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

Chapters of Books

1 - Constraining the Nuclear Matter EoS from the Properties of Celestial Objects
Bijay Kumar Agrawal and Tuhin Malik
Nuclear Structure Physics, CRC Press. Chapter 14, 317 (2021)

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 - 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)

4 - Spontaneous breaking of the Peccei-Quinn symmetry during warm inflation
JG Rosa, Luís B. Ventura
submitted not yet accepted [arXiv: 2105.05771] (2022)

5 - Evaporation of a Kerr-black-bounce by emission of scalar particles
Marco Calzà
Submitted not yet accepted (2022)

6 - Local solutions of General Relativity in the presence of the Trace Anomaly
Marco Calzà, Alessandro Casalino, Lorenzo Sebastiani
Phys. Dark Univ. 37, 101066 (2022)

7 - Evaporating primordial black holes, the string axiverse, and hot dark radiation
Marco Calzà, John March-Russell, João G. Rosa
Submitted not yet accepted (2022)

8 - 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)

9 - 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)

10 - Superradiant pion clouds around primordial black holes
Paulo B. Ferraz, Thomas W. Kephart, JG Rosa
submitted not yet accepted [arXiv:2004.11303] (2022)

11 - 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)

12 - Inner crust equations of state for CompOSE
Tuhin Malik, Helena Pais
The European Physical Journal A 58, 154 (2022)

13 - 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)

14 - Spin in a planar relativistic fermion problem
A.S.de Castro, P. Alberto
Phys. lett., A 404, 127412 (2021)

15 - Central configurations of the five-body problem with two isosceles triangles
Antonio Carlos Fernandes, Luis Fernando Mello, Bráulio Garcia, Lucas Ruiz dos Santos
J. Appl. Math. Phys. 72 (2021)

16 - Neutron stars within the Bogoliubov quark-meson coupling model
Aziz Rabhi, Constança Providência, Steven A. Moszkowski, João da Providência, Henrik Bohr
Phys. Rev. C 103, 035811 (2021)

17 - Constraining nuclear matter parameters from correlation systematics: a mean-field perspective
B.K. Agrawal, Tuhin Malik, J.N. De, S.K. Samaddar
The European Physical Journal Special Topics 230, 517-542 (2021)

18 - Radio astronomy and Space science in Azores: Enhancing the Atlantic VLBI infrastructure cluster
D Barbosa, B Coelho, S Anton, M Bergano, T Boekholt, ACM Correia, D Maia, J Pandeirada, V Ribeiro, J Adams, JP Barraca, D Gomes, B Morgado
Adv. Space Res. 68(7), 3064-3078 (2021)

19 - Thermal production of sexaquarks in heavy-ion collisions
D. Blaschke, L. Bravina, K. Bugaev, G. R. Farrar, B. Grinyuk, O. Ivanytskyi, S. Kabana, S. V. Kuleshov, I. K. Potashnikova, Violetta Sagun, A. Taranenko, O. V. Vitiuk, E. Zabrodin, X. Zhang, D. Zhou
Intern. J. Mod. Phys. A 36, 2141005 (2021)

20 - Revisiting the analysis of HW Virginis eclipse timing data. I. A frequentist data modeling approach and a dynamical stability analysis
Esmer, E.M., O. Baştürk, T.C. Hinse, S.O. Selam, ACM Correia
Astron. Astrophys. 648, A85 (2021)

21 - A New Sample of Gamma-Ray Emitting Jetted Active Galactic Nuclei-Preliminary Results
L Foschini, ML Lister, S Anton, M Berton, S Ciroi, MJM Marcha, M Tornikoski, E Jarvela, P Romano, S Vercellone, E Dalla Bonta
Universe 7(10), 372 (2021)

22 - A Nonequilibrium Information Entropy Approach to Ternary Fission of Actinides
G. Röpke, J. B. Natowitz, H. Pais
Phys. Rev. C 103, L061601 (2021)

23 - Strong magnetic fields: neutron stars with an extended inner crust
Helena Pais, Bruno Bertolino, Jianjun Fang, Xiaopeng Wang, Constança Providência
Eur. Phys. J. A 57, 193-1-193-9 (2021)

24 - An analytical model for tidal evolution in co-orbital systems. I. Application to exoplanets
J. Couturier, P. Robutel, A.C.M. Correia
Celest. Mech. Dyn. Astron. 133(8), 37 (2021)

