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Universidad de Salamanca
M. Ángeles Pérez García
Department of Fundamental Physics
 
nstar

My research

 

I am a member of  the theoretical physics group at the the Fundamental Physics Department and Instituto Universitario de Física Fundamental y Matemáticas (IUFFyM). My funding resources include Junta de Castilla y León  SA096P20 and  Spanish Ministry of Science PID2019- 107778GB-I00, RED2022-134411-T, and PID2022-137887NB-I00. They include FEDER funds.

            

My present field of research is theoretical physics including lagrangian models to describe new physics in Beyond Standard Model theories.  I am mostly interested in extreme conditions of matter inside compact stars such as pulsars (neutron stars). These objects appear in the aftermath of a supernova core collapse like, for example, SN 1987 A.

I belong to the REDONGRA network  (on gravitational waves

and  dark matter  MULTIDARK network            logo_multidark_baja_resolucion_marcoblanco

focused on the multimessenger approach to constrain dark matter (DM) properties through accretion onto compact stars. For example, self-annihilation of DM-particles could drive effects in the inner core of neutron stars that may lead to a  quark deconfinement phase transition. On a different approach, milli-charged DM may also be enhanced in pulsar magnetospheres.

In this same line,  this central engine  in the transition may be relevant for ultra-high energy cosmic rays, since newly formed lumps of quark matter particles have a peculiar Z/A (charge-to-mass ratio) being less easily deflected or stopped by the interstelar medium. In addition, large energies of about 1048-54  erg could be released in the neutron star to the (hybrid) quark star transition. Relativistic ejection of matter may lead to the gamma ray burst emission, detectable as a short burst by Fermi-LAT or Swift, for example.

I am a member of the present ESF e-COST network  PHAROS that is a continuation of the former ESF networks COMPSTAR and newCompstar

compstar-logo

to study compact stars in a variety of ways ranging from computational simulations, observation and theoretical nuclear astrophysical models. We organized an international workshop, the II Iberian Nuclear Astrophysics meeting in September  2011 on these subjects. You can take a look at the proceedings at http://iopscience.iop.org/1742-6596/342/1

I am also interested in neutrino physics, since it constitutes a clean signal of matter under extreme conditions and allows   the determination of nuclear observables in compact objects as they cool.

Another project that I am interested on is an analysis of the dynamical simulation of the crust of neutron stars and pasta  phases. This type of matter can happen in the exterior shells of Neutron Stars formed in the aftermath of a Supernova core collapse event.

 

I have enjoyed working with extreme magnetic fields and the nuclear relativistic Fermi Liquids that  may describe the liquid phases at very high densities. Magnetized nuclear matter and its main physical magnitudes may  be described by the relativistic/nonrelativistic Landau Parameters.

In past years,  much of my research has been associated with the theoretical descritption of behavior of nuclear matter and equations of state (EOS).  I have worked on one-meson potentials including effects of finite temperature and density  to size the in-medium contributions to the nucleon-nucleon interaction.

Other research topics on which I am interested are:

  • Astrophysical aspects of dark matter
  • Very intense electromagnetic fields, non-linear field theories
  • Exotic states in dense matter (nuclearites)
  • Nucleon and Quark matter properties
  • Extreme conditions in compact stars

In memoriam of JM Pérez, J.M. López, M. Macfarlane, B. D. Serot

 

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