Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Can magnetic fields stabilize or destabilize twin stars?   Sharp phase transitions described by stiff equations of state allow for the
existence of a third family of stable compact stars (besides white dwarfs and
neutron stars), twin stars. In this work, we investigate for the first time the
role of strong magnetic fields on non-magnetic twin stars sequences and the
case in which magnetic fields themselves give rise to a third family of stable
stars. We use three sets of equations of state to study such effects from a
more general point of view: the Quark-Hadron Chiral Parity-Doublet (Q$\chi$P)
model for both hadronic and quark phases, and the Many-Body Forces (MBF) model
connected to either the MIT Bag model with vector interaction (MIT) or to the
Constant-Sound-Speed (CSS) approximation for the quark phase, through a Maxwell
construction. Magnetic field effects are introduced in the structure of stars
through the solution of the Einstein-Maxwell equations, assuming a poloidal
magnetic field configuration and a metric that allows for the description of
deformed stars. We show that strong magnetic fields can destabilize twin star
sequences, with the threshold intensity being model dependent. On the other
hand, magnetic fields can also give rise to twin stars in models that did not
predict these sequences, up to some point when they are again destabilized. In
this sense, magnetic fields can play an important role on the evolution of
neutron stars.

32
The categories of this paper are: atom-ph
18
The categories of this paper are: econ
11
The categories of this paper are: hep-lat
21
The categories of this paper are: adap-org
15
The categories of this paper are: nucl-ex
36
The categories of this paper are: cmp-lg
37
The categories of this paper are: supr-con
34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom
8
The categories of this paper are: hep-ex
23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
0
The categories of this paper are: hep-ph
13
The categories of this paper are: quant-ph
33
The categories of this paper are: plasm-ph
29
The categories of this paper are: funct-an