Unusual Emission Variations Near the Eclipse of Black Widow Pulsar PSR J1720-0533

doi:10.3847/2041-8213/ac365c

	Unusual Emission Variations Near the Eclipse of Black Widow Pulsar PSR J1720-0533
	Wang, S. Q.1,2,3,4; Wang, J. B.1,3,4; Wang, N.1,3,4; Yao, J. M.1,3,4; Hobbs, G.5; Dai, S.6; Kou, F. F.1,3,4; Miao, C. C.7; Li, D.7,8; Feng, Y.9
刊名	ASTROPHYSICAL JOURNAL LETTERS
	2021-11-01
卷号	922 期号:1 页码:6
ISSN号	2041-8205
DOI	10.3847/2041-8213/ac365c
通讯作者	Wang, J. B.(wangjingbo@xao.ac.cn)
英文摘要	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 similar to 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.
资助项目	National SKA Program of China[2020SKA0120100] ; National Natural Science Foundation of China[12041304] ; National Natural Science Foundation of China[12041303] ; National Natural Science Foundation of China[12163001] ; National Natural Science Foundation of China[U1938117] ; National Natural Science Foundation of China[U1731238] ; National Key Research and Development Program of China[2017YFA0402600] ; Youth Innovation Promotion Association of Chinese Academy of Sciences ; Xinjiang Uygur Autonomous Region of China for Flexibly Fetching in Upscale Talents, China Postdoctoral Science Foundation[2020M681758] ; Operation, Maintenance and Upgrading Fund for Astronomical Telescopes and Facility Instruments, budgeted from the Ministry of Finance of China (MOF) ; Key Lab of FAST, National Astronomical Observatories, Chinese Academy of Sciences ; Guizhou Provincial Science and Technology Foundation[[2020]1Y016]
WOS关键词	MILLISECOND PULSAR ; BINARY
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	IOP Publishing Ltd
WOS记录号	WOS:000720089600001
资助机构	National SKA Program of China ; National Natural Science Foundation of China ; National Key Research and Development Program of China ; Youth Innovation Promotion Association of Chinese Academy of Sciences ; Xinjiang Uygur Autonomous Region of China for Flexibly Fetching in Upscale Talents, China Postdoctoral Science Foundation ; Operation, Maintenance and Upgrading Fund for Astronomical Telescopes and Facility Instruments, budgeted from the Ministry of Finance of China (MOF) ; Key Lab of FAST, National Astronomical Observatories, Chinese Academy of Sciences ; Guizhou Provincial Science and Technology Foundation
内容类型	期刊论文
源URL	[http://ir.xao.ac.cn/handle/45760611-7/4368]
专题	新疆天文台_射电天文研究室
通讯作者	Wang, J. B.
作者单位	1.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Xinjiang, Peoples R China 2.Chinese Acad Sci, NAOC, CAS Key Lab FAST, Beijing 100101, Peoples R China 3.Chinese Acad Sci, Key Lab Radio Astron, Urumqi 830011, Xinjiang, Peoples R China 4.Xinjiang Key Lab Radio Astrophys, Urumqi 830011, Xinjiang, Peoples R China 5.CSIRO Astron & Space Sci, POB 76, Epping, NSW 1710, Australia 6.Western Sydney Univ, Sch Sci, Locked Bag 1797, Penrith, NSW 2751, Australia 7.Chinese Acad Sci, Natl Astron Observ, Beijing 100101, Peoples R China 8.Univ KwaZulu Natal, NAOC UKZN Computat Astrophys Ctr, ZA-4000 Durban, South Africa 9.Zhejiang Lab, Hangzhou 311121, Zhejiang, Peoples R China 10.Guizhou Normal Univ, Sch Phys & Elect Sci, Guiyang 550001, Peoples R China
推荐引用方式 GB/T 7714	Wang, S. Q.,Wang, J. B.,Wang, N.,et al. Unusual Emission Variations Near the Eclipse of Black Widow Pulsar PSR J1720-0533[J]. ASTROPHYSICAL JOURNAL LETTERS,2021,922(1):6.
APA	Wang, S. Q..,Wang, J. B..,Wang, N..,Yao, J. M..,Hobbs, G..,...&Zhu, W. W..(2021).Unusual Emission Variations Near the Eclipse of Black Widow Pulsar PSR J1720-0533.ASTROPHYSICAL JOURNAL LETTERS,922(1),6.
MLA	Wang, S. Q.,et al."Unusual Emission Variations Near the Eclipse of Black Widow Pulsar PSR J1720-0533".ASTROPHYSICAL JOURNAL LETTERS 922.1(2021):6.