J/ApJ/710/1111ivo://CDS.VizieR/J/ApJ/710/1111doi:10.26093/cds/vizier.17101111CDSGopalswamy N.Xie H.Makela P.Akiyama S.Yashiro S.Kaiser M.L.,Howard R.A.Bougeret J.-L.2018-02-27T10:36:58Z2012-04-17T12:44:26ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frthe-sunWe report on the radio-emission characteristics of 222 interplanetary (IP) shocks detected by spacecraft at Sun-Earth L1 during solar cycle 23 (1996 to 2006, inclusive). A surprisingly large fraction of the IP shocks (~34%) was radio quiet (RQ; i.e., the shocks lacked type II radio bursts). We examined the properties of coronal mass ejections (CMEs) and soft X-ray flares associated with such RQ shocks and compared them with those of the radio-loud (RL) shocks. The CMEs associated with the RQ shocks were generally slow (average speed ~535km/s) and only ~40% of the CMEs were halos. The corresponding numbers for CMEs associated with RL shocks were 1237km/s and 72%, respectively. Thus, the CME kinetic energy seems to be the deciding factor in the radio-emission properties of shocks.2010ApJ...710.1111Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/710/1111CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/ApJ/709/1238 : Comparison of global model with CMEs (Yeates+, 2010)J/A+AS/119/489 : Solar Type II Radio Bursts, 1990.09 - 1993.12 (Mann+ 1996)J/A+A/304/563 : Cool X-ray flares of Sun with GOES (Phillips+, 1995)J/A+AS/110/99 : White-light flares models (Fang+, 1995)http://wind.nasa.gov/mfi/ : WIND spacecraft Magnetic Field Investigationhttp://www.cfa.harvard.edu/shocks/ : CfA interplanetary shock databasehttp://cdaw.gsfc.nasa.gov/CME_list/ : SOHO LASCO CME catalog onlinehttp://cdaw.gsfc.nasa.gov/CME_list/radio/waves_type2.html : Wind/WAVES typeftp://ftp.ngdc.noaa.gov/STP/SOLAR_DATA/SOLAR_RADIO/SPECTRAL/Type_II/Type_II_1994-2009 : type II burst data available on line at thehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/710/1111https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/710/1111http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/710/1111https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/710/1111https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/710/1111http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/710/1111GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/ApJ/710/1111/table1List of IP shocks observed during solar cycle 23 and their source informationCMEtimeIP CME arrival timetime.epochnullableSF-SizeSolar Flare size in soft X-rays (5)src.morph.scLengthcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIPInterplanetary shock arrival datestime.epochnullableInst[WAS, ] shock observing spacecrafts (Wind, ACE or SOHO)meta.id;instrcharIP-VelInterplanetary shock speedkm/sphys.veloc;arith.ratiofloatMaInterplanetary shock Alfvenic Mach number (M_A_; Eq. 1 and section 3.1)phys.veloc;arith.difffloatr_MaSource of Mach number computation (2)meta.ref;pos.frameintCMEtCoronal Mass Ejection (CME) type (3)meta.code.classcharTstd? IP CME shock standoff distance expressed as arrival time differencehtime;arith.difffloatnullablef_CMEtime[*] Flag indicating CMEtime was the next daymeta.codecharCME-Vel? IP CME shock speedkm/sphys.veloc;arith.ratiointnullableCMECoronal Mass Ejection white-light datesphys.massnullablePA? Coronal Mass Ejection white-light central position angledegpos.posAngintnullablef_PA[H/D]? H: Halo ; D: DG (4)meta.codecharl_CME-WLimit flag on CME-Wmeta.code.errorcharCME-W? Coronal Mass Ejection white-light widthdegphys.angSize;srcintnullableCME-V? Coronal Mass Ejection white-light speedkm/sphys.velocintnullableCME-a? Coronal Mass Ejection white-light accelerationm.s**-2phys.massfloatnullableSF-LocSolar Flare locationmeta.notecharSF-DurSolar Flare duration (hhmm-hhmm)time.intervalcharMC[0/1]? Type II Burst metric type II code (1: metric emission or 0: no metric)meta.codeintnullableIIBtimeType II Burst metric onset timetime.epochnullableDH[0,3]? Type II Burst decameter-hectometric type II code (6)meta.codeintnullableDHtimeType II Burst decameter-hectometric onset timetime.epochnullableNoteComment number(s) (see notes.dat file)meta.notecharJ/ApJ/710/1111/notesNotesNoteCode of notemeta.codeintTextText of notemeta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint