (COcore), which explodes as supernova in presence of a 2M⊙ companion neutron star. The accretion of supernova matter onto the NS induces the gravitational collapse of it into a black hole, with subsequent emission of a gamma-ray burst. The system has an initial orbital period of 5 min. The plots show the mass density on the binary equatorial plane, at different times of the simulation. Taken from Becerra, et al., 2019, ApJ 871, 14.
We study astrophysical scenarios harboring neutron stars such as isolated and binary pulsars, low and intermediate X-ray binaries, inspiraling and merging double neutron stars. Most extreme cataclysmic events involving neutron stars and their role in the explanation of extraordinarily energetic astrophysical events such as gamma-ray bursts are analyzed in detail.
• Radiation Mechanisms of White Dwarfs and Neutron Stars.
Figure 5: Snapshots of the time evolution of 0.8 + 0.6 M⊙ white-dwarf binary merger. The simulation uses the SPH technique with 7×105 particles. The newly-formed central white dwarf has approximately 1.1 M⊙. In the sequence it can be seen how the secondary star is disrupted by Roche lobe overflow. Little mass is ejected, in the present simulation nearly 1.2 × 10−3 M⊙. Taken from Rueda, et al., 2019, JCAP 3, 044.
We here study the possible radiation mechanisms of white dwarfs and neutron stars. We are thus interested in the electromagnetic, neutrino and gravitational wave emission at work in astrophysical systems such as compact star magnetosphere, accretion disks surrounding them and inspiraling and merging relativistic binaries such as double neutron stars, neutron star-white dwarfs, white dwarf-white dwarf and neutron star-black hole.
• Exact and Numerical Solutions of the Einstein and Einstein-Maxwell Equations in Astrophysics.
Figure 6: Electric and magnetic field lines of the solution of the Einstein-Maxwell equations by Wald 1974: an asymptotically uniform magnetic field, aligned with the rotation axis of a Kerr black hole. The blue lines show the magnetic field lines and the violet show the electric field lines. This electromagnetic field structure has been exploited in a new electrodynamical process to extract the rotational of a Kerr black hole that explains the high-energy GeV-TeV emission from gamma-ray bursts. Taken from Ruffini, et al., 2019, ApJ 886, 82.
We analyze the ability of analytic exact solutions of the Einstein and Einstein-Maxwell equations to describe the exterior spacetime of compact stars such as white dwarfs and neutron stars. For this we compare and contrast exact analytic with numerical solutions of the stationary axisymmetric Einstein equations. The problem of matching between interior and exterior spacetime is addressed in detail. The effect of the quadrupole moment on the properties of the spacetime is also investigated. Particular attention is given to the application of exact solutions in astrophysics, e.g. the dynamics of particles around compact stars and its relevance in astrophysical systems such as X-ray binaries and gamma-ray bursts.
Publications
[1] R. C. R. de Lima, J. G. Coelho, J. P. Pereira, C. V. Rodrigues and J. A. Rueda, Evidence for a Multipolar Magnetic Field in SGR J1745-2900 from X-Ray Light-curve Analysis, Astroph. J. 889 (2020) 165 [1912.12336].
[2] R. Ruffini, R. Moradi, J. A. Rueda, L. Becerra, C. L. Bianco, C. Cherubini et al., On the GeV Emission of the Type I BdHN GRB 130427A, Astroph. J. 886 (2019) 82 [1812.00354].
[3] L. Becerra, K. Boshkayev, J. A. Rueda and R. Ruffini, Time evolution of rotating and magnetized white dwarf stars, Mon. Not. R. Astron. Soc. 487 (2019) 812 [1812.10543].
[4] J. D. Uribe and J. A. Rueda, Some recent results on neutrino osillations in hypercritical accretion, Astronomische Nachrichten 340 (2019) 935.
[5] A. W. Romero Jorge, E. Rodriguez Querts, H. Perez Rojas, A. Perez Martı́nez, L. Cruz Rodrı́guez, G. Piccinelli Bocchi et al., The photon time delay in magnetized vacuum magnetosphere, Astronomische Nachrichten 340 (2019) 852 [1912.02904].