25 - Phase diagram for strongly interacting matter in the presence of a magnetic field using the Polyakov–Nambu–Jona-Lasinio model with magnetic field dependent coupling strengths
João Moreira, Pedro Costa, Tulio E. Restrepo,
Eur. Phys. J. A 57, 123-10 (2021)

26 - Induced surface and curvature tension equation of state for hadron resonance gas in finite volumes and its relation to morphological thermodynamics
K. A. Bugaev , O. V. Vitiuk , B. E. Grinyuk , P. P. Panasiuk , N. S. Yakovenko , E. S. Zherebtsova , Violetta Sagun , O. I. Ivanytskyi , L. V. Bravina , D. B. Blaschke , S. Kabana , S. V. Kuleshov , A. V. Taranenko , E. E. Zabrodin and G. M. Zinovjev
Intern. J. Mod. Phys. A 36, No. 34n35, 2141009 (2021)

27 - Tidal deformability of neutron stars with exotic particles within a density dependent relativistic mean field model in R-squared gravity
K. Nobleson, Tuhin Malik, Sarmistha Banik
Journal of Cosmology and Astroparticle Physics (JCAP) 08, 12 (2021)

28 - Six transiting planets and a chain of Laplace resonances in TOI-178
A. Leleu, Y. Alibert, N.C. Hara, M.J. Hooton, T.G. Wilson, P. Robutel, J.-B. Delisle, J. Laskar, S. Hoyer, C. Lovis, E.M. Bryant, E. Ducrot, J. Cabrera, L. Delrez, J.S. Acton, V. Adibekyan, R. Allart, C. Allende Prieto, ACM Correia
Astron. Astrophys. 649, A26 (2021)

29 - Faint objects in motion: the new frontier of high precision astrometry
Malbet, F., Boehm, C., Alexandre C. M. Correia, et. al.
Exp. Astron. 51(3), 845-886 (2021)

30 - Towards a reliable effective field theory of inflation
Mar Bastero-Gil, Arjun Berera, Rudnei O. Ramos, JG Rosa
Phys. Lett. B 813, 136055 (2021)

31 - New constraints on the planetary system around the young active star AU Mic. Two transiting warm Neptunes near mean-motion resonance
E. Martioli, G. Hébrard, A.C.M. Correia, J. Laskar, Lecavelier des Etangs
Astron. Astrophys. 649, A177 (2021)

32 - Warm Inflation, Neutrinos and Dark matter: a minimal extension of the Standard Model
Miguel Levy, JG Rosa, Luís B. Ventura
J. High Energy Phys.. 12, 176 (2021)

33 - Thermal evolution of relativistic hyperonic compact stars with calibrated equations of state
Morgane Fortin, Adriana R. Raduta, Sidney Avancini, Constança Providência
Phys. Rev. D 103, 083004 (2021)

34 - Unveiling the nuclear matter EoS from neutron star properties: a supervised machine learning approach
Márcio Ferreira, Constança Providência
J. Cosmol. Astropart. Phys 7, 011 (2021)

35 - Constraints on high density equation of state from maximum neutron star mass
Márcio Ferreira, Constança Providência
Phys. Rev. D 104, 063006 (2021)

36 - Crust-core transition of a neutron star: effect of the temperature under strong magnetic fields
Márcio Ferreira, Aziz Rabhi, Constança Providência
Eur. Phys. J. A 57, 263 (2021)

37 - Hybrid stars with large strange quark cores constrained by GW170817
Márcio Ferreira, Renan Câmara Pereira, Constança Providência )
Phys. Rev. D 103, 123020 (2021)

38 - Critical properties of calibrated relativistic mean-field models for the transition to warm, nonhomogeneous nuclear and stellar matter
Olfa Boukari, Helena Pais, Sofija Antić, Constança Providência
Phys. Rev. C 103, 055804 (2021)

39 - Analytic continuation of nucleon electromagnetic form factors in the time-like region
P. Alberto , A. Drago, A. Mangoni, S. Moretti, S. Pacetti
J. Phys. G: Nucl. Part. Phys. 48, 085007 (2021)

40 - Determination of the symmetry energy from the neutron star equation of state
Pedro Barata de Tovar, Márcio Ferreira, Constança Providência
Phys. Rev. D 104, 123036 (2021)

