Hybrid stars that masquerade as neutron stars

被引:573
作者
Alford, M
Braby, M
Paris, M
Reddy, S
机构
[1] Washington Univ, Dept Phys, St Louis, MO 63130 USA
[2] Jefferson Natl Lab, Newport News, VA 23606 USA
[3] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA
关键词
dense matter; elementary particles; stars : neutron;
D O I
10.1086/430902
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We show that a hybrid ( nuclear+ quark matter) star can have a mass- radius relationship very similar to that predicted for a star made of purely nucleonic matter. We show this for a generic parameterization of the quark matter equation of state and also for an MIT bag model, each including a phenomenological correction based on gluonic corrections to the equation of state. We obtain hybrid stars as heavy as 2 M(circle dot) for reasonable values of the bag model parameters. For nuclear matter, we use the equation of state calculated by Akmal and coworkers using many- body techniques. Both mixed and homogeneous phases of nuclear and quark matter are considered.
引用
收藏
页码:969 / 978
页数:10
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