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 - Non-radial oscillation modes in hybrid stars: consequences of a mixed phase
Deepak Kumar, Hiranmaya Mishra and Tuhin Malik
J. Cosmol. Astropart. Phys. 2023(2), 015 (2023)

3 - Spanning the full range of neutron star properties within a microscopic description
Tuhin Malik, Márcio Ferreira, Milena Bastos Albino, Constança Providência
Phys. Rev. D 107, 103018 (2023)

4 - Photodynamical analysis of the nearly resonant planetary system WASP-148 Accurate transit-timing variations and mutual orbital inclination
JM Almenara, G Hebrard, RF Diaz, J Laskar, ACM Correia, DR Anderson, I Boisse, X Bonfils, DJA Brown, V Casanova, AC Cameron, M Fernandez, JM Jenkins, F Kiefer, AL Des Etangs, JJ Lissauer, G Maciejewski, J McCormac, H Osborn, Pollacco
Astron. Astrophys. 663, A134 (2022)

5 - 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)

6 - Detection of the tidal deformation of WASP-103b at 3 sigma with CHEOPS
SCC Barros, B Akinsanmi, AMS Smith, J Laskar, S Ulmer-Moll, J Lillo-Box, D Queloz, AC Cameron, SG Sousa, D Ehrenreich, MJ Hooton, G Bruno, BO Demory, ACM Correia, ODS Demangeon, TG Wilson, A Bonfanti, S Hoyer, Y Alibert, R Alonso, Esc
Astron. Astrophys. 657, A52 (2022)

7 - Dynamics of co-orbital exoplanets in a first-order resonance chain with tidal dissipation
J Couturier, P Robutel, ACM Correia
Astron. Astrophys. 664, A1 (2022)

8 - Heavy baryons in hot stellar matter with light nuclei and hypernuclei
T Custodio, H Pais, C Providencia
Phys. Rev. C 105(6), 065803 (2022)

9 - 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)

10 - 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)

11 - 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)

12 - Delta baryons in neutron stars
Kauan D. Marquez, Débora P. Menezes, Helena Pais, Constança Providência
Phys. Rev. C 106, 055801 (2022)

13 - Polytropic fits of modern and unified equations of state
Lami Suleiman, Morgane Fortin, Julian Leszek Zdunik, Constanca Providencia
Phys. Rev. C 106, 035805 (2022)

14 - Warm inflation, neutrinos and dark matter: a minimal extension of the Standard Model
M Levy, JG Rosa, LB Ventura
J. High Energy Phys. 12, 176 (2022)

15 - Numerical simulations of dark matter admixed neutron star binaries
M. Emma, F. Schianchi, Francesco, F. Pannarale, Violetta Sagun, T. Dietrich
Particles 5, 273 (2022)

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

17 - 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)

18 - Extracting nuclear matter properties from the neutron star matter equation of state using deep neural networks
Márcio Ferreira, Valéria Carvalho, Constança Providência
Phys. Rev. D 106, 103023 (2022)

19 - 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)

20 - 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)

21 - 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)

22 - BEBOP II: sensitivity to sub-Saturn circumbinary planets using radial-velocities
MR Standing, AHMJ Triaud, JP Faria, DV Martin, I Boisse, ACM Correia, M Deleuil, G Dransfield, M Gillon, G Hebrard, C Hellier, V Kunovac, PFL Maxted, R Mardling, A Santerne, L Sairam, S Udry
Mon. Not. R. Astron. Soc. 511(3), 3571-3583 (2022)

23 - Heavy baryons in hot stellar matter with light nuclei and hypernuclei
Tiago Custódio, Helena Pais, Constança Providência
Phys. Rev. C 105, 065803 (2022)

24 - A possible trial beyond the conventional random phase approximation for the su(2)-Lipkin model including the case of nonclosed shell system
Y Tsue, C Providencia, J da Providencia, M Yamamura
Int. J. Mod. Phys. E 31(05), 2250055 (2022)

25 - Bayesian inference of signatures of hyperons inside neutron stars
Tuhin Malik and Constança Providência
Phys. Rev. D 106, 063024 (2022)

26 - 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)

27 - Inner crust equations of state for CompOSE
Tuhin Malik, Helena Pais
Eur. Phys. J. A 58, 154 (2022)

28 - 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)

29 - CompOSE reference manual
S Typel, M Oertel, T Klahn, D Chatterjee, V Dexheimer, C Ishizuka, M Mancini, J Novak, H Pais, C Providencia, AR Raduta, M Servillat, L Tolos
Eur. Phys. J. A 58(11), 221 (2022)

30 - Statistical multifragmentation model within the extended morphological thermodynamics approach
V. S. Kucherenko, K. A. Bugaev, Violetta Sagun, O. Ivanytskyi
Ukr. J. Phys. 67, No. 9, 639 (2022)

31 - 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)

32 - 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)

Portuguese Journals

33 - O que são materiais “frustrados’’?
Constança Providência
Gazeta de Física (secção Vamos Experimentar!) 4 vol 44, 24 (2022)

