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arXiv 1507.04451astro-ph.HEastro-ph.SR
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费米gamma-ray源的帕克斯射电搜索和毫秒脉冲星的发现

Parkes radio searches of Fermi gamma-ray sources and millisecond pulsar discoveries

F. Camilo, M. Kerr, P. S. Ray, S. M. Ransom, J. Sarkissian, H. T. Cromartie, S. Johnston, J. E. Reynolds, M. T. Wolff, P. C. C. Freire, B. Bhattacharyya, E. C. … 展开作者

F. Camilo, M. Kerr, P. S. Ray, S. M. Ransom, J. Sarkissian, H. T. Cromartie, S. Johnston, J. E. Reynolds, M. T. Wolff, P. C. C. Freire, B. Bhattacharyya, E. C. Ferrara, M. Keith, P. F. Michelson, P. M. Saz Parkinson, K. S. Wood

摘要:

在用帕克斯射电望远镜搜索56个未识别的费米-LAT伽马射线源时,我们探测到了11个毫秒射电星(MSP),其中10个是新发现的,其中5个在Kerr等人(2012)中报道。我们没有探测到来自另外六个已知的射电源的射电脉动。我们描述了完成的调查,其中包括许多目标的多个观测,以尽量减少星际闪烁的影响,在双星系统中的加速效应,和日食。我们认为剩下的39个源中有23个可能仍然是可行的脉冲星候选者。我们提出了五个MSP的定时解决方案和偏振测量,以及PSR J1903-7051的伽马射线脉动(其他五个的脉动在第二个费米-LAT伽马射线天体目录中报告)。两个新的MSP是孤立的,五个是在>1 d的圆形轨道与0.2-0.3 Msun假定的白矮星的同伴。PSR J 0955 -6150在一个24 d的轨道上,伴星为0.25 Msun,但偏心率为0.11,属于最近发现的一类偏心MSP。PSR J1036-8317是一颗8小时联星,伴星大于0.14兆太阳,可能是一颗白矮星。PSR J1946-5403在一个3小时的轨道上,有一个大于0.02 Msun的伴星,没有射电食的证据。

英文摘要:

In a search with the Parkes radio telescope of 56 unidentified Fermi-LAT gamma-ray sources, we have detected 11 millisecond pulsars (MSPs), 10 of them discoveries, of which five were reported in Kerr et al. (2012). We did not detect radio pulsations from another six pulsars now known in these sources. We describe the completed survey, which included multiple observations of many targets done to minimize the impact of interstellar scintillation, acceleration effects in binary systems, and eclipses. We consider that 23 of the 39 remaining sources may still be viable pulsar candidates. We present timing solutions and polarimetry for five of the MSPs, and gamma-ray pulsations for PSR J1903-7051 (pulsations for five others were reported in the second Fermi-LAT catalog of gamma-ray pulsars). Two of the new MSPs are isolated and five are in >1 d circular orbits with 0.2-0.3 Msun presumed white dwarf companions. PSR J0955-6150, in a 24 d orbit with a ~0.25 Msun companion but eccentricity of 0.11, belongs to a recently identified class of eccentric MSPs. PSR J1036-8317 is in an 8 hr binary with a >0.14 Msun companion that is probably a white dwarf. PSR J1946-5403 is in a 3 hr orbit with a >0.02 Msun companion with no evidence of radio eclipses.

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