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dc.typeArtigo de Periódicopt_BR
dc.titleSignals At Ground Level Of Relativistic Solar Particles Associated With A Radiation Storm On 2014 April 18pt_BR
dc.contributor.authorC; Naviapt_BR
dc.contributor.authorC; de Oliveirapt_BR
dc.contributor.authorMN; Fauthpt_BR
dc.contributor.authorA; Nepomucenopt_BR
dc.contributor.authorApt_BR;;; andrenepomuceno@id.uff.brpt_BR
dc.subjectAstroparticle Physicspt_BR
dc.subjectMethods: Observationalpt_BR
dc.subjectSun: Flarespt_BR
dc.subjectSolar-terrestrial Relationspt_BR
dc.description.abstractActive region NOAA AR2036, located at S20W34 at the Sun disk, produced a moderately strong (GOES class M7.3) flare on 2014 April 18. The flare itself was long in duration, and a halo coronal mass ejection (CME) was emitted. In addition, a radiation storm, that is, solar energetic particles (SEP), began to reach the Earth at 13: 30 UT in the aftermath of the solar blast, meeting the condition of an S1 (minor) radiation storm level. In temporal coincidence with the onset of the S1 radiation storm, the Tupi telescopes located within the South Atlantic Anomaly (SAA) detected a fast rise in the muon counting rate, caused by relativistic protons from this solar blast, with a confidence of up to 3.5% at peak. At the time of the solar blast, of all ground-based detectors, the Tupi telescopes had the best geoeffective location. Indeed, in association with the radiation storm, a gradual increase in the particle intensity was found in some neutron monitors (NMs), all of them in the west region relative to the Sun-Earth line, yet within the geoeffective region. However, their confidence levels are smaller: up to 3%. The fast rising observed at Tupi suggests possible detection of solar particles emitted during the impulsive phase, following by a gradual phase observed also at NMs. Details of these observations, including the expected energy spectrum, are reported.en
dc.relation.ispartofPublications Of The Astronomical Society Of Japanpt_BR
dc.publisherOXFORD UNIV PRESSpt_BR
dc.identifier.citationPublications Of The Astronomical Society Of Japan. OXFORD UNIV PRESS, n. 68, n. 1, p. .pt_BR
dc.description.sponsorshipEuropean Union [213007]pt_BR
dc.description.sponsorshipFundacao de Amparo a Pesquisa do Estado do Rio de Janeiro (FAPERJ) [08458.009577/2011-81, E-26/101.649/2011]pt_BR
dc.description.provenanceMade available in DSpace on 2016-12-06T18:29:31Z (GMT). No. of bitstreams: 0 Previous issue date: 2016. Added 1 bitstream(s) on 2020-09-02T13:46:19Z : No. of bitstreams: 1 000374571300011.pdf: 2186732 bytes, checksum: 88339b51b2ac477563c2dd9d0e443f8d (MD5)en
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