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Hadronic matter and QCD in astrophysics: supernovae, GRBs and compact stars

Grant number: 07/03633-3
Support type:Research Projects - Thematic Grants
Duration: March 01, 2008 - February 28, 2013
Field of knowledge:Physical Sciences and Mathematics - Astronomy - Stellar Astrophysics
Principal Investigator:Jorge Ernesto Horvath
Grantee:Jorge Ernesto Horvath
Home Institution: Instituto de Astronomia, Geofísica e Ciências Atmosféricas (IAG). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Co-Principal Investigators:Manuel Máximo Bastos Malheiro de Oliveira
Assoc. researchers:Douglas Galante ; Germán Lugones ; Laura Paulucci Marinho ; Lubianka Ferrari Russo Rossi ; Manuel Máximo Bastos Malheiro de Oliveira ; Marcelo Vidalis ; Marcio Guilherme Bronzato de Avellar ; Reinaldo da Silva Caraca ; Rodolfo Valentim da Costa Lima
Associated grant(s):12/08030-3 - Large perturbations to the biosphere of astrophysical origin, AV.EXT
12/02716-0 - 28th General Assembly of the International Astronomical Union (IAU), AR.EXT
10/16674-2 - Proceedings of the IWARA 2009, PUB.LVR.EXT
Associated scholarship(s):10/05558-1 - On the electrodynamics of neutron stars and overcritical electrodynamical fields in astrophysics, BE.PQ
08/10943-1 - Explosive nucleosynthesis of heavy elements in exotic models, BP.PD
08/03399-3 - Oscillations of quarks stars: the effect of color superconductivity, BP.MS


This thematic project is devoted to study the relationship between strongly interacting matter which populates the QCD phase diagram at high chemical potential and T = 0, with its physical realization (compact stars and their birth events, supernovae and GRBs) constituting nature's natural laboratories. We shall attempt to model the stellar structure and dynamics which can be directly related to the observed phenomenology from high-quality data (stellar spectra, pulsar timing, cooling curves, etc.) with the aim of evaluating the presence of hadronic and quark states in the interiors, without restricting ourselves to 'classical' tests (masses in binary systems), but rather using them as a part of the body of evidence to be accommodated. We shall dedicate attention to microphysics and hydrodynamics of exotic models which postulate the appearance of quark matter (particularly in their self-bound versions SQM and CFL SQM) as an important ingredient for supernova explosions and GRBs. Exact models and relativistic stellar structure will be studied to include electric charge and magnetic fields, not only because of their intrinsic interest but also for the possible applications to actual stellar systems. Finally we shall try to unravel basic unknown facts about magnetars (SGRs and AXPs), considered both as peculiar stellar systems but also because their relation with fundamental questions referred to dense matter in extreme magnetic fields. (AU)

Articles published in Pesquisa FAPESP Magazine about the research grant:
The heavyweights of the Universe 

Scientific publications (5)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
PAULUCCI, L.; HORVATH, J. E. Strange quark matter fragmentation in astrophysical events. Physics Letters B, v. 733, p. 164-168, JUN 2 2014. Web of Science Citations: 17.
COELHO, JAZIEL G.; MALHEIRO, MANUEL. Magnetic dipole moment of soft gamma-ray repeaters and anomalous X-ray pulsars described as massive and magnetic white dwarfs. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN, v. 66, n. 1 FEB 2014. Web of Science Citations: 19.
ALBERTO, P.; DE CASTRO, A. S.; MALHEIRO, M. Spin and pseudospin symmetries of the Dirac equation with confining central potentials. Physical Review C, v. 87, n. 3 MAR 4 2013. Web of Science Citations: 34.
MALHEIRO, MANUEL; RUEDA, JORGE A.; RUFFINI, REMO. SGRs and AXPs as Rotation-Powered Massive White Dwarfs. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN, v. 64, n. 3 JUN 25 2012. Web of Science Citations: 48.
LOURENCO, O.; DUTRA, M.; FREDERICO, T.; DELFINO, A.; MALHEIRO, M. Vector interaction strength in Polyakov-Nambu-Jona-Lasinio models from hadron-quark phase diagrams. Physical Review D, v. 85, n. 9 MAY 25 2012. Web of Science Citations: 28.

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