41 - Binding energy shifts from heavy-ion experiments in a nuclear statistical equilibrium model
S. Mallik, H. Pais, F. Gulminelli
Eur. Phys. J. A 27, 262 (2021)

42 - Thermal evolution of neutron stars described within the equation of state with induced surface tension
S. Tsiopelas, V. Sagun
Astron. Nachrichten 342(1-2), 332-336 (2021)

43 - Light hyperclusters and hyperons in low-density hot stellar matter
Tiago Custódio, Helena Pais, Constança Providência
Phys. Rev. C 104, 035801 (2021)

44 - New equation of state involving Bose–Einstein condensate of antikaon for supernova and neutron star merger simulations
Tuhin Malik, Sarmistha Banik, Debades Bandyopadhyay
Eur. Phys. J.: Spec. Top. 230, 561-566 (2021)

45 - Equation-of-state Table with Hyperon and Antikaon for Supernova and Neutron Star Merger
Tuhin Malik, Sarmistha Banik, Debades Bandyopadhyay
The Astrophysical Journal (APJ) 910, 96 (2021)

Portuguese Journals

46 - É eletricidade ou magnetismo?
Constança Providência
Gazeta de Física Volume 43 / Fascículo 3/4, 32 (2021)

47 - Fontanários: brincando com a Física!
Constança Providência
Gazeta de Física 44, fasc 1, 42-44 (2021)

Proceedings

International Conferences

48 - Evaporating primordial black holes, the string axiverse, and hot dark radiation
Marco Calzà
27th PASCOS conference, Max Planck institute (Heidelberg) (2022)

49 - Evaporating primordial black holes, the string axiverse, and hot dark radiation
Marco Calzà
IberiCOS2022, University of Barcelona (2022)

50 - Hybrid stars from a constrained equation of state
Constança Providência, Márcio Ferreira, Renan Pereira
to appear in AIP Conf Proc (2021)

51 - Kinematic reconstruction of extended theories of gravity at small and intermediate redshifts
Marco Calzà
15th IberiCOS meeting, University of Coimbra (2021)

52 - Evaporating primordial black holes, the string axiverse, and hot dark radiation
Marco Calzà
XVI Black Holes Workshop, University of Aveiro (2021)

Communications

Invited

53 - Neutron star properties from a constrained EoS
Constança Providência, Márcio Ferreira, Renan Pereira
vConf21 - A Virtual Tribute to Quark Confinement and the Hadron Spectrum 2021 - 2-6 August 2021 (2021)

54 - On the eccentricity of warm Neptunes
Correia, ACM
1st Planet Systems Day @ IA, February 2, online meeting. (2021)

55 - Primordial black hole superradiance
JG Rosa
Invited seminar at Dartmouth College, USA (online). 24 June 2021 (2021)

56 - Evaporating primordial black holes, the string axiverse, and hot dark radiation
Marco Calzà
University of Trento, 21th of December (2021)

Oral

57 - New SST Optical Sensor of Pampilhosa da Serra: studies on image processing algorithms and multi-filter characterization of Space Debris
Coelho, B., Barbosa, D., Bergano, M., Correia, A.C.M., Freitas, J., Marques, P., Pandeirada, J., Ribeiro, V.
8th European Conference on Space Debris, 20-23 April (online meeting) (2021)

58 - Acoplamento spin-órbita em sistemas planetários compactos
Correia, A.C.M.
XX Colóquio Brasileiro de Dinâmica Orbital, 6-10 December (online meeting) (2021)

59 - Asynchronous and chaotic rotation for compact planetary systems
Correia, A.C.M.
Multi-scale (time and mass) dynamics of space objects, 18-22 October, Iasi, Romania (online meeting) (2021)

60 - Nonzero eccentricities of warm Neptunes
Correia, A.C.M.
PLATO Mission Conference, 11-15 October (online meeting) (2021)

61 - Evolution of the Pluto-Charon binary under tides
Correia, ACM
52nd Annual Meeting of the DDA, 17-21 May, virtual workshop (2021)

62 - Tidal Evolution of the Pluto-Charon-Sun Triple
Correia, ACM
Triple Evolution and Dynamics 3, 22-25 March, virtual workshop (2021)

63 - Asynchronous and chaotic rotation for compact planetary systems
Correia, ACM
Exoplanets Orbits & Dynamics, 19-22 January, virtual workshop (2021)

