Unusual emission variations near the eclipse of black widow pulsar PSR J1720-0533

S. Q. Wang; J. B. Wang; N. Wang; J. M. Yao; G. Hobbs; S. Dai; F. F. Kou; C. C. Miao; D. Li; Y. Feng; S .J. Dang; D. H. Wang; P. Wang; J. P. Yuan; C. M. Zhang; L. Zhang; S. B. Zhang; W. W. Zhu

doi:10.3847/2041-8213/ac365c

Unusual emission variations near the eclipse of black widow pulsar PSR J1720-0533

S. Q. Wang, J. B. Wang, N. Wang, J. M. Yao, G. Hobbs, S. Dai, F. F. Kou, C. C. Miao, D. Li, Y. Feng, S .J. Dang, D. H. Wang, P. Wang, J. P. Yuan, C. M. Zhang, L. Zhang, S. B. Zhang, W. W. Zhu

Western Sydney University

Research output: Contribution to journal › Article › peer-review

Abstract

We report on an unusually bright observation of PSR J1720-0533 using the Five-hundred-meter Aperture Spherical radio Telescope (FAST). The pulsar is in a black widow system that was discovered by the Commensal Radio Astronomy FAST Survey (CRAFTS). By coincidence, a bright scintillation maximum was simultaneous with the eclipse in our observation, which allowed for precise measurements of flux density variations, as well as dispersion measure (DM) and polarization. We found that there are quasi-periodic pulse emission variations with a modulation period of ∼22 s during the ingress of the eclipse, which could be caused by plasma lensing. No such periodic modulation was found during the egress of the eclipse. The linear polarization of the pulsar disappears before the eclipse, even before there is a visually obvious change in DM. We also found that the pulse scattering may play an important role in the eclipse of PSR J1720-0533.

Original language	English
Article number	L13
Number of pages	6
Journal	Astrophysical Journal Letters
Volume	922
Issue number	1
DOIs	https://doi.org/10.3847/2041-8213/ac365c
Publication status	Published - 2021

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Wang, S. Q., Wang, J. B., Wang, N., Yao, J. M., Hobbs, G., Dai, S., Kou, F. F., Miao, C. C., Li, D., Feng, Y., Dang, S. . J., Wang, D. H., Wang, P., Yuan, J. P., Zhang, C. M., Zhang, L., Zhang, S. B., & Zhu, W. W. (2021). Unusual emission variations near the eclipse of black widow pulsar PSR J1720-0533. Astrophysical Journal Letters, 922(1), Article L13. https://doi.org/10.3847/2041-8213/ac365c

@article{ddd579fb0e1e458f8fa56abb57b40080,

title = "Unusual emission variations near the eclipse of black widow pulsar PSR J1720-0533",

abstract = "We report on an unusually bright observation of PSR J1720-0533 using the Five-hundred-meter Aperture Spherical radio Telescope (FAST). The pulsar is in a black widow system that was discovered by the Commensal Radio Astronomy FAST Survey (CRAFTS). By coincidence, a bright scintillation maximum was simultaneous with the eclipse in our observation, which allowed for precise measurements of flux density variations, as well as dispersion measure (DM) and polarization. We found that there are quasi-periodic pulse emission variations with a modulation period of ∼22 s during the ingress of the eclipse, which could be caused by plasma lensing. No such periodic modulation was found during the egress of the eclipse. The linear polarization of the pulsar disappears before the eclipse, even before there is a visually obvious change in DM. We also found that the pulse scattering may play an important role in the eclipse of PSR J1720-0533.",

author = "Wang, {S. Q.} and Wang, {J. B.} and N. Wang and Yao, {J. M.} and G. Hobbs and S. Dai and Kou, {F. F.} and Miao, {C. C.} and D. Li and Y. Feng and Dang, {S .J.} and Wang, {D. H.} and P. Wang and Yuan, {J. P.} and Zhang, {C. M.} and L. Zhang and Zhang, {S. B.} and Zhu, {W. W.}",

year = "2021",

doi = "10.3847/2041-8213/ac365c",

language = "English",

volume = "922",

journal = "Astrophysical Journal Letters",

issn = "2041-8205",

publisher = "Institute of Physics Publishing",

number = "1",

}

TY - JOUR

T1 - Unusual emission variations near the eclipse of black widow pulsar PSR J1720-0533

AU - Wang, S. Q.

AU - Wang, J. B.

AU - Wang, N.

AU - Yao, J. M.

AU - Hobbs, G.

AU - Dai, S.

AU - Kou, F. F.

AU - Miao, C. C.

AU - Li, D.

AU - Feng, Y.

AU - Dang, S .J.

AU - Wang, D. H.

AU - Wang, P.

AU - Yuan, J. P.

AU - Zhang, C. M.

AU - Zhang, L.

AU - Zhang, S. B.

AU - Zhu, W. W.

PY - 2021

Y1 - 2021

N2 - We report on an unusually bright observation of PSR J1720-0533 using the Five-hundred-meter Aperture Spherical radio Telescope (FAST). The pulsar is in a black widow system that was discovered by the Commensal Radio Astronomy FAST Survey (CRAFTS). By coincidence, a bright scintillation maximum was simultaneous with the eclipse in our observation, which allowed for precise measurements of flux density variations, as well as dispersion measure (DM) and polarization. We found that there are quasi-periodic pulse emission variations with a modulation period of ∼22 s during the ingress of the eclipse, which could be caused by plasma lensing. No such periodic modulation was found during the egress of the eclipse. The linear polarization of the pulsar disappears before the eclipse, even before there is a visually obvious change in DM. We also found that the pulse scattering may play an important role in the eclipse of PSR J1720-0533.

AB - We report on an unusually bright observation of PSR J1720-0533 using the Five-hundred-meter Aperture Spherical radio Telescope (FAST). The pulsar is in a black widow system that was discovered by the Commensal Radio Astronomy FAST Survey (CRAFTS). By coincidence, a bright scintillation maximum was simultaneous with the eclipse in our observation, which allowed for precise measurements of flux density variations, as well as dispersion measure (DM) and polarization. We found that there are quasi-periodic pulse emission variations with a modulation period of ∼22 s during the ingress of the eclipse, which could be caused by plasma lensing. No such periodic modulation was found during the egress of the eclipse. The linear polarization of the pulsar disappears before the eclipse, even before there is a visually obvious change in DM. We also found that the pulse scattering may play an important role in the eclipse of PSR J1720-0533.

UR - https://hdl.handle.net/1959.7/uws:65291

U2 - 10.3847/2041-8213/ac365c

DO - 10.3847/2041-8213/ac365c

M3 - Article

SN - 2041-8205

VL - 922

JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

IS - 1

M1 - L13

ER -

Unusual emission variations near the eclipse of black widow pulsar PSR J1720-0533

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