Print Email Facebook Twitter The Sequence of Coronene Hydrogenation Revealed by Gas-phase IR Spectroscopy Title The Sequence of Coronene Hydrogenation Revealed by Gas-phase IR Spectroscopy Author Cazaux, S.M. (TU Delft Astrodynamics & Space Missions; Universiteit Leiden) Arribard, Yann (Rijksuniversiteit Groningen) Egorov, Dmitrii (Rijksuniversiteit Groningen) Palotás, Julianna (Radboud Universiteit Nijmegen) Hoekstra, Ronnie (Rijksuniversiteit Groningen) Berden, Giel (Radboud Universiteit Nijmegen) Oomens, Jos (Radboud Universiteit Nijmegen) Schlathölter, Thomas (Rijksuniversiteit Groningen) Date 2019-04-10 Abstract The solar magnetic field (SMF) has historically been considered as dipole in order to build models of the radially expanding corona, that is, the solar wind in the solar minimum. The simplified approