Face changing companion of the redback millisecond pulsar PSR J1048+2339

Face changing companion of the redback millisecond pulsar PSR J1048+2339
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红背毫秒脉冲星PSR J1048 2339的换脸伴侣

DOI:
10.1051/0004-6361/201834545
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发表时间:
2019-01
影响因子:
6.5
通讯作者:
Hui C. Y.
Hui C. Y.
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Yap Y. X.;Li K. L.;Kong A. K. H.;Takata J.;Lee J.;Hui C. Y.

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我们提出的红背毫秒脉冲星PSR J1048+2339,这是一个4.66毫秒的射电脉冲星在一个紧凑的二进制与轨道周期为6小时的光学观测。我们用鹿林1米望远镜获得了PSR J1048+2339的高质量光变曲线。该系统显示出两个不同的六小时轨道调制,其中椭球调制在不到14天的时间内变成正弦曲线。除了这种变化,伴星的亮度增加了一个星等,这表明后一种调制是由伴星的脉冲星风加热引起的,并且加热在系统中占主导地位。虽然这些变化并不意外,但这样的时间表是类似系统中最短的。我们进行建模分析,以提取系统的属性。我们得到了一个派生的脉冲星质量为2.1 M和0.4 M星星质量的系统。辐射功率增加了6倍,在此期间,脉冲星风加热占主导地位。我们还报告了两个档案钱德拉X射线观测,并讨论了几种可能性,可能会导致不同的加热的同伴。
We present optical observations of the redback millisecond pulsar PSR J1048+2339, which is a 4.66 ms radio pulsar in a compact binary with an orbital period of six hours. We obtained high-quality light curves of PSR J1048+2339 with the Lulin 1 m Telescope. The system shows two distinct six-hour orbital modulations, in which an ellipsoidal modulation changes into a sinusoidal-like profile in less than 14 days. In addition to the change, the brightness of the companion increased by one magnitude, suggesting that the latter type of modulation is caused by the pulsar wind heating of the companion and that the heating became dominant in the system. While the changes are not unexpected, such a timescale is the shortest among similar systems. We performed modeling analysis to extract the properties of the system. We obtained a derived pulsar mass of 2.1 M⊙ and a companion star mass of 0.4 M⊙ for the system. The irradiation power increased by a factor of 6 during which the pulsar wind heating dominates. We also report on the two archival Chandra X-ray observations and discuss several possibilities that might cause the varying heating on the companion.
DOI: 10.3847/1538-4357/aafbaa
发表时间: 2018-12
期刊: The Astrophysical Journal
影响因子: --
作者:
J. Strader;S. Swihart;L. Chomiuk;A. Bahramian;Christopher T. Britt;C. C. Cheung-C.;K. Dage;J. Halpern-J.-H
通讯作者: J. Strader;S. Swihart;L. Chomiuk;A. Bahramian;Christopher T. Britt;C. C. Cheung-C.;K. Dage;J. Halpern-J.-H
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发表时间: 2018-10-10
影响因子: 4.9
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通讯作者: Bogdanov, Slavko
DOI: 10.1088/0004-637x/745/1/100
发表时间: 2011-11
期刊: The Astrophysical Journal
影响因子: --
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通讯作者: J. Takata;K. Cheng;R. Taam
DOI: 10.3847/0004-637x/828/1/7
发表时间: 2016-06
期刊: The Astrophysical Journal
影响因子: --
作者:
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通讯作者: R. Romani;N. Sanchez
DOI: 10.3847/1538-4357/aa7a02
发表时间: 2017-06
期刊: The Astrophysical Journal
影响因子: --
作者:
N. Sanchez;R. Romani
通讯作者: N. Sanchez;R. Romani