[6] J. A. Rueda and R. Ruffini, The blackholic quantum, European Journal pf Physics C; in press; arXiv:1907.08066 (2019) arXiv:1907.08066 [1907.08066].
[7] J. A. Rueda, R. Ruffini, M. Karlica, R. Moradi and Y. Wang, Magnetic Fields and Afterglows of BdHNe: Inferences from GRB 130427A, GRB 160509A, GRB 160625B, GRB 180728A and GRB 190114C, Astrophysical Journal; in press; arXiv:1905.11339 (2019) arXiv:1905.11339 [1905.11339].
[8] R. Moradi, J. A. Rueda, R. Ruffini and Y. Wang, The newborn black hole in GRB 191014C manifests that is alive, submitted to Astronomy and Astrophysics; arXiv:1911.07552 (2019) arXiv:1911.07552 [1911.07552].
[9] J. A. Rueda, R. Ruffini and Y. Wang, Induced Gravitational Collapse, Binary-Driven Hypernovae, Long Gramma-ray Bursts and Their Connection with Short Gamma-ray Bursts, Universe 5 (2019) 110 [1905.06050].
[10] R. Ruffini, L. Li, R. Moradi, J. A. Rueda, Y. Wang, S. S. Xue et al., Self-similarity and power-laws in GRB 190114C, arXiv e-prints (2019) arXiv:1904.04162 [1904.04162].
[11] J. A. Rueda, R. Ruffini, Y. Wang, C. L. Bianco, J. M. Blanco-Iglesias, M. Karlica et al., Electromagnetic emission of white dwarf binary mergers, Journal of Cosmology and Astro-Particle Physics 2019 (2019) 044 [1807.07905].
[12] Y. Wang, J. A. Rueda, R. Ruffini, L. Becerra, C. Bianco, L. Becerra et al., Two Predictions of Supernova: GRB 130427A/SN 2013cq and GRB 180728A/SN 2018fip, Astroph. J. 874 (2019) 39 [1811.05433].
[13] R. Riahi, S. Z. Kalantari and J. A. Rueda, Universal relations for the Keplerian sequence of rotating neutron stars, Phys. Rev. D 99 (2019) 043004 [1902.00349].
[14] R. Ruffini, R. Moradi, Y. Aimuratov, U. Barres, V. A. Belinski, C. L. Bianco et al., GRB 190114C: A type 1 BdHN with TeV emission., GRB Coordinates Network 23715 (2019) 1.
[15] L. Becerra, C. L. Ellinger, C. L. Fryer, J. A. Rueda and R. Ruffini, SPH Simulations of the Induced Gravitational Collapse Scenario of Long Gamma-Ray Bursts Associated with Supernovae, Astroph. J. 871 (2019) 14 [1803.04356].
[16] J. F. Rodriguez, J. A. Rueda and R. Ruffini, On the Final Gravitational Wave Burst from Binary Black Holes Mergers, Astronomy Reports 62 (2018) 940.
[17] D. Primorac, M. Muccino, R. Moradi, Y. Wang, J. D. Melon Fuksman, R. Ruffini et al., Structure of the Prompt Emission of GRB 151027A Within the Fireshell Model, Astronomy Reports 62 (2018) 933.
[18] R. Moradi, R. Ruffini, C. L. Bianco, Y. C. Chen, M. Karlica, J. D. Melon Fuksman et al., Relativistic Behavior and Equitemporal Surfaces in Ultra-Relativistic Prompt Emission Phase of Gamma-Ray Bursts, Astronomy Reports 62 (2018) 905.
[19] L. Becerra, C. Ellinger, C. Fryer, J. A. Rueda and R. Ruffini, On the Induced Gravitational Collapse: SPH Simulations, Astronomy Reports 62 (2018) 840.
[20] R. Ruffini, L. Becerra, C. L. Bianco, Y. C. Chen, M. Karlica, M. Kovačević et al., On the Ultra-relativistic Prompt Emission, the Hard and Soft X-Ray Flares, and the Extended Thermal Emission in GRB 151027A, Astroph. J. 869 (2018) 151 [1712.05001].
