Astrophysics and Cosmology
This group gathers researchers working on astrophysics and cosmology topics. It covers theoretical, computational and observational skills, potentiating synergies between them to tackle a number of problems of current interest in the field. The main research areas are the physics of white dwarfs, neutron stars and black holes, the equation of state of dense hadronic matter, radio astronomy, detection and characterisation of exoplanets, dynamics of stellar and planetary systems, celestial mechanics, computational astrophysics, interplay between particle and gravitational physics, the origin of dark matter, dark energy, inflation, and the baryon asymmetry.
Current projects
Previous projects
Recent Publications
Books
1 - Tidal excitation of the obliquity of Earth-like planets in the habitable zone of M-dwarf stars
EFS Valente, ACM Correia
Astron. Astrophys. 655, A130 (2022)
Papers
International Journals
2 - Dark matter admixed neutron star properties in light of gravitational wave observations: A two-fluid approach
Arpan Das, Tuhin Malik, and Alekha C. Nayak
Phys. Rev. D 105, 123034 (2022)
3 - Heavy baryons in hot stellar matter with light nuclei and hypernuclei
T Custodio, H Pais, C Providencia
Phys. Rev. C 105(6), 065803 (2022)
4 - Bosonic dark matter in neutron stars and its effect on gravitational wave signal
D. R. Karkevandi, S. Shakeri, Violetta Sagun, O. Ivanytskyi
Phys. Rev. D 105, 023001 (2022)
5 - The effect of self-interacting bosonic dark matter on neutron star properties
E. Giangrandi, Violetta Sagun, O. Ivanytskyi, C. Providência, T. Dietrich
submitted to the APJ (2022)
6 - Landau parameters and entrainment matrix of cold stellar matter: effect of the symmetry energy and strong magnetic fields
Helena Pais, Oleksii Ivanytskyi, Constança Providência
J. Cosmol. Astropart. Phys. 04, 024, 024 (2022)
7 - Spontaneous breaking of the Peccei-Quinn symmetry during warm inflation
JG Rosa, Luís B. Ventura
submitted not yet accepted [arXiv: 2105.05771] (2022)
8 - Identification of binary neutron star mergers in gravitational-wave data using object-detection machine learning models
João Aveiro, Felipe F. Freitas, Márcio Ferreira, Antonio Onofre, Constança Providência, Gonçalo Gonçalves, José A. Font
Phys. Rev. D 106, 084059 (2022)
9 - Delta baryons in neutron stars
Kauan D. Marquez, Débora P. Menezes, Helena Pais, Constança Providência
Phys. Rev. C 106, 055801 (2022)
10 - Polytropic fits of modern and unified equations of state
Lami Suleiman, Morgane Fortin, Julian Leszek Zdunik, Constanca Providencia
Phys. Rev. C 106, 035805 (2022)
11 - Numerical simulations of dark matter admixed neutron star binaries
M. Emma, F. Schianchi, Francesco, F. Pannarale, Violetta Sagun, T. Dietrich
Particles 5, 273 (2022)
12 - Evaporation of a Kerr-black-bounce by emission of scalar particles
Marco Calzà
Submitted not yet accepted (2022)
13 - Local solutions of General Relativity in the presence of the Trace Anomaly
Marco Calzà, Alessandro Casalino, Lorenzo Sebastiani
Phys. Dark Univ. 37, 101066 (2022)
14 - Evaporating primordial black holes, the string axiverse, and hot dark radiation
Marco Calzà, John March-Russell, João G. Rosa
Submitted not yet accepted (2022)
15 - The neutron star outer crust equation of state: a machine learning approach
Murarka Utsav Anil, Kinjal Banerjee, Tuhin Malik, Constança Providência
J. Cosmol. Astropart. Phys. 01, 045 (2022)
16 - Nearly model-independent constraints on dense matter equation of state in a Bayesian approach
N.K. Patra, Sk Md Adil Imam, B.K. Agrawal, Arunava Mukherjee, Tuhin Malik
Phys.Rev.D 106, 043024 (2022)
17 - Colliding and Fixed Target mode in a single experiment - a novel approach to study the matter under new extreme conditions
O. V. Vitiuk, V. M. Pugatch, K. A. Bugaev, N. S. Yakovenko, P. P. Panasiuk, E. S. Zherebtsova, V. M. Dobishuk, S. B. Chernyshenko, B. E. Grinyuk, Violetta Sagun, O. Ivanytskyi
Particles 5, 245 (2022)
18 - Superradiant pion clouds around primordial black holes
Paulo B. Ferraz, Thomas W. Kephart, JG Rosa
submitted not yet accepted [arXiv:2004.11303] (2022)
19 - Bayesian reconstruction of nuclear matter parameters from the equation of state of neutron star matter
Sk Md Adil Imam, N. K. Patra, C. Mondal, Tuhin Malik, and B. K. Agrawal
Phys. Rev. C 105, 015806 (2022)
20 - Heavy baryons in hot stellar matter with light nuclei and hypernuclei
Tiago Custódio, Helena Pais, Constança Providência
Phys. Rev. C 105, 065803 (2022)
21 - Bayesian inference of signatures of hyperons inside neutron stars
Tuhin Malik and Constança Providência
Phys. Rev. D 106, 063024 (2022)
22 - Inferring the nuclear symmetry energy at suprasaturation density from neutrino cooling
Tuhin Malik, B. K. Agrawal, and Constança Providência
Phys. Rev. C (Letter) 106, L042801 (2022)
23 - Inner crust equations of state for CompOSE
Tuhin Malik, Helena Pais
