RESEARCH INTERESTS
General relativity, cosmology, black holes, singularities, semi-classical approaches to quantum gravity.
My interests in General Relativity cover exact solutions of Einstein’s field equations and analytical models for astrophysics and cosmology, Hamiltonian formulation of gravity and possible approaches to quantum gravity.
– Gravitational collapse: In the framework of spherical collapse I have been working on the role played by pressures in the formation of black holes or naked singularities as the end-state of the complete collapse of a gravitating object.
– Quantum-gravity: I have been working on the effects of small scale modifications to the classical relativistic framework for collapse. Quantum-gravity induced effects are thought to be important in the strong field regime towards the end of collapse and they might help resolve the formation of classical singularities.
– Compact objects: I have been working on theoretical dynamical scenarios that lead to the formation of compact objects (not necessarily black holes). These compact sources can be used to model the remnants of supernovae explosions as well as the supermassive object that exist at the center of galaxies.
– Observational features of naked singularities and exotic compact objects: I haveve been working on the possible observational signatures of exotic compact sources as described by spacetimes with naked singularities. I studied the properties of accretion disks around a variety of spherically symmetric and axially symmetric spacetimes and compared with the properties of disks around a Schwarzschild black hole.
– Axially symmetric space-times: I studied topological and physical properties of axially symmetric metrics and I have been working on the construction of physically viable sources for a specific class of static metrics.
– Thin matter shells: I studied the dynamics of thin shells with general equation of state. Shells can be used as theoretical toy models to investigate gravitational collapse issues and as possible sources for dark energy and dark matter.
– Hamiltonian gravity: I have been studying the Hamiltonian formulation of gravity and specifically thin shells systems in the canonical framework. In particular I’ve been working on the derivation of equations of motion from variational principles and the Hamiltonian formulation for a system composed of n spherical thin matter shells with general equation of state that correctly reproduces the ADM mass of the system.
PERSONAL INFORMATION
I was born in Milan, Italy. I got my masters degree and Ph.D in Milan. During the Ph.D I spent one year at the Institute of Physics of the Polish Academy of Sciences in Warsaw, Poland. I did Postdocs in Poland (Institute if Mathematics of The Polish Academy of Sciences, Warsaw), India (Tata Institute of Fundamental Research, Mumbai) and China (Fudan University, Shanghai). Besides science I have a passion for science fiction (I wrote a novel together with two other people), cinema, theater (I wrote and staged a play in 2007 in Milan) and tennis (I write occasionally for a tennis website and a magazine).
Observational properties of rigidly rotating dust configurationsMalafarina, D., Bambi, C., Ilyas, B., Yang, J.,
2017 In : European Physical Journal C. 77, p. 461
Classical collapse to black holes and quantum bounces: A reviewMalafarina, D.,
2017 In : Universe. 3, 2, p. 48
Gravitational collapse of Hagedorn fluidsMalafarina, D.,
2016 In : Physical Review D - Particles, Fields, Gravitation and Cosmology. 93, 10,
Genericity aspects of black hole formation in the collapse of spherically symmetric slightly inhomogeneous perfect fluidsSatin, S., Malafarina, D., Joshi, P.,