[21] R. Ruffini, M. Karlica, N. Sahakyan, J. A. Rueda, Y. Wang, G. J. Mathews et al., A GRB Afterglow Model Consistent with Hypernova Observations, Astroph. J. 869 (2018) 101 [1712.05000].
[22] J. A. Rueda, R. Ruffini, Y. Wang, Y. Aimuratov, U. Barres de Almeida, C. L. Bianco et al., GRB 170817A-GW170817-AT 2017gfo and the observations of NS-NS, NS-WD and WD-WD mergers, Journal of Cosmology and Astro-Particle Physics 2018 (2018) 006 [1802.10027].
[23] R. Ruffini, Y. Wang, Y. Aimuratov, U. B. de Almeida, L. Becerra, C. L. Bianco et al., VizieR Online Data Catalog: Early X-ray flares in GRBs (Ruffini+, 2018), VizieR Online Data Catalog (2018) J/ApJ/852/53.
[24] J. A. Rueda, R. Ruffini, Y. Wang, U. Barres de Almeida, C. L. Bianco, Y. C. Chen et al., GRB 170817A-GW170817-AT 2017gfo and the observations of NS-NS, NS-WD and WD-WD mergers, in Talk presented at The Fifteenth Marcel Grossmann Meeting - MG15, p. E15, Aug, 2018.
[25] R. Ruffini, J. Rodriguez, M. Muccino, J. A. Rueda, Y. Aimuratov, U. Barres de Almeida et al., On the Rate and on the Gravitational Wave Emission of Short and Long GRBs, Astroph. J. 859 (2018) 30.
[26] L. Becerra, J. A. Rueda, P. Lorén-Aguilar and E. Garcı́a-Berro, The Spin Evolution of Fast-rotating, Magnetized Super-Chandrasekhar White Dwarfs in the Aftermath of White Dwarf Mergers, Astroph. J. 857 (2018) 134 [1804.01275].
[27] R. Ruffini, R. Moradi, J. A. Rueda, Y. Wang, Y. Aimuratov, L. Becerra et al., On the role of the Kerr-Newman black hole in the GeV emission of long gamma-ray bursts, arXiv e-prints (2018) arXiv:1803.05476 [1803.05476].
[28] J. F. Rodrı́guez, J. A. Rueda and R. Ruffini, Comparison and contrast of test-particle and numerical-relativity waveform templates, Journal of Cosmology and Astro-Particle Physics 2018 (2018) 030 [1706.07704].
[29] R. Ruffini, M. Muccino, Y. Aimuratov, M. Amiri, C. L. Bianco, Y. C. Chen et al., On the Short GRB GeV emission from a Kerr Black hole, arXiv e-prints (2018) arXiv:1802.07552 [1802.07552].
[30] K. A. Boshkayev, M. Muccino, J. A. Rueda and G. D. Zhumakhanova, Fundamental Frequencies in the Schwarzschild Spacetime, arXiv e-prints (2018) arXiv:1802.06773 [1802.06773].
[31] K. Boshkayev, J. A. Rueda, R. Ruffini and B. Zhami, Induced compression of white dwarfs by angular momentum loss, in Fifteenth Marcel Grossmann Meeting - MG15, pp. 4379–4384, Jan, 2018, DOI.
[32] D. L. Caceres and J. A. Rueda, On the spin-down and X-ray luminosity of anomalous X-ray pulsars and soft gamma repeaters as white dwarfs, in Fifteenth Marcel Grossmann Meeting - MG15, pp. 4344–4349, Jan, 2018, DOI.
[33] R. C. R. de Lima, J. G. Coelho, D. L. CáCeres, J. A. Rueda and R. Ruffini, Application of modern neutron star equations of state in the study of SGRs and AXPs properties, in Fifteenth Marcel Grossmann Meeting - MG15, pp. 4337–4343, Jan, 2018, DOI.
[34] L. M. Becerra, J. A. Rueda, P. LoréN-Aguilar and E. Garcı́A-Berro, Induced compression by angular momentum losses in fast-rotating, magnetized super-Chandraskehar white dwarfs, in Fifteenth Marcel Grossmann Meeting - MG15, pp. 4291–4296, Jan, 2018, DOI.