Eur. Phys. J. A 58, 154 (2022)
24 - Relativistic Description of Dense Matter Equation of State and Compatibility with Neutron Star Observables: A Bayesian Approach
Tuhin Malik, Márcio Ferreira, B.K. Agrawal, Constança Providência
Astrophys. J. (ApJ) 930, 17 (2022)
25 - Quick Guides for Use of the CompOSE Data Base
Veronica Dexheimer, Marco Mancini, Micaela Oertel, Constança Providência, Laura Tolos, Stefan Typel
Particles 5, 346-360 (2022)
26 - Pasta phases in neutron stars under strong magnetic fields
Xiaopeng Wang, Jing Li, Jianjun Fang, Helena Pais, Constança Providência
Phys. Rev. D 105, 063004 (2022)
Proceedings
International Conferences
27 - Evaporating primordial black holes, the string axiverse, and hot dark radiation
Marco Calzà
27th PASCOS conference, Max Planck institute (Heidelberg) (2022)
28 - Evaporating primordial black holes, the string axiverse, and hot dark radiation
Marco Calzà
IberiCOS2022, University of Barcelona (2022)
Communications
Invited
29 - Thermal evolution of compact stars
Violetta Sagun
Invited seminar at the Institute for Theoretical Physics, University of Wroclaw, Wroclaw, Poland, 29 April (2022)
30 - Impact of dark matter on compact stars
Violetta Sagun
Invited Theoretical Physics Colloquium hosted by Prof. Igor Shovkovy at the Arizona State University, 29 June (2022)
31 - The impact of dark matter on compact stars and their merger dynamics
Violetta Sagun
Invited seminar at the CENTRA, Instituto Superior Técnico, University of Lisbon, Portugal, 21 July (2022)
32 - Impact of dark matter on compact stars and their merger dynamics
Violetta Sagun, Tim Dietrich, Mattia Emma, Edoardo Giangrandi, Oleksii Ivanytskyi, Ilidio Lopes, Francesco Pannarale, Constança Providência, Federico Schianchi
Invited seminar at the Laboratoire de Physique des 2 infinis Irène Joliot-Curie – IJCLab, Université Paris-Saclay, France, 5 November (2022)
33 - Constraints on dark matter from observations of neutron stars and their mergers
Violetta Sagun, Tim Dietrich, Mattia Emma, Edoardo Giangrandi, Oleksii Ivanytskyi, Ilidio Lopes, Francesco Pannarale, Constança Providência, Federico Schianchi
Invited seminar at the Gr@v group, University of Aveiro, Portugal, 19 October (2022)
34 - Probing dark matter with neutron stars
Violetta Sagun, Tim Dietrich, Mattia Emma, Edoardo Giangrandi, Oleksii Ivanytskyi, Ilidio Lopes, Francesco Pannarale, Constança Providência, Federico Schianchi
at the IPA2022: Interplay between Particle and Astroparticle physics 2022, Vienna University of Technology, Vienna, Austria, 5 - 9 September (2022)
Oral
35 - Impact of asymmetric fermionic and bosonic dark matter on neutron star properties
Violetta Sagun, Oleksii Ivanytskyi, Edoardo Giangrandi
at the Institute for Nuclear Theory workshop (INT-20R-1B) “The r-process and the nuclear EOS after LIGO-Virgo’s third observing run”, Institute for Nuclear Theory, Seattle, USA, 23 - 27 May (2022)
36 - Effect of dark matter on observable neutron star’s properties and its discrimination from the strongly interacting matter equation of state
Violetta Sagun, Tim Dietrich, Mattia Emma, Edoardo Giangrandi, Oleksii Ivanytskyi, Ilidio Lopes, Francesco Pannarale, Constança Providência, Federico Schianchi
at the 18th International Conference on QCD in Extreme Conditions (XQCD 2022), Norwegian University of Science and Technology, Trondheim,
Norway, 27 - 29 July (2022)
37 - How dark matter affects compact star’s properties and constraints we put on strongly interacting matter at high densities
Violetta Sagun, Tim Dietrich, Mattia Emma, Edoardo Giangrandi, Oleksii Ivanytskyi, Ilidio Lopes, Francesco Pannarale, Constança Providência, Federico Schianchi
at the “XVth Quark Confinement and the Hadron Spectrum” conference, University of Stavanger, Stavanger, Norway, 1 - 6 August (2022)
38 - The effect of dark matter on compact stars and constraints we put on strongly interacting matter at high densities
Violetta Sagun, Tim Dietrich, Mattia Emma, Edoardo Giangrandi, Oleksii Ivanytskyi, Ilidio Lopes, Francesco Pannarale, Constança Providência, Federico Schianchi
at the Institute for Nuclear Theory workshop (INT-22-2b) “Dark Matter in Compact Objects, Stars, and Low-Energy Experiments ”, Institute for Nuclear Theory, Seattle, USA, 1 August - 2 September (2022)
Poster
39 - Large scale screening of high refractive index materials
Pedro J.M.A. Carriço, Pedro Borlido, Márcio Ferreira, Tiago F.T. Cerqueira
Física2022, 23ª Conferência Nacional de Física, 7-10/9 (2022)
40 - Large scale screening of high refractive index materials
Pedro J.M.A. Carriço, Pedro Borlido, Márcio Ferreira, Tiago F.T. Cerqueira
Física2022, 23ª Conferência Nacional de Física, 7-10/9 (2022)
41 - GW190814 secondary component as a dark matter admixed neutron star
Violetta Sagun, Oleksii Ivanytskyi, Edoardo Giangrandi
at the PHAROS Conference 2022, Rome, Italy, 16 - 19 May (2022)
