สืบค้นงานวิจัย
Distinct Pattern of Solar Modulation of Galactic Cosmic Rays above a High Geomagnetic Cutoff Rigidity
Mangeard P.-S. - ไม่ระบุหน่วยงาน
ชื่อเรื่อง (EN): Distinct Pattern of Solar Modulation of Galactic Cosmic Rays above a High Geomagnetic Cutoff Rigidity
ผู้แต่ง / หัวหน้าโครงการ (EN): Mangeard P.-S.
บทคัดย่อ (EN): Solar modulation refers to Galactic cosmic-ray variations with the ∼11 yr sunspot cycle and ∼22 yr solar magnetic cycle and is relevant to the space radiation environment and effects on Earth's atmosphere. Its complicated dependence on solar and heliospheric conditions is only roughly understood and has been empirically modeled in terms of a single modulation parameter. Most analyses of solar modulation use neutron monitor (NM) data from locations with relatively low geomagnetic cutoff rigidity, i.e., the threshold for cosmic rays to penetrate Earth's magnetic field. The Princess Sirindhorn Neutron Monitor at Doi Inthanon, Thailand, has the world's highest cutoff rigidity (≈17 GV) where observations span a complete solar modulation cycle (since late 2007). The pattern of solar modulation at Doi Inthanon during 2011-2014 was qualitatively very different from that at a low geomagnetic cutoff and is not well described by the same modulation parameter. At other times, NM count rates from Doi Inthanon and McMurdo, Antarctica (cutoff ∼1 GV), were linearly correlated and confirm the observation from latitude surveys in the previous solar cycle that the slope of the correlation changes with solar magnetic polarity. Low solar magnetic tilt angles (<40° at negative polarity) were well correlated with variations at both NM stations, as predicted by drift models. At a higher tilt angle, the Doi Inthanon count rate is well correlated with the interplanetary magnetic field, which is consistent with an increase in diffusion at high rigidity short-circuiting the effects of drifts and the heliospheric current sheet. © 2018. The American Astronomical Society. All rights reserved..
บทคัดย่อ: ไม่พบข้อมูลจากหน่วยงานต้นทาง
ภาษา (EN): en
เอกสารแนบ (EN): https://www.scopus.com/inward/record.uri?eid=2-s2.0-85047436170&doi=10.3847%2f1538-4357%2faabd3c&partnerID=40&md5=ce1a90148c5b8b3fc34e7406e9043543
เผยแพร่โดย (EN): มหาวิทยาลัยมหิดล
คำสำคัญ (EN): Sun: magnetic fields
เจ้าของลิขสิทธิ์ (EN): มหาวิทยาลัยมหิดล
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Mangeard P.-S.. "Distinct Pattern of Solar Modulation of Galactic Cosmic Rays above a High Geomagnetic Cutoff Rigidity". ไม่ระบุหน่วยงาน. ม.ป.ป.

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Distinct Pattern of Solar Modulation of Galactic Cosmic Rays above a High Geomagnetic Cutoff Rigidity
Mangeard P.-S.
มหาวิทยาลัยมหิดล
ไม่ระบุวันที่เผยแพร่
Latitude survey investigation of galactic cosmic ray solar modulation during 1994-2007 Corotating solar wind structures and recurrent trains of enhanced diurnal variation in galactic cosmic rays Dependence of the neutron monitor count rate and time delay distribution on the rigidity spectrum of primary cosmic rays Fermi-LAT Observations of High-energy Behind-the-limb Solar Flares Colloidal quantum dot ligand engineering for high performance solar cells FERMI-LAT OBSERVATIONS of HIGH-ENERGY γ-RAY EMISSION TOWARD the GALACTIC CENTER Galactic Cosmic-Ray Anistropy during the Forbush Decrease Starting 2013 April 13 Galactic Cosmic-Ray Anisotropy in the Northern Hemisphere from the ARGO-YBJ Experiment during 2008-2012 Cosmic-Ray Diffusion Coefficients throughout the Inner Heliosphere from a Global Solar Wind Simulation Bare Neutron Counter and Neutron Monitor Response to Cosmic Rays During a 1995 Latitude Survey
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