中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 国家天文台
  3. 中国科学院国家天文台
The NANOGrav 11-year Data Set: Pulse Profile Variability

文献类型：期刊论文

作者Brook, P. R.2,3; Karastergiou, A.4,5,6; McLaughlin, M. A.2,3; Lam, M. T.2,3; Arzoumanian, Z.7; Chatterjee, S.8,9; Cordes, J. M.8,9; Crowter, K.10; DeCesar, M.11; Demorest, P. B.12
刊名ASTROPHYSICAL JOURNAL
出版日期2018-12-01
卷号868期号:2页码:28
关键词ISM: general pulsars: general pulsars: individual (J1643-1224, J1713+0747, B1937+21, J2145-0750) stars: neutron
ISSN号0004-637X
DOI10.3847/1538-4357/aae9e3
英文摘要Access to 50 years of data has led to the discovery of pulsar emission and rotation variability on timescales of months and years. Most of this long-term variability has been seen in long-period pulsars, with relatively little focus on recycled millisecond pulsars. We have analyzed a 38-pulsar subset of the 45 millisecond pulsars in the NANOGrav 11-year data set, in order to review their pulse profile stability. The most variability, on any timescale, is seen in PSRs J1713+0747, B1937+21, and J2145-0750. The strongest evidence for long-timescale pulse profile changes is seen in PSRs B1937+21 and J1643-1224. We have focused our analyses on these four pulsars in an attempt to elucidate the causes of their profile variability. Effects of scintillation seem to be responsible for the profile modifications of PSR J2145-0750. We see evidence that imperfect polarization calibration contributes to the profile variability of PSRs J1713+0747 and B1937+21, along with radio frequency interference around 2 GHz, but find that propagation effects also have an influence. The changes seen in PSR J1643-1224 have been reported previously, yet elude explanation beyond their astrophysical nature. Regardless of cause, unmodeled pulse profile changes are detrimental to the accuracy of pulsar timing and must be incorporated into the timing models where possible.
WOS关键词RADIO ASTRONOMICAL POLARIMETRY ; INTERSTELLAR SCINTILLATION ; TIMING OBSERVATIONS ; PRECISION ; EMISSION ; PRECESSION ; DISPERSION ; STABILITY ; EVENT
资助项目NSF Physics Frontiers Center[PHYS-1430284] ; NSF[AST-11000968] ; NSERC ; Canadian Institute for Advanced Research ; NASA[PF4-150120] ; CAS Pioneer Hundred Talents Program ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB23000000] ; Track I award[OIA-1458952]
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:000451744500003
出版者IOP PUBLISHING LTD
资助机构NSF Physics Frontiers Center ; NSF Physics Frontiers Center ; NSF ; NSF ; NSERC ; NSERC ; Canadian Institute for Advanced Research ; Canadian Institute for Advanced Research ; NASA ; NASA ; CAS Pioneer Hundred Talents Program ; CAS Pioneer Hundred Talents Program ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Track I award ; Track I award ; NSF Physics Frontiers Center ; NSF Physics Frontiers Center ; NSF ; NSF ; NSERC ; NSERC ; Canadian Institute for Advanced Research ; Canadian Institute for Advanced Research ; NASA ; NASA ; CAS Pioneer Hundred Talents Program ; CAS Pioneer Hundred Talents Program ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Track I award ; Track I award ; NSF Physics Frontiers Center ; NSF Physics Frontiers Center ; NSF ; NSF ; NSERC ; NSERC ; Canadian Institute for Advanced Research ; Canadian Institute for Advanced Research ; NASA ; NASA ; CAS Pioneer Hundred Talents Program ; CAS Pioneer Hundred Talents Program ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Track I award ; Track I award ; NSF Physics Frontiers Center ; NSF Physics Frontiers Center ; NSF ; NSF ; NSERC ; NSERC ; Canadian Institute for Advanced Research ; Canadian Institute for Advanced Research ; NASA ; NASA ; CAS Pioneer Hundred Talents Program ; CAS Pioneer Hundred Talents Program ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Track I award ; Track I award
源URL[http://ir.bao.ac.cn/handle/114a11/23900]  
专题中国科学院国家天文台
通讯作者Brook, P. R.
作者单位1.Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany
2.West Virginia Univ, Dept Phys & Astron, Morgantown, WV 26506 USA
3.West Virginia Univ, Ctr Gravitat Waves & Cosmol, Chestnut Ridge Res Bldg, Morgantown, WV 26505 USA
4.Univ Oxford, Astrophys, Denys Wilkinson Bldg,Keble Rd, Oxford OX1 3RH, England
5.Univ Western Cape, Dept Phys, ZA-7535 Cape Town, South Africa
6.Rhodes Univ, Dept Phys & Elect, POB 94, ZA-6140 Grahamstown, South Africa
7.NASA, Goddard Space Flight Ctr, Xray Astrophys Lab, Code 662, Greenbelt, MD 20771 USA
8.Cornell Univ, Dept Astron, Ithaca, NY 14853 USA
9.Cornell Univ, Cornell Ctr Astrophys & Planetary Sci, Ithaca, NY 14853 USA
10.Univ British Columbia, Dept Phys & Astron, 6224 Agr Rd, Vancouver, BC V6T 1Z1, Canada
推荐引用方式
GB/T 7714		 Brook, P. R.,Karastergiou, A.,McLaughlin, M. A.,et al. The NANOGrav 11-year Data Set: Pulse Profile Variability[J]. ASTROPHYSICAL JOURNAL,2018,868(2):28.
APA Brook, P. R..,Karastergiou, A..,McLaughlin, M. A..,Lam, M. T..,Arzoumanian, Z..,...&Zhu, W. W..(2018).The NANOGrav 11-year Data Set: Pulse Profile Variability.ASTROPHYSICAL JOURNAL,868(2),28.
MLA Brook, P. R.,et al."The NANOGrav 11-year Data Set: Pulse Profile Variability".ASTROPHYSICAL JOURNAL 868.2(2018):28.

入库方式： OAI收割

来源：国家天文台

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。