[35] K. Boshkayev, J. A. Rueda, R. Ruffini, B. Zhami, Z. Kalymova and G. Balgimbekov, Mass-radius relations of white dwarfs at finite temperatures, in Fifteenth Marcel Grossmann Meeting - MG15, pp. 4287–4290, Jan, 2018, DOI.
[36] K. Boshkayev, J. A. Rueda and M. Muccino, Main parameters of neutron stars from quasi-periodic oscillations in low mass X-ray binaries, in Fifteenth Marcel Grossmann Meeting - MG15, pp. 3433–3440, Jan, 2018, DOI.
[37] Y. Aimuratov, R. Ruffini, C. L. Bianco, M. Enderli, L. Izzo, M. Kovacevic et al., Analysis of the GRB 081024B, in Fifteenth Marcel Grossmann Meeting - MG15, pp. 2975–2980, Jan, 2018, DOI.
[38] M. Muccino, R. Ruffini, M. Kovacevic, F. G. Oliveira, J. A. Rueda, Y. Aimuratov et al., GRB 140619B: A short GRB from a binary neutron star merger leading to black hole formation, in Fifteenth Marcel Grossmann Meeting - MG15, pp. 2969–2974, Jan, 2018, DOI.
[39] G. J. Mathews, C. Biaco, M. Muccio, G. Pisani, J. Rueda, R. Ruffini et al., Constraints on the source for gamma-ray bursts from observed X-ray afterglows, in Fifteenth Marcel Grossmann Meeting - MG15, pp. 2957–2962, Jan, 2018, DOI.
[40] L. M. Becerra, F. Cipolletta, J. A. Rueda, R. Ruffini and C. L. Fryer, Angular momentum role in the hypercritical accretion of binary-driven hypernovae, in Fifteenth Marcel Grossmann Meeting - MG15, pp. 2953–2956, Jan, 2018, DOI.
[41] A. Krut, C. R. Argüelles, G. Gomez, J. A. Rueda and R. Ruffini, Dark matter phase-space density distribution in dwarf spheroidal galaxies, in Fifteenth Marcel Grossmann Meeting - MG15, pp. 2503–2508, Jan, 2018, DOI.
[42] J. A. Rueda, Y. Aimuratov, U. B. de Almeida, L. Becerra, C. L. Bianco, C. Cherubini et al., The binary systems associated with short and long gamma-ray bursts and their detectability, in Fifteenth Marcel Grossmann Meeting - MG15, pp. 306–324, Jan, 2018, DOI.
[43] R. Ruffini, Y. Aimuratov, L. Becerra, C. L. Bianco, M. Karlica, M. Kovacevic et al., The cosmic matrix in the 50th anniversary of relativistic astrophysics, in Fifteenth Marcel Grossmann Meeting - MG15, pp. 258–305, Jan, 2018, DOI.
[44] R. Ruffini, Y. Aimuratov, C. L. Bianco, Y. C. Chen, D. M. Fuksman, M. Karlica et al., GRB 180728A: A long GRB of the X-ray flash (XRF) subclass, expecti=., GRB Coordinates Network 23066 (2018) 1.
[45] R. Ruffini, Y. Aimuratov, C. L. Bianco, Y. C. Chen, D. M. Fuksman, M. Karlica et al., GRB 180720B: Testing the universality of the newly born neutron st=., GRB Coordinates Network 23019 (2018) 1.
[46] J. D. Melon Fuksman, L. Becerra, C. L. Bianco, M. Karlica, M. Kovacevic, R. Moradi et al., Evolution of an electron-positron plasma produced by induced gravitational collapse in binary-driven hypernovae, in European Physical Journal Web of Conferences, vol. 168, p. 04009, Jan, 2018, DOI.
[47] D. Primorac, R. Ruffini, G. B. Pisani, Y. Aimuratov, C. L. Biancol, M. Karlica et al., GRB 110731A within the IGC paradigm, in European Physical Journal Web of Conferences, vol. 168, p. 04008, Jan, 2018, DOI.