2016 In : International Journal of Modern Physics D. 25, 2,
Gravitational collapse to black holes and moreMalafarina, D.,
2016 Springer Proceedings in Physics. Springer Science and Business Media, LLC, 170, p. 103-109
A Brief Review of Relativistic Gravitational CollapseMalafarina, D.,
2016 Astrophysics of Black Holes: From Fundamental Aspects to Latest Developments.
Compact objects from gravitational collapse: an analytical toy modelMalafarina, D., Joshi, P.,
2015 In : European Physical Journal C. 75, 12, p. 1-8
All black holes in Lemaître-Tolman-Bondi inhomogeneous dust collapseJoshi, P., Malafarina, D.,
2015 In : Classical and Quantum Gravity. 32, 14,
Gravitational blueshift from a collapsing objectKong, L., Malafarina, D., Bambi, C.,
2015 In : Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 741, p. 82-86
Singularity avoidance in quantum-inspired inhomogeneous dust collapseLiu, Y., Malafarina, D., Modesto, L., Bambi, C.,
2014 In : Physical Review D - Particles, Fields, Gravitation and Cosmology. 90, 4,
Can we observationally test the weak cosmic censorship conjecture?Kong, L., Malafarina, D., Bambi, C.,
2014 In : European Physical Journal C. 74, 8, p. 1-12
Singularity avoidance in classical gravity from four-fermion interactionBambi, C., Malafarina, D., Marcianò, A., Modesto, L.,
2014 In : Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 734, p. 27-30
Note on the effect of a massive accretion disk in the measurements of black hole spinsBambi, C., Malafarina, D., Tsukamoto, N.,
2014 In : Physical Review D - Particles, Fields, Gravitation and Cosmology. 89, 12,
Distinguishing black holes from naked singularities through their accretion disc propertiesJoshi, P., Malafarina, D., Narayan, R.,
2014 In : Classical and Quantum Gravity. 31, 1,
Terminating black holes in asymptotically free quantum gravityBambi, C., Malafarina, D., Modesto, L.,
2014 In : European Physical Journal C. 74, 2, p. 1-10
Kα iron line profile from accretion disks around regular and singular exotic compact objectsBambi, C., Malafarina, D.,
2013 In : Physical Review D - Particles, Fields, Gravitation and Cosmology. 88, 6,
Non-singular quantum-inspired gravitational collapseBambi, C., Malafarina, D., Modesto, L.,
2013 In : Physical Review D - Particles, Fields, Gravitation and Cosmology. 88, 4,
Instability of black hole formation under small pressure perturbationsJoshi, P., Malafarina, D.,
2013 In : General Relativity and Gravitation. 45, 2, p. 305-317
Genericity aspects in gravitational collapse to black holes and naked singularitiesJoshi, P., Malafarina, D., Saraykar, R.,
2012 In : International Journal of Modern Physics D. 21, 8,
Circular geodesics and accretion disks in the Janis-Newman-Winicour and gamma metric spacetimesChowdhury, A., Patil, M., Malafarina, D., Joshi, P.,
2012 In : Physical Review D - Particles, Fields, Gravitation and Cosmology. 85, 10,
Recent developments in gravitational collapse and spacetime singularitiesJoshi, P., Malafarina, D.,
2011 In : International Journal of Modern Physics D. 20, 14, p. 2641-2729
Equilibrium configurations from gravitational collapseJoshi, P., Malafarina, D., Narayan, R.,
2011 In : Classical and Quantum Gravity. 28, 23,
Gravitational collapse with tangential pressureMalafarina, D., Joshi, P.,
2011 In : International Journal of Modern Physics D. 20, 4, p. 463-495
Naked singularities as particle accelerators. IIPatil, M., Joshi, P., Malafarina, D.,
2011 In : Physical Review D - Particles, Fields, Gravitation and Cosmology. 83, 6,
Instability of black hole formation in gravitational collapseJoshi, P., Malafarina, D.,
2011 In : Physical Review D - Particles, Fields, Gravitation and Cosmology. 83, 2,
The Hamiltonian formulation for the dynamics of a multishell self-gravitating systemKijowski, J., Magli, G., Malafarina, D.,
2010 In : Journal of Mathematical Physics. 51, 7,
The general exact solution for relativistic spherical shellsKijowski, J., Magli, G., Malafarina, D.,
2009 In : International Journal of Modern Physics D. 18, 12, p. 1801-1808
Hamiltonian formulation of spherical shell's dynamics from first principlesKijowski, J., Magli, G., Malafarina, D.,
2009 In : Reports on Mathematical Physics. 64, 1-2, p. 241-247
Variational priciples and hamiltonian formulation of spherical shell dynamicsKijowski, J., Magli, G., Malafarina, D.,
2008 11th Marcel Grossmann Meeting on Recent Developments in Theoretical and Experimental General Relativity, Gravitation and Relativistic Field Theories - Proc. of the MG11 Meeting on General Relativity. p. 2346-2348
New derivation of the variational principle for the dynamics of a gravitating spherical shellKijowski, J., Magli, G., Malafarina, D.,
2006 In : Physical Review D - Particles, Fields, Gravitation and Cosmology. 74, 8,
Lagrangian and Hamiltonian formulation of spherical shell dynamicsKijowska, J., Magli, G., Malafarina, D.,
2005 In : International Journal of Geometric Methods in Modern Physics. 2, 5, p. 887-894
Non-spherical sources of static gravitational fields: Investigating the boundaries of the no-hair theoremHerrera, L., Magli, G., Malafarina, D.,
2005 In : General Relativity and Gravitation. 37, 8, p. 1371-1383
Static axially symmetric sources of the gravitational fieldMalafarina, D., Magli, G., Herrera, L.,
2005 AIP Conference Proceedings. 751, p. 185-187