64 - Bosonic Dark Matter in Neutron Stars and Gravitational Waves
D. R. Karkevandi, S. Shakeri, Violetta Sagun, O. Ivanytskyi
at the Sixteenth Marcel Grossmann Meeting (MG16), online, 5-10 July (2021)

65 - The impact of dark matter on compact stars
Edoardo Giangrandi, Violetta Sagun, Constança Providência, Tim Dietrich
at the 10th IDPASC School - IDPASC (Nazarè, Portugal), online, 6-17 September (2021)

66 - Impact of asymmetric bosonic dark matter on neutron star properties
Edoardo Giangrandi, Violetta Sagun, Oleksii Ivanytskyi, Constança Providência, Tim Dietrich
XII Conference of Young Scientists "Problems of Theoretical Physics" - Bogolyubov Institute for Theoretical Physics (Kyiv, Ukraine), online, 21-23 December (2021)

67 - Probing strongly interacting matter properties with compact objects
Edoardo Giangrandi, Violetta Sagun, Oleksii Ivanytskyi, Constança Providência, Tim Dietrich
at the 21th Zimányi School, Winter Workshop on Heavy-Ion Physics, Budapest, Hungary, 6-10 December (2021)

68 - Primordial black hole superradiant instabilities
JG Rosa
XIV Black Holes Workshop, Universidade de Aveiro (21/12/2021) (2021)

69 - The Axiverse and how to probe it exploiting evaporating primordial black holes.
Marco Calzà
Journal Club, University of Coimbra, 25th of November (2021)

70 - Local solutions in modified gravity adopting ad hoc ansatz
Marco Calzà
Journal Club, University of Coimbra, 7th of October (2021)

71 - The unified equation of state with induced surface tension consistent with astrophysical, gravitational, high- and low- energy nuclear physics data
Violetta Sagun, O. Ivanytskyi, Constança Providência
at the Virtual Tribute to Quark Confinement and the Hadron Spectrum 2021 - ConfXIV, 2-6 August (2021)

72 - Neutron stars as dark matter probes
Violetta Sagun, O. Ivanytskyi, D. R. Karkevandi, S. Shakeri, I. Lopes
at the Modern Physics of Compact Stars and Relativistic Gravity, Yerevan, Armenia, 27-30 September (2021)

73 - Constraints on the fermionic dark matter from observations of neutron stars
Violetta Sagun, O. Ivanytskyi, I. Lopes
at the Particles and Nuclei International Conference - PANIC2021, online, 5-10 September (2021)

74 - The impact of dark matter on compact stars
Violetta Sagun, O. Ivanytskyi, I. Lopes
The 57 Karpacz Winter School in Theoretical Physics, Karpacz, Poland, 13-19 June (2021)

75 - How neutron stars can help us to constrain dark matter
Violetta Sagun, O. Ivanytskyi, I. Lopes
The Iberian Cosmology Meeting (IberiCOS 2021), University of Coimbra, Coimbra, 29 March - 1 April (2021)

Poster

76 - Large scale screening of high refractive index materials
Pedro J.M.A. Carriço, Pedro Borlido, Márcio Ferreira, F.T. Cerqueira
Física2022, 23ª Conferência Nacional de Física, 7-10/9 (2022)

77 - Large scale screening of high refractive index materials
Pedro J.M.A. Carriço, Pedro Borlido, Márcio Ferreira, F.T. Cerqueira
Física2022, 23ª Conferência Nacional de Física, 7-10/9 (2022)

78 - Probing dark matter with neutron stars
Violetta Sagun, O. Ivanytskyi, D. R. Karkevandi, S. Shakeri, E. Giangrandi, I. Lopes
at the Gravitational Wave Physics and Astronomy Workshop (GWPAW 2021), Hannover, Germany, 14-17 December (2021)

Thesis

MSc thesis

79 - Asymmetric Baryo/Darkgenesis
Duarte Miguel Coelho Silva
Master Thesis in Physics, Univ. Coimbra (2021)

Other

80 - Ceres – o asteroide planeta anão
Correia, A.C.M.
Boletim da Associação dos Pupilos do Exército 262, 12 (2021)

81 - Observatório SKA
Correia, A.C.M.
Boletim da Associação dos Pupilos do Exército 260, 12 (2021)

82 - Tooling4G – Minimize the Airflow Generated Noise on Automotive HVAC Systems
J. F. Caseiro, P. Alberto
White Papers – SHAPE Projects PRACE-6IP (2021)