论文标题
高度紧凑的Proca星，具有四分之一的自我互动
Highly compact Proca stars with quartic self-interactions
论文作者
论文摘要
我们研究复杂矢量场（称为Proca恒星）的自我磨碎的结合状态，具有新型的四分之一类型的自相互作用，在复杂的标量场或真实矢量场的情况下都不存在。根据耦合常数的迹象，这种四分之一的自我交流可以从先前研究的向量场的自我相互作用中产生proca恒星的独特特征。我们发现自我磨削溶液可以如此紧凑，以至于可以形成光子球。但是，我们还表明，自我相互作用引起了恒星的幽灵不稳定性，这些恒星的紧密度接近，这可能是光子球的形成，这可能使光子球的形成无效。
We study self-gravitating bound states of a complex vector field, known as Proca stars, with a new type of quartic-order self-interaction which does not exist in the case of either a complex scalar field or a real vector field. Depending on the sign of the coupling constant, this quartic self-interaction can yield a distinct feature of Proca stars from the previously investigated self-interaction of the vector field. We find that self-gravitating solutions can be so compact that the photon sphere could form. However, we also show that the self-interaction gives rise to a ghost instability for the stars whose compactness is close that for the formation of a photon sphere, which might invalidate the formation of the photon sphere.
