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
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Accepted for publication in ApJ; 14 pages, 5 figures, 6 tables
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.
The Parkes multibeam pulsar survey: VII. Timing of four millisecond pulsars and the underlying spin period distribution of the Galactic millisecond pulsar population
Temporal Variations in Pulsar Spectro-Polarimetry: Findings from millisecond pulsar J2144-5237 using Parkes UWL receiver
National Centre for Radio Astrophysics, NCRA-TIFR(国家射电天文中心,NCRA-TIFR);CSIRO Space and Astronomy(CSIRO空间与天文学部);Jodrell Bank Centre for Astrophysics, Department of Physics and Astronomy, The University of Manchester(曼彻斯特大学物理与天文学系乔德雷克银行天体物理学中心)
Discovery of Millisecond Pulsars toward the Galactic Bulge in an Image-based Survey with MeerKAT
Max Planck Institute for Gravitational Physics (Albert Einstein Institute)(马克斯·普朗克引力物理研究所(爱因斯坦研究所));Leibniz Universität Hannover(汉诺威莱布尼茨大学);Center for Gravitation, Cosmology, and Astrophysics, Department of Physics and Astronomy, University of Wisconsin-Milwaukee(威斯康星大学密尔沃基分校物理与天文学系引力、宇宙学与天体物理中心);Department of Physics and Astronomy, University of North Carolina at Chapel Hill(北卡罗来纳大学教堂山分校物理与天文学系);National Radio Astronomy Observatory(国家射电天文台);Department of Engineering and Physics, Sweet Briar College(斯威特布莱尔学院工程与物理系);U.S. Naval Research Laboratory(美国海军研究实验室)
Discovery of Millisecond Pulsars in the Globular Cluster Omega Centauri
半人马座球状星团是银河系中质量最大、亮度最高的星团。$γ$射线源FL8 Y J1326.7 $-$ 4729与星团的核心重合,这导致人们猜测星团核心可能存在迄今未知的射电暴或湮灭性暗物质。在这里,我们报告发现五毫秒半人马座欧米茄以下的观测与帕克斯射电望远镜。其中四颗星的自转周期分别为4.1、4.2、4.6和6.8毫秒,第五颗星的自转周期为4.8毫秒,属于食双星系统,轨道周期为2.1小时。澳大利亚望远镜紧凑阵列拍摄的星团中心的深射电连续图像显示了一小部分紧凑的射电源,这使得其他的射电星可能正在等待发现。我们认为,毫秒级双星极有可能是$γ$射线的发射源。这些恒星的长期定时为探索星团的动力学和星际介质提供了机会。
Frequency- and phase-resolved polarimetry of millisecond pulsars and its application to timing
Monash University(莫纳什大学);OzGrav: The ARC Centre of Excellence for Gravitational Wave Discovery(ARC引力波发现卓越中心);Australia Telescope National Facility, CSIRO(澳大利亚国家望远镜设施,CSIRO);Xinjiang Astronomical Observatory, Chinese Academy of Sciences(中国科学院新疆天文台);Max Planck Institute for Gravitational Physics (Albert Einstein Institute)(马克斯·普朗克引力物理学研究所(爱因斯坦研究所));Leibniz Universität Hannover(汉诺威莱布尼茨大学);Hunan Normal University(湖南师范大学)
The High Time Resolution Universe Pulsar Survey - VII: discovery of five millisecond pulsars and the different luminosity properties of binary and isolated recycled pulsars
Discovery of Two Consecutive Profile Change Events in the Millisecond Pulsar PSR J0437-4715