34 - Porque está a mudar o clima?
Constança Providência
Gazeta de Física (secção Vamos Experimentar!) 1/2 vol 3, 66 (2022)

35 - O que é o vento?
Constança Providência, Helena Arede, Marta Henriques, Joana Pancas, Rita Wolters
Gazeta de Física (secção Vamos Experimentar!) 45 (3), 26 (2022)

Proceedings

International Conferences

36 - Tidal deformability as a probe of dark matter in neutron stars
D. R. Karkevandi, S. Shakeri, Violetta Sagun, O. Ivanytskyi
Intern. J. Mod. Phys. D, Proceedings of the Sixteenth Marcel Grossmann Meeting on General Relativity Online; 5-10 July 2021., 3713-3731 (2023)

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

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

39 - Hybrid stars with large strange quark cores
Márcio Ferreira, Renan Câmara Pereira, Constança Providência
EPJ Web Conf. (Contribution to Confinement XV) 274, 07001 (2022)

40 - Hybrid stars from a constrained equation of state
Márcio Ferreira, Renan Câmara Pereira, Constança Providência
EPJ Web Conf. (Contribution to vConf21) 258, 07001 (2022)

41 - Effect of anti-VEGF presentation in controlling vascular development
R Travasso, AI Costa-Pereira, F Sousa, M Gouveia, F Ferreira, J Bessa, B Sarmento, IM Pinto
Eur. J. Clin. Invest. 52(1) (2022)

42 - How does dark matter affect compact star properties and high density constraints of strongly interacting matter
Violetta Sagun, E. Giangrandi, O. Ivanytskyi, C. Providência, T. Dietrich
EPJ Web Conf., Proceedings of the 15th Quark Confinement and the Hadron Spectrum Conference (QConf) 274, 07009 (2022)

43 - Constraints on the fermionic dark matter from observations of neutron stars
Violetta Sagun, E. Giangrandi, O. Ivanytskyi, I. Lopes, K. A. Bugaev
Proceedings of Science (PoS), Proceedings of the Particles and Nuclei International Conference (PANIC2021) 380, 313 (2022)

Communications

Invited

44 - As super-propriedades das estrelas de neutrões!
Constança Providência
Rómulo CCVUC Ciência às seis 18 de janeiro (2022)

45 - he complex composition of neutron stars: heavy baryons, kaon condensates and light nuclei and hypernuclei
Constança Providência
Mini Simposium Baryons: from the lab to neutron stars (HADES meeting, 23 September 2022, University of Coimbra) (2022)

46 - Nos Ínfimos do Universo: Estrelas de neutrões como laboratórios de física nuclear e de partículas
Constança Providência
ENEF - Encontro Nacional dos Estudantes de Física UBI, 24-27 Setembro (2022)

47 - Learning about high density nuclear matter equation of state from neutron stars
Constança Providência, Márcio Ferreira, Tuhin Malik
Workshop "From holography to machine learning" (Helsinki, Finland) (2022)

48 - 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)

49 - 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)

50 - Thermal evolution of compact stars
Violetta Sagun
Invited seminar at the Institute for Theoretical Physics, University of Wroclaw, Wroclaw, Poland, 29 April (2022)

51 - 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)

52 - 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)

53 - 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)

Oral

54 - 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)

55 - Compact stars as dark matter probes
Violetta Sagun, T. Dietrich, M. Emma, E. Giangrandi, O. Ivanytskyi, I. Lopes, F. Pannarale, C. Providência, F. Schianchi
at the Kashiwa Dark Matter symposium, University of Tokyo, Tokyo, Japan, November 29 - December 2 (2022)

56 - 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)

57 - 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)

58 - 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

59 - 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)

60 - 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)

61 - The effect of dark matter on neutron stars and their merger dynamics
Violetta Sagun, E. Giangrandi, O. Ivanytskyi, T. Dietrich, C. Providência
at the Gravitational Wave Physics and Astronomy Workshop 2022 (GWPAW), Melbourne, Australia, 5-9 December (2022)

62 - 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)

Other

63 - Probing hybrid stars and the properties of the special points with radial oscillations
C. Gärtlein, O. Ivanytskyi, Violetta Sagun, D. Blaschke
arXiv:2301.10765 [nucl-th] (2023)

64 - The effect of self-interacting bosonic dark matter on neutron star properties
E. Giangrandi, Violetta Sagun, O. Ivanytskyi, C. Providência, T. Dietrich
submitted to Astroph. J. Preprint arXiv:2209.10905 [astro-ph.HE] (2023)

65 - Quasi-equilibrium configurations of binary systems of dark matter admixed neutron stars
H. R. Rüter, Violetta Sagun, W. Tichy, T. Dietrich
e-Print: 2301.03568 [gr-qc] (2023)

66 - Estrelas de neutrões: um laboratório de física nuclear, física de partículas e relatividade geral
Constança Providência
Palestra Outreach: Escola Secundária Infanta D. Maria 20 abril (2022)

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

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

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

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