A Second Chromatic Timing Event of Interstellar Origin toward PSR J1713+0747

doi:10.3847/1538-4357/aac770

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	A Second Chromatic Timing Event of Interstellar Origin toward PSR J1713+0747
	Lam, M. T.2,3; Ellis, J. A.2,3; Grillo, G.4; Jones, M. L.2,3; Hazboun, J. S.6,7; Brook, P. R.2,3; Turner, J. E.8; Chatterjee, S.4; Cordes, J. M.4; Lazio, T. J. W.9
刊名	ASTROPHYSICAL JOURNAL
	2018-07-10
卷号	861 期号:2 页码:8
关键词	pulsars: individual (PSR J1713+0747) ISM: general
ISSN号	0004-637X
DOI	10.3847/1538-4357/aac770
英文摘要	The frequency dependence of radio pulse arrival times provides a probe of structures in the intervening media. Demorest et al. was the first to show a short-term (similar to 100-200 days) reduction in the electron content along the line of sight to PSR. J1713+0747 in data from 2008 (approximately MJD 54750) based on an apparent dip in the dispersion measure of the pulsar. We report on a similar event in 2016 (approximately MJD 57510), with average residual pulse-arrival times approximate to-3.0, -1.3, and -0.7 mu s at 820, 1400, and 2300. MHz, respectively. Timing analyses indicate possible departures from the standard v(-2) dispersive-delay dependence. We discuss and rule out a wide variety of potential interpretations. We find the likeliest scenario to be lensing of the radio emission by some structure in the interstellar medium, which causes multiple frequency-dependent pulse arrival-time delays.
资助项目	NSF Physics Frontiers Center[1430284] ; NSERC Discovery Grant ; Canadian Institute for Advanced Research ; NSF[AST-1100968] ; G. Mendez-Universidad Metropolitana ; Universities Space Research Association ; CAS Pioneer Hundred Talents Program ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB23000000] ; National Aeronautics and Space Administration ; Jet Propulsion Laboratory, California Institute of Technology
WOS关键词	RELATIVISTIC CELESTIAL MECHANICS ; BINARY-SYSTEMS ; RADIO PULSARS ; PRECISION ; SCATTERING ; SCINTILLATION ; VELOCITIES ; LIMITS ; MODEL
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000438684300012
资助机构	NSF Physics Frontiers Center ; NSF Physics Frontiers Center ; NSERC Discovery Grant ; NSERC Discovery Grant ; Canadian Institute for Advanced Research ; Canadian Institute for Advanced Research ; NSF ; NSF ; G. Mendez-Universidad Metropolitana ; G. Mendez-Universidad Metropolitana ; Universities Space Research Association ; Universities Space Research Association ; 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 ; National Aeronautics and Space Administration ; National Aeronautics and Space Administration ; Jet Propulsion Laboratory, California Institute of Technology ; Jet Propulsion Laboratory, California Institute of Technology ; NSF Physics Frontiers Center ; NSF Physics Frontiers Center ; NSERC Discovery Grant ; NSERC Discovery Grant ; Canadian Institute for Advanced Research ; Canadian Institute for Advanced Research ; NSF ; NSF ; G. Mendez-Universidad Metropolitana ; G. Mendez-Universidad Metropolitana ; Universities Space Research Association ; Universities Space Research Association ; 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 ; National Aeronautics and Space Administration ; National Aeronautics and Space Administration ; Jet Propulsion Laboratory, California Institute of Technology ; Jet Propulsion Laboratory, California Institute of Technology ; NSF Physics Frontiers Center ; NSF Physics Frontiers Center ; NSERC Discovery Grant ; NSERC Discovery Grant ; Canadian Institute for Advanced Research ; Canadian Institute for Advanced Research ; NSF ; NSF ; G. Mendez-Universidad Metropolitana ; G. Mendez-Universidad Metropolitana ; Universities Space Research Association ; Universities Space Research Association ; 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 ; National Aeronautics and Space Administration ; National Aeronautics and Space Administration ; Jet Propulsion Laboratory, California Institute of Technology ; Jet Propulsion Laboratory, California Institute of Technology ; NSF Physics Frontiers Center ; NSF Physics Frontiers Center ; NSERC Discovery Grant ; NSERC Discovery Grant ; Canadian Institute for Advanced Research ; Canadian Institute for Advanced Research ; NSF ; NSF ; G. Mendez-Universidad Metropolitana ; G. Mendez-Universidad Metropolitana ; Universities Space Research Association ; Universities Space Research Association ; 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 ; National Aeronautics and Space Administration ; National Aeronautics and Space Administration ; Jet Propulsion Laboratory, California Institute of Technology ; Jet Propulsion Laboratory, California Institute of Technology
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/20864]
专题	中国科学院国家天文台
通讯作者	Lam, M. T.
作者单位	1.Lafayette Coll, Dept Phys, Easton, PA 18042 USA 2.West Virginia Univ, Dept Phys & Astron, POB 6315, Morgantown, WV 26506 USA 3.West Virginia Univ, Ctr Gravitat Waves & Cosmol, Chestnut Ridge Res Bldg, Morgantown, WV 26505 USA 4.Cornell Univ, Dept Astron, Ithaca, NY 14853 USA 5.Max Planck Inst Radio Astron, Hugel 69, D-53121 Bonn, Germany 6.Univ Texas Rio Grande Valley, Ctr Adv Radio Astron, 1 West Univ Dr, Brownsville, TX 78520 USA 7.Univ Washington Bothell, Sch STEM, Div Phys Sci, Box 358500,18115 Campus Way NE, Bothell, WA 98011 USA 8.Univ Wisconsin, Dept Phys, Ctr Gravitat Cosmol & Astrophys, POB 413, Milwaukee, WI 53201 USA 9.CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA 10.NASA, Goddard Space Flight Ctr, Ctr Res & Explorat Space Sci & Technol, Code 662, Greenbelt, MD 20771 USA
推荐引用方式 GB/T 7714	Lam, M. T.,Ellis, J. A.,Grillo, G.,et al. A Second Chromatic Timing Event of Interstellar Origin toward PSR J1713+0747[J]. ASTROPHYSICAL JOURNAL,2018,861(2):8.
APA	Lam, M. T..,Ellis, J. A..,Grillo, G..,Jones, M. L..,Hazboun, J. S..,...&Zhu, W. W..(2018).A Second Chromatic Timing Event of Interstellar Origin toward PSR J1713+0747.ASTROPHYSICAL JOURNAL,861(2),8.
MLA	Lam, M. T.,et al."A Second Chromatic Timing Event of Interstellar Origin toward PSR J1713+0747".ASTROPHYSICAL JOURNAL 861.2(2018):8.