[48] G. B. Pisani, R. Ruffini, Y. Aimuratov, C. L. Bianco, M. Karlica, M. Kovacevic et al., The first ICRANet catalog of binary-driven hypernovae, in European Physical Journal Web of Conferences, vol. 168, p. 04002, Jan, 2018, DOI.
[49] J. F. Rodrı́guez, J. A. Rueda and R. Ruffini, Strong-field gravitational-wave emission in Schwarzschild and Kerr geometries: some general considerations, in European Physical Journal Web of Conferences, vol. 168 of European Physical Journal Web of Conferences, p. 02006, Jan, 2018, 1706.06440, DOI.
[50] L. M. Becerra, C. Bianco, C. Fryer, J. Rueda and R. Ruffini, On the Induced Gravitational Collapse, in European Physical Journal Web of Conferences, vol. 168, p. 02005, Jan, 2018, DOI.
[51] M. Muccino, R. Ruffini, Y. Aimuratov, L. M. Becerra, C. L. Bianco, M. Karlica et al., What can we learn from GRBs?, in European Physical Journal Web of Conferences, vol. 168, p. 01015, Jan, 2018, DOI.
[52] J. A. Rueda, R. Ruffini, J. F. Rodriguez, M. Muccino, Y. Aimuratov, U. Barres de Almeida et al., The binary progenitors of short and long GRBs and their gravitational-wave emission, in European Physical Journal Web of Conferences, vol. 168, p. 01006, Jan, 2018, DOI.
[53] L. Becerra, M. M. Guzzo, F. Rossi-Torres, J. A. Rueda, R. Ruffini and J. D. Uribe, Neutrino Oscillations within the Induced Gravitational Collapse Paradigm of Long Gamma-Ray Bursts, Astroph. J. 852 (2018) 120 [1712.07210].
[54] R. Ruffini, Y. Wang, Y. Aimuratov, U. Barres de Almeida, L. Becerra, C. L. Bianco et al., Early X-Ray Flares in GRBs, Astroph. J. 852 (2018) 53 [1704.03821].
[55] L. G. Gómez and J. A. Rueda, Dark matter dynamical friction versus gravitational wave emission in the evolution of compact-star binaries, Phys. Rev. D 96 (2017) 063001 [1706.06801].
[56] L. M. Becerra, C. L. Fryer, J. A. Rueda and R. Ruffini, Hypercritical Accretion in the Induced Gravitational Collapse, in Revista Mexicana de Astronomia y Astrofisica Conference Series, vol. 49, pp. 83–83, Jul, 2017.
[57] F. Cipolletta, C. Cherubini, S. Filippi, J. A. Rueda and R. Ruffini, Last stable orbit around rapidly rotating neutron stars, Phys. Rev. D 96 (2017) 024046 [1612.02207].
[58] Y. Aimuratov, R. Ruffini, M. Muccino, C. L. Bianco, A. V. Penacchioni, G. B. Pisani et al., GRB 081024B and GRB 140402A: Two Additional Short GRBs from Binary Neutron Star Mergers, Astroph. J. 844 (2017) 83 [1704.08179].
[59] D. L. Cáceres, S. M. de Carvalho, J. G. Coelho, R. C. R. de Lima and J. A. Rueda, Thermal X-ray emission from massive, fast rotating, highly magnetized white dwarfs, Mon. Not. R. Astron. Soc. 465 (2017) 4434 [1611.07653].
[60] J. G. Coelho, D. L. Cáceres, R. C. R. de Lima, M. Malheiro, J. A. Rueda and R. Ruffini, The rotation-powered nature of some soft gamma-ray repeaters and anomalous X-ray pulsars, Astron. Astroph. 599 (2017) A87.
[61] R. C. R. de Lima, J. G. Coelho, M. Malheiro, J. A. Rueda and R. Ruffini, SGRs/AXPs as Rotation-Powered Neutron Stars, in International Journal of Modern Physics Conference Series, vol. 45, p. 1760030, Jan, 2017, DOI.
