DEEP XMM-NEWTON SPECTROSCOPIC AND TIMING OBSERVATIONS OF THE ISOLATED RADIO MILLISECOND PULSAR PSR J0030+0451
DEEP XMM-NEWTON SPECTROSCOPIC AND TIMING OBSERVATIONS OF THE ISOLATED RADIO MILLISECOND PULSAR PSR J0030+0451
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DOI：
10.1088/0004-637x/703/2/1557
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发表时间：
2009-08
期刊：
影响因子：
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通讯作者：
S. Bogdanov;J. Grindlay
中科院分区：
文献类型：
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作者：
S. Bogdanov;J. Grindlay
我们提出了深XMM牛顿欧洲光子成像相机光谱和定时X射线观测附近的孤立射电毫秒脉冲星，PSR J 0030 +0451。它在0.1-10 keV范围内的发射光谱被发现与最近的和研究最好的毫秒脉冲星PSR J 0437 -4715非常相似，主要由热双温模型加上明显高于102 keV的微弱硬尾很好地描述。在0.3-2 keV波段的脉冲发射的特点是两个宽脉冲的脉冲分数为60%-70%，符合主要是热起源的X射线，只有当表面极冠辐射是从轻元素的气氛。热脉冲的建模使我们能够对中子星星半径进行限制，R > 10.7（95%置信度）和R > 10.4 km（99.9%置信度），M = 1.4 M。
We present deep XMM-Newton European Photon Imaging Camera spectroscopic and timing X-ray observations of the nearby solitary radio millisecond pulsar, PSR J0030+0451. Its emission spectrum in the 0.1–10 keV range is found to be remarkably similar to that of the nearest and best-studied millisecond pulsar, PSR J0437–4715, being well described by a predominantly thermal two-temperature model plus a faint hard tail evident above ∼2 keV. The pulsed emission in the 0.3–2 keV band is characterized by two broad pulses with pulsed fraction ∼60%–70%, consistent with a mostly thermal origin of the X-rays only if the surface polar cap radiation is from a light-element atmosphere. Modeling of the thermal pulses permits us to place constraints on the neutron star radius of R > 10.7 (95% confidence) and R > 10.4 km (at 99.9% confidence) for M = 1.4 M☉.