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.
中科院分区:
文献类型:
--
作者:
Yap Y. X.;Li K. L.;Kong A. K. H.;Takata J.;Lee J.;Hui C. Y.
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.
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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
影响因子:
4.9
作者:
Cho, Patricia B.;Halpern, Jules P.;Bogdanov, Slavko
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:
--
作者:
J. Takata;K. Cheng;R. Taam
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:
R. Romani;N. Sanchez
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