DISCOVERY OF NINE GAMMA-RAY PULSARS IN FERMI LARGE AREA TELESCOPE DATA USING A NEW BLIND SEARCH METHOD-猫眼课题宝

DOI：

10.1088/0004-637x/744/2/105

发表时间：

2011-11

期刊：

The Astrophysical Journal

影响因子：

通讯作者：

中科院分区：

其他

文献类型：

作者：

H. Pletsch;L. Guillemot;B. Allen;M. Kramer;C. Aulbert;H. Fehrmann;P. Ray;E. Barr;A. Belfiore;F. Camilo;P. Caraveo;O. Celik;D. Champion;M. Dormody;R. Eatough;E. Ferrara;P. Freire;J. Hessels;M. Keith;M. Kerr;A. Luca;A. Lyne;M. Marelli;M. Mclaughlin;D. Parent;S. Ransom;M. Razzano;W. Reich;P. Parkinson;B. Stappers;M. Wolff

我们报告了在对费米大天区望远镜（LAT）的数据进行盲目搜索时发现的9个以前未知的伽马射线天体。这些恒星是用一种新颖的分层搜索方法发现的，这种方法最初是为了探测来自快速旋转的中子星的连续引力波而开发的。该新方法旨在寻找以高达kHz频率旋转的孤立的恒星，计算效率高，并结合了几项进步，包括搜索参数空间（频率，频率导数和天空位置）的基于度量的网格化以及光子概率权重的使用。这九颗恒星的自转频率在3到12赫兹之间，特征年龄从17 kyr到300 r不等。其中两颗，PSR J1803-2149和J2111+ 4606，是年轻而充满活力的银河平面恒星（自旋下降功率超过6 × 1035 erg s-1，年龄低于100 kyr）。剩下的七颗恒星，PSR J 0106 +4855、J 0622 +3749、J1620-4927、J1746-3239、J2028+3332、J2030+4415和J2139+4716，年龄更大，能量更低;其中两颗位于银河系高纬度（|B|> 10°）。PSR J 0106 +4855在所有LAT盲查天体中具有最大的特征年龄（300万年）和最小的表面磁场（2 × 1011 G）。PSR J2139+4716在所有已发现的非循环伽马射线天体中具有最低的自旋下降功率（3 × 1033 erg s−1）。尽管进行了广泛的多频观测，但只有PSR J 0106 +4855在无线电波段有可检测到的脉动。其他八颗星属于不断增加的无线电安静伽马射线星。

We report the discovery of nine previously unknown gamma-ray pulsars in a blind search of data from the Fermi Large Area Telescope (LAT). The pulsars were found with a novel hierarchical search method originally developed for detecting continuous gravitational waves from rapidly rotating neutron stars. Designed to find isolated pulsars spinning at up to kHz frequencies, the new method is computationally efficient and incorporates several advances, including a metric-based gridding of the search parameter space (frequency, frequency derivative, and sky location) and the use of photon probability weights. The nine pulsars have spin frequencies between 3 and 12 Hz, and characteristic ages ranging from 17 kyr to 3 Myr. Two of them, PSRs J1803–2149 and J2111+ 4606, are young and energetic Galactic-plane pulsars (spin-down power above 6 × 1035 erg s−1 and ages below 100 kyr). The seven remaining pulsars, PSRs J0106+4855, J0622+3749, J1620–4927, J1746–3239, J2028+3332, J2030+4415, and J2139+4716, are older and less energetic; two of them are located at higher Galactic latitudes (|b| > 10°). PSR J0106+4855 has the largest characteristic age (3 Myr) and the smallest surface magnetic field (2 × 1011 G) of all LAT blind-search pulsars. PSR J2139+4716 has the lowest spin-down power (3 × 1033 erg s−1) among all non-recycled gamma-ray pulsars ever found. Despite extensive multi-frequency observations, only PSR J0106+4855 has detectable pulsations in the radio band. The other eight pulsars belong to the increasing population of radio-quiet gamma-ray pulsars.

DISCOVERY OF NINE GAMMA-RAY PULSARS IN FERMI LARGE AREA TELESCOPE DATA USING A NEW BLIND SEARCH METHOD

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