A millisecond pulsar in a stellar triple system
A millisecond pulsar in a stellar triple system
复制标题
DOI：
10.1038/nature12917
复制
发表时间：
2014-01
期刊：
影响因子：
64.8
通讯作者：
S. Ransom;I. Stairs;A. Archibald;J. Hessels;D. Kaplan;M. Kerkwijk;J. Boyles;A. Deller;S. Chatterjee;A. Schechtman-Rook;A. Berndsen;R. Lynch;D. Lorimer;C. Karako-Argaman;V. Kaspi;V. Kondratiev;M. Mclaughlin;J. V. Leeuwen;R. Rosen;M. Roberts;K. S. Nrao;U. Columbia;Astron;U. McGill;U. Amsterdam;U. Wisconsin-Milwaukee;U. Wisconsin-Madison;U. Toronto;U. WestVirginia;U. WesternKentucky;U. Cornell;Lebedev Physical Inst.;Eureka Scientific;N. Y. U. A. Dhabi;U. T. A. Brownsville;U. N. Mexico
中科院分区：
文献类型：
--
作者：
S. Ransom;I. Stairs;A. Archibald;J. Hessels;D. Kaplan;M. Kerkwijk;J. Boyles;A. Deller;S. Chatterjee;A. Schechtman-Rook;A. Berndsen;R. Lynch;D. Lorimer;C. Karako-Argaman;V. Kaspi;V. Kondratiev;M. Mclaughlin;J. V. Leeuwen;R. Rosen;M. Roberts;K. S. Nrao;U. Columbia;Astron;U. McGill;U. Amsterdam;U. Wisconsin-Milwaukee;U. Wisconsin-Madison;U. Toronto;U. WestVirginia;U. WesternKentucky;U. Cornell;Lebedev Physical Inst.;Eureka Scientific;N. Y. U. A. Dhabi;U. T. A. Brownsville;U. N. Mexico
引力束缚的三体系统已经被研究了几百年，在我们的银河系中很常见。它们显示了复杂的轨道相互作用，如果有足够精确的测量，这些相互作用可以限制天体的组成、质量和内部结构，并检验引力理论。一个包含一颗射电脉冲星的三重系统可以提供这样的测量结果，但是之前唯一已知的这样的系统PSR B 1620 -26（参考文献，;有一颗毫秒脉冲星，一颗白色矮星，和一颗行星质量的天体，它们在几十年的轨道上运行）只显示出微弱的相互作用。在这里，我们报告的PSR J 0337 + 1715，一个毫秒脉冲星在一个分层的三重系统与其他两个明星的精确定时和多波长观测。强烈的引力相互作用是明显的，并提供了脉冲星的质量（1.4378（13），其中是太阳质量，括号中包含小数点后的不确定性）和两个白色矮伴星的质量（0.19751（15）和0.4101（3）），以及轨道的倾角（都约为39.2°）。出乎意料的共面和近圆形轨道表明一个复杂的和异国情调的进化过去，不同于已知的恒星系统。外部白色矮星的引力场强烈地加速了内部包含中子星星的双星，因此该系统将提供一个理想的实验室来测试广义相对论的强等效原理。
Gravitationally bound three-body systems have been studied for hundreds of years, and are common in our Galaxy,. They show complex orbital interactions, which can constrain the compositions, masses and interior structures of the bodies and test theories of gravity, if sufficiently precise measurements are available. A triple system containing a radio pulsar could provide such measurements, but the only previously known such system, PSR B1620-26 (refs,; with a millisecond pulsar, a white dwarf, and a planetary-mass object in an orbit of several decades), shows only weak interactions. Here we report precision timing and multiwavelength observations of PSR J0337+ 1715, a millisecond pulsar in a hierarchical triple system with two other stars. Strong gravitational interactions are apparent and provide the masses of the pulsar (1.4378 (13), where is the solar mass and the parentheses contain the uncertainty in the final decimal places) and the two white dwarf companions (0.19751 (15) and 0.4101 (3)), as well as the inclinations of the orbits (both about 39.2°). The unexpectedly coplanar and nearly circular orbits indicate a complex and exotic evolutionary past that differs from those of known stellar systems. The gravitational field of the outer white dwarf strongly accelerates the inner binary containing the neutron star, and the system will thus provide an ideal laboratory in which to test the strong equivalence principle of general relativity.