# 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)