[62] R. Ruffini, Y. Aimuratov, L. Becerra, C. L. Bianco, M. Karlica, M. Kovacevic et al., The cosmic matrix in the 50th anniversary of relativistic astrophysics, International Journal of Modern Physics D 26 (2017) 1730019.
[63] J. A. Rueda, Y. Aimuratov, U. B. de Almeida, L. Becerra, C. L. Bianco, C. Cherubini et al., The binary systems associated with short and long gamma-ray bursts and their detectability, International Journal of Modern Physics D 26 (2017) 1730016.
[64] J. A. Rueda, Y.-B. Wu and S.-S. Xue, Surface tension of compressed, superheavy atoms, arXiv e-prints (2017) arXiv:1701.08146 [1701.08146].
[65] J. G. Coelho, D. L. Cáceres, R. C. R. de Lima, M. Malheiro, J. A. Rueda and R. Ruffini, On the nature of some SGRs and AXPs as rotation-powered neutron stars, arXiv e-prints (2016) arXiv:1612.01875 [1612.01875].
[66] G. B. Pisani, R. Ruffini, Y. Aimuratov, C. L. Bianco, M. Kovacevic, R. Moradi et al., On the Universal Late X-Ray Emission of Binary-driven Hypernovae and Its Possible Collimation, Astroph. J. 833 (2016) 159 [1610.05619].
[67] L. Becerra, C. L. Bianco, C. L. Fryer, J. A. Rueda and R. Ruffini, On the Induced Gravitational Collapse Scenario of Gamma-ray Bursts Associated with Supernovae, Astroph. J. 833 (2016) 107 [1606.02523].
[68] R. Ruffini, J. A. Rueda, M. Muccino, Y. Aimuratov, L. M. Becerra, C. L. Bianco et al., On the Classification of GRBs and Their Occurrence Rates, Astroph. J. 832 (2016) 136 [1602.02732].
[69] R. Ruffini, M. Muccino, Y. Aimuratov, C. L. Bianco, C. Cherubini, M. Enderli et al., GRB 090510: A Genuine Short GRB from a Binary Neutron Star Coalescing into a Kerr-Newman Black Hole, Astroph. J. 831 (2016) 178 [1607.02400].
[70] K. Boshkayev, J. A. Rueda and M. Muccino, Theoretical and observational constraints on the mass-radius relations of neutron stars, arXiv e-prints (2016) arXiv:1606.07804 [1606.07804].
[71] J. F. Rodriguez, J. A. Rueda and R. Ruffini, What can we really infer from GW 150914? (II), arXiv e-prints (2016) arXiv:1605.07609 [1605.07609].
[72] J. F. Rodriguez, J. A. Rueda and R. Ruffini, What can we really infer from GW 150914?, arXiv e-prints (2016) arXiv:1605.04767 [1605.04767].
[73] K. Boshkayev, J. A. Rueda and M. Muccino, Main parameters of neutron stars from quasi-periodic oscillations in low mass X-ray binaries, arXiv e-prints (2016) arXiv:1604.02398 [1604.02398].
[74] K. Boshkayev, J. A. Rueda, R. Ruffini and B. Zhami, Induced Compression of White Dwarfs by Angular Momentum Loss, arXiv e-prints (2016) arXiv:1604.02393 [1604.02393].
[75] K. Boshkayev, J. A. Rueda, R. Ruffini, B. Zhami, Z. Kalymova and G. Balgimbekov, Mass-radius relations of white dwarfs at finite temperatures, arXiv e-prints (2016) arXiv:1604.02391 [1604.02391].
[76] K. A. Boshkayev, J. A. Rueda, B. A. Zhami, Z. A. Kalymova and G. S. Balgymbekov, Equilibrium structure of white dwarfs at finite temperatures, in International Journal of Modern Physics Conference Series, vol. 41 of International Journal of Modern Physics Conference Series, p. 1660129, Mar, 2016, 1510.02024, DOI.
[77] R. Ruffini, J. Rodriguez, M. Muccino, J. A. Rueda, Y. Aimuratov, U. Barres de Almeida et al., On the rate and on the gravitational wave emission of short and long GRBs, arXiv e-prints (2016) arXiv:1602.03545 [1602.03545].
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