Multifrequency Study of Giant Radio Pulses from the Crab Pulsar with the K5 VLBI Recording Terminal

Publications of the Astronomical Society of Japan

Soglasnov, Vladimir⁴  Bilous, Anna⁵  Oreshko, Vasily²  Sekido, Mamoru¹  Moshkina, Olga⁵  Kondo, Tetsuro¹  Popov, Mikhail⁴  Ilyasov, Yury²  Kondratiev, Vladislav³ 

[1] Kashima Space Research Center, National Institute of Information and Communications Technology, 893-1, Hirai, Kashima, Ibaraki 314-8501 ,;Puschino Radio Astronomical Observatory, Astro Space Center, Lebedev Physical Institute, Pushchino, Moscow Reg., 142292, Russia ,;Astro Space Center of Lebedev Physical Institute, Leninsky Prospect 53, Moscow 117924, Russia , West Virginia University, Department of Physics, Morgantown, WV 26506-6315, USANational Radio Astronomy Observatory, 520 Edgemont Road, Charlottesville, VA 22903-2475, USA;Astro Space Center of Lebedev Physical Institute, Leninsky Prospect 53, Moscow 117924, Russia ,;Astro Space Center of Lebedev Physical Institute, Leninsky Prospect 53, Moscow 117924, Russia , Moscow Institute of Physics and Technology, 141700, 9, Institutskii per., Dolgoprudny, Moscow, Russia ,

关键词: Pulsars;    "giant pulses;    Crab pulsar;    PSR B0531+21";    "e-VLBI terminal K5";   

DOI  :  10.1093/pasj/61.6.1197

学科分类：天文学(综合)

来源: Oxford University Press

【 摘 要 】

SimultaneousmultifrequencyobservationsofCrabpulsargiantpulses(GPs)wereperformedwiththe64-mKalyazinradiotelescopeatfourfrequency($$u$$$$=$$0.6,1.4,2.2,and8.3GHz)usingtheK5VLBIrecordingterminal.TheK5terminalprovidedcontinuousrecordingin16$$imes$$4-MHzwidefrequencychannelsdistributedover4frequencybands.SeveralthousandGPsweredetectedduringabout6hoursofobservationsontwosuccessivedaysin2005July.TheradiospectraofsingleGPswereanalyzedatseparatefrequenciesandoverthewholefrequencyrange.Thesespectramanifestnotablemodulationoverthefrequencyranges,$$Deltau$$,bothonlarge($$Deltau/u$$$$approx$$0.5)andsmall($$Deltau/$$$$u$$$$approx$$0.01)frequencyscales.Across-correlationanalysisofGPsat2.2GHzshowedthattheirpulseshapescanbeinterpretedasbeinganensembleofunresolvedburstsgroupedtogetherontimescalesof$$approx$$1$$mu$$s,beingwell-correlatedovera60-MHzband.ThecorrespondingGPcross-correlationfunctionsdonotobeythepredictionsoftheamplitude-modulatednoisemodelofRickett(1975),thusindicatingthatunresolvedcomponentsrepresentasmallnumberofelementaryemitters.

【 授权许可】

Unknown