Macquarie University(麦考瑞大学);Australia Telescope National Facility, CSIRO(澳大利亚望远镜国家设施,CSIRO);OzGrav: The ARC Center of Excellence for Gravitational Wave Discovery(OzGrav:ARC引力波发现卓越中心);Xinjiang Astronomical Observatory, Chinese Academy of Sciences(中国科学院新疆天文台);School of Physics and Astronomy, Monash University(蒙纳士大学物理与天文学学院)
The SUrvey for Pulsars and Extragalactic Radio Bursts II: New FRB discoveries and their follow-up
我们报告了在帕克斯射电望远镜正在进行的脉冲星和河外射电暴(SUPERB)调查中发现的四个快速射电暴(FRB):FRB 150610,151206,151230和160102。我们的实时发现使我们能够在12个对无线电,光学,X射线,伽马射线光子和中微子敏感的主要设施中进行广泛,快速的多信使跟踪,时间范围从爆发后一小时到几个月不等。没有对应的FRB被发现,我们提供了余辉光度的上限。没有发现FRB重复。所有FRB的正式拟合显示出散射的迹象,而它们的固有宽度在时间上是无法解决的。FRB 151206位于银河系低纬度,FRB 151230显示出尖锐的光谱截止,FRB 160102具有迄今为止探测到的最高色散测量值(DM = $2596.1\pm0.3$ pc cm $^{-3}$)。其中三个FRB具有高色散测量值(DM > $1500$ pc cm $^{-3}$),这有利于DM主要由星系际介质贡献的情况。Parkes FRB源计数分布与通量$>2$ Jymes的斜率为$α=-2.2^{+0.6}_{-1.2}$,并且仍然与欧几里德分布($α=-3/2$)一致。我们还发现,全天速率是$1.7^{+1.5}_{-0.9}\times10^3$ FRB/($4π$ sr)/天以上的$\sim2$ Jyms和目前没有强有力的证据,一个纬度依赖的FRB天空速率。
Discovery and Timing of the First Millisecond Pulsar in NGC 6316
University of Virginia(弗吉尼亚大学);National Radio Astronomy Observatory(国家射电天文台);George Mason University(乔治梅森大学);Australia Telescope National Facility, CSIRO(CSIRO澳大利亚望远镜国家设施);Western Sydney University(西悉尼大学)
Super-Massive Neutron Stars and Compact Binary Millisecond Pulsars
中子星的最大质量在多个研究领域都有重要意义,包括天体物理学、核物理学和引力波天文学。紧凑的毫秒双星(轨道周期小于一天)是一个快速增长的脉冲星群体,为寻找最大质量的中子星提供了一个很好的机会。应用一种新的方法来测量伴星两侧的速度,我们之前发现紧凑的毫秒脉冲双星PSR J2215+5135拥有迄今为止已知的最大质量的中子星之一,质量为2.27 $\pm$ 0.16 M $_\odot$(Linares,Shahbaz & Casares,2018)。我们重新审视的0.33 M $_\odot$伴星,脉冲星加热的属性,并认为,在这个“红背”二进制的辐射是极端的,但稳定的,对称的,不一定产生的扩展源。我们也回顾了中子星的质量分布,根据这一点和最近的发现。我们编制了一份清单,列出了所有(九个)系统与超大质量中子星的证据,质量超过2 M $_\odot$。我们发现其中四个是紧凑的二进制毫秒序列(一个黑寡妇,两个红背和一个红背候选人)。这表明紧凑的毫秒双星是限制中子星最大质量的关键。
Discovery of two new millisecond pulsars towards the Galactic bulge
NASA Goddard Space Flight Center(美国宇航局戈达德太空飞行中心);University of Maryland(马里兰大学);LAPTh, CNRS, USMB(拉普特实验室,法国国家科学研究中心,萨瓦大学);Université Grenoble Alpes, CNRS, IPAG(格勒诺布尔阿尔卑斯大学,法国国家科学研究中心,天体物理学与行星学研究所);Australia Telescope National Facility, CSIRO, Space and Astronomy(澳大利亚望远镜国家设施,CSIRO空间与天文部门);Western Sydney University(西悉尼大学);George Mason University(乔治梅森大学);Naval Research Laboratory(海军研究实验室);Department of Engineering and Physics, Sweet Briar College(斯威特布莱尔学院工程与物理系);National Radio Astronomy Observatory(美国国家射电天文台);Fakultät für Physik, Universität Bielefeld(比勒费尔德大学物理学院);INAF – Osservatorio Astronomico di Cagliari(意大利国家天体物理研究所卡利亚里天文台);Max-Planck-Institut für Radioastronomie(马克斯·普朗克射电天文研究所);Max Planck Institute for Gravitational Physics (Albert Einstein Institute)(马克斯·普朗克引力物理研究所(阿尔伯特·爱因斯坦研究所));Leibniz Universität Hannover(汉诺威莱布尼茨大学)