Quasi-Radial Modes of Pulsating Neutron Stars: Numerical Results for General-Relativistic Rigidly Rotating Polytropic Models

• 作者: Eleftheria Tzelati Vassilis Geroyannis
• 来源期刊: 天文学与天体物理学国际期刊(英文)
• 学科: 数学
• 关键词: General-Relativistic Polytropic Models Hartle’s Perturbation Method Neutron Stars Quasi-Radial PULSATION MODES Rigid Rotation
• 年，卷（期）: 2014,（3）
• 页码范围: 453-463
• 页数: 11页
• 分类号: O1

摘要

In this paper we compute general-relativistic polytropic models simulating rigidly rotating, pulsating neutron stars. These relativistic compact objects, with a radius of ~10 km and mass between ~1.4 and 3.2 solar masses, are closely related to pulsars. We emphasize on computing the change in the pulsation eigenfrequencies owing to a rigid rotation, which, in turn, is a decisive issue for studying stability of such objects. In our computations, we keep rotational perturbation terms of up to second order in the angular velocity.