Magnetic CFL and Astrophysical Implications

The stability of the color flavor locked phase in the presence of
a strong magnetic field is investigated within the phenomenological MIT bag
model, taking into account the variation of the strange quark mass, the
baryon density, the magnetic fi eld, as well as the bag and gap parameters.
It is found that the minimum value of the energy per baryon in a
color flavor locked state at vanishing pressure is lower than the
corresponding one for unpaired magnetized strange quark matter and, as the
magnetic fi eld increases, the energy per baryon decreases. This implies
that magnetized color flavor locked matter is more stable and could become
the ground state inside neutron stars. The mass-radius relation for such
stars is also studied.