Magnetized hybrid stars: Effects of slow and rapid phase transitions at the quark-hadron interface

We study the influence of strong magnetic fields in hybrid stars, composed by hadrons and a pure quark matter core, and analyse their structure and stability as well as some possible evolution channels due to the magnetic field decay. Using an ad hoc parametrization of the magnetic field strength an...

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Autores principales: Mariani, Mauro, Orsaria, Milva Gabriela, Ranea Sandoval, Ignacio Francisco, Lugones, Germán
Formato: Articulo
Lenguaje:Inglés
Publicado: 2019
Materias:
Ciencias Astronómicas
Dense matter
equation of state
stars: magnetars
stars: neutron
stars: oscillations
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/126594
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-126594
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
Dense matter
equation of state
stars: magnetars
stars: neutron
stars: oscillations
spellingShingle Ciencias Astronómicas
Dense matter
equation of state
stars: magnetars
stars: neutron
stars: oscillations
Mariani, Mauro
Orsaria, Milva Gabriela
Ranea Sandoval, Ignacio Francisco
Lugones, Germán
Magnetized hybrid stars: Effects of slow and rapid phase transitions at the quark-hadron interface
topic_facet Ciencias Astronómicas
Dense matter
equation of state
stars: magnetars
stars: neutron
stars: oscillations
description We study the influence of strong magnetic fields in hybrid stars, composed by hadrons and a pure quark matter core, and analyse their structure and stability as well as some possible evolution channels due to the magnetic field decay. Using an ad hoc parametrization of the magnetic field strength and taking into account Landau-quantization effects in matter, we calculate hybrid magnetized equations of state and some associated quantities, such as particle abundances and matter magnetization, for different sets of parameters and different magnetic field strengths. Moreover, we compute the magnetized stable stellar configurations, the mass versus radius and the gravitational mass versus central energy density relationships, the gravitational mass versus baryon mass diagram, and the tidal deformability. Our results are in agreement with both, the∼ 2 M¯ pulsars and the data obtained from GW170817. In addition, we study the stability of stellar configurations assuming that slow and rapid phase transitions occur at the sharp hadron–quark interface. We find that, unlike in the rapid transition scenario, where ∂M/∂²c < 0 is a sufficient condition for instability, in the slow transition scenario there exists a connected extended stable branch beyond the maximum mass star, for which ∂M/∂²c < 0. Finally, analysing the gravitational mass versus baryon mass relationship, we have calculated the energy released in transitions between stable stellar configurations. We find that the inclusion of the magnetic field and the existence of new stable branches allows the possibility of new channels of transitions that fulfil the energy requirements to explain gamma-ray bursts.
format Articulo
Articulo
author Mariani, Mauro
Orsaria, Milva Gabriela
Ranea Sandoval, Ignacio Francisco
Lugones, Germán
author_facet Mariani, Mauro
Orsaria, Milva Gabriela
Ranea Sandoval, Ignacio Francisco
Lugones, Germán
author_sort Mariani, Mauro
title Magnetized hybrid stars: Effects of slow and rapid phase transitions at the quark-hadron interface
title_short Magnetized hybrid stars: Effects of slow and rapid phase transitions at the quark-hadron interface
title_full Magnetized hybrid stars: Effects of slow and rapid phase transitions at the quark-hadron interface
title_fullStr Magnetized hybrid stars: Effects of slow and rapid phase transitions at the quark-hadron interface
title_full_unstemmed Magnetized hybrid stars: Effects of slow and rapid phase transitions at the quark-hadron interface
title_sort magnetized hybrid stars: effects of slow and rapid phase transitions at the quark-hadron interface
publishDate 2019
url http://sedici.unlp.edu.ar/handle/10915/126594
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AT raneasandovalignaciofrancisco magnetizedhybridstarseffectsofslowandrapidphasetransitionsatthequarkhadroninterface
AT lugonesgerman magnetizedhybridstarseffectsofslowandrapidphasetransitionsatthequarkhadroninterface
bdutipo_str Repositorios
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