NAOC Open IR
Jiamusi pulsar observations III. Nulling of 20 pulsars
Wang, P. F.1,2,3; Han, J. L.1,2,3; Han, L.4,5; Cai, B. Y.4,5; Wang, C.1,2,3; Wang, T.1,3; Chen, X.1,3; Zhou, D. J.1,3; Yu, Y. Z.6; Han, J.1; Xu, J.1,2; Gao, X. Y.1,2,3; Hong, T.1,2; Hou, L. G.1,2; Dong, B.1,2
2020-12-02
Source PublicationASTRONOMY & ASTROPHYSICS
ISSN0004-6361
Volume644Pages:29
AbstractAims. Most pulsar nulling observations have been conducted at frequencies lower than 1400 MHz. We aim to understand the nulling behaviors of pulsars at relatively high frequencies, and to decipher whether or not nulling is caused by a global change in the pulsar magnetosphere.Methods. We used the Jiamusi 66 m telescope to observe 20 bright pulsars at 2250 MHz with unprecedented lengths of time. We estimated the nulling fractions of these pulsars, and identified the null and emission states of the pulses. We also calculated the nulling degrees and scales of the emission-null pairs to describe the distributions of emission and null lengths.Results. Three pulsars, PSRs J0248+6021, J0543+2329, and J1844+00, are found to null for the first time. The details of null-to-emission and emission-to-null transitions within the pulse window are observed for the first time for PSR J1509+5531, which is a low-probability event. A complete cycle of long nulls with timescales of hours is observed for PSR J1709-1640. For most of these pulsars, the K-S tests of nulling degrees and nulling scales reject the hypothesis that null and emission are caused by random processes at high significance levels. Emission-null sequences of some pulsars exhibit quasi-periodic, low-frequency or featureless modulations, which might be related to different origins. During transitions between emission and null states, pulse intensities have diverse tendencies for variation. Significant correlations are found between respectively nulling fraction, nulling cadence, and nulling scale and the energy loss rate of the pulsars. Combined with the nulling fractions reported in the literature for 146 nulling pulsars, we find that statistically large nulling fractions are more tightly related to pulsar period than to characteristic age or energy-loss rate.
Keywordpulsars: general
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of the Chinese Academy of Sciences ; Key Research Program of the Chinese Academy of Sciences ; Open Project Program of the Key Laboratory of FAST, NAOC, Chinese Academy of Sciences ; Open Project Program of the Key Laboratory of FAST, NAOC, Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of the Chinese Academy of Sciences ; Key Research Program of the Chinese Academy of Sciences ; Open Project Program of the Key Laboratory of FAST, NAOC, Chinese Academy of Sciences ; Open Project Program of the Key Laboratory of FAST, NAOC, Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of the Chinese Academy of Sciences ; Key Research Program of the Chinese Academy of Sciences ; Open Project Program of the Key Laboratory of FAST, NAOC, Chinese Academy of Sciences ; Open Project Program of the Key Laboratory of FAST, NAOC, Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of the Chinese Academy of Sciences ; Key Research Program of the Chinese Academy of Sciences ; Open Project Program of the Key Laboratory of FAST, NAOC, Chinese Academy of Sciences ; Open Project Program of the Key Laboratory of FAST, NAOC, Chinese Academy of Sciences
DOI10.1051/0004-6361/202038867
WOS KeywordSUBPULSE MODULATION ; FREQUENCY-DEPENDENCE ; DRIFTING SUBPULSES ; RADIO-EMISSION ; PERIODIC NULLS ; MODE ; LONG ; INTENSITY ; DISCOVERY ; PHASE
Language英语
Funding ProjectNational Natural Science Foundation of China[11988101] ; National Natural Science Foundation of China[11873058] ; Key Research Program of the Chinese Academy of Sciences[QYZDJ-SSW-SLH021] ; Open Project Program of the Key Laboratory of FAST, NAOC, Chinese Academy of Sciences
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of the Chinese Academy of Sciences ; Key Research Program of the Chinese Academy of Sciences ; Open Project Program of the Key Laboratory of FAST, NAOC, Chinese Academy of Sciences ; Open Project Program of the Key Laboratory of FAST, NAOC, Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of the Chinese Academy of Sciences ; Key Research Program of the Chinese Academy of Sciences ; Open Project Program of the Key Laboratory of FAST, NAOC, Chinese Academy of Sciences ; Open Project Program of the Key Laboratory of FAST, NAOC, Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of the Chinese Academy of Sciences ; Key Research Program of the Chinese Academy of Sciences ; Open Project Program of the Key Laboratory of FAST, NAOC, Chinese Academy of Sciences ; Open Project Program of the Key Laboratory of FAST, NAOC, Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of the Chinese Academy of Sciences ; Key Research Program of the Chinese Academy of Sciences ; Open Project Program of the Key Laboratory of FAST, NAOC, Chinese Academy of Sciences ; Open Project Program of the Key Laboratory of FAST, NAOC, Chinese Academy of Sciences
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000596874300005
PublisherEDP SCIENCES S A
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/80519
Collection中国科学院国家天文台
Corresponding AuthorWang, P. F.
Affiliation1.Chinese Acad Sci, Natl Astron Observ, Jia-20 Datun Rd, Beijing 100101, Peoples R China
2.Chinese Acad Sci, NAOC, CAS Key Lab FAST, Beijing 100101, Peoples R China
3.Univ Chinese Acad Sci, Sch Astron, Beijing 100049, Peoples R China
4.State Key Lab Astronaut Dynam, Xian 710043, Shaanxi, Peoples R China
5.China Xian Satellite Control Ctr, Jiamusi Deep Space Stn, Jiamusi 154002, Heilongjiang, Peoples R China
6.Qiannan Normal Univ Nationalities, Duyun 558000, Guizhou, Peoples R China
Recommended Citation
GB/T 7714
Wang, P. F.,Han, J. L.,Han, L.,et al. Jiamusi pulsar observations III. Nulling of 20 pulsars[J]. ASTRONOMY & ASTROPHYSICS,2020,644:29.
APA Wang, P. F..,Han, J. L..,Han, L..,Cai, B. Y..,Wang, C..,...&Dong, B..(2020).Jiamusi pulsar observations III. Nulling of 20 pulsars.ASTRONOMY & ASTROPHYSICS,644,29.
MLA Wang, P. F.,et al."Jiamusi pulsar observations III. Nulling of 20 pulsars".ASTRONOMY & ASTROPHYSICS 644(2020):29.
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