Finding pulsars with LOFAR
Finding pulsars with LOFAR
复制标题
使用 LOFAR 寻找脉冲星
DOI：
10.1051/0004-6361/200913121
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发表时间：
2007
期刊：
影响因子：
1.6
通讯作者：
B. Stappers
中科院分区：
文献类型：
--
作者：
J. V. Leeuwen;B. Stappers
我们研究了低频射电望远镜LOFAR将发现的脉冲星的数量和类型。我们对银河系、球状星团和银河系以外的星系考虑了不同的搜索策略。我们表明，通过非相干地组合LOFAR站，可以最佳地进行全天星系调查。在为期60天的全银河系巡天中，LOFAR可以发现一千多颗脉冲星，探测当地的脉冲星种群到非常深的亮度极限。对于角尺寸较小的目标，球状星团和星系，LOFAR站可以相干组合，充分利用灵敏度。对邻近的北天球状星团的搜索可以发现大量的低光度毫秒脉冲星(例如。在对M15的10小时观测中发现了10多颗新的毫秒脉冲星)。如果附近星系的脉冲星数量与银河系相似，10小时的观测可以在M33中找到10颗最亮的脉冲星，或者在距离为1.2 Mpc的其他星系中找到脉冲星。
We investigate the number and type of pulsars that will be discovered with the low‐frequency radio telescope LOFAR. We consider different search strategies for the Galaxy, for globular clusters and for galaxies other than our own. We show an all‐sky Galactic survey can be optimally carried out by incoherently combining the LOFAR stations. In a 60‐day all‐sky Galactic survey LOFAR can find over a thousand pulsars, probing the local pulsar population to a very deep luminosity limit. For targets of smaller angular size, globular clusters and galaxies, the LOFAR stations can be combined coherently, making use of the full sensitivity. Searches of nearby northern‐sky globular clusters can find large numbers of low luminosity millisecond pulsars (eg. over 10 new millisecond pulsars in a 10‐hour observation of M15). If the pulsar population in nearby galaxies is similar to that of the Milky Way, a 10‐hour observation can find the 10 brightest pulsars in M33, or pulsars in other galaxies out to a distance of 1.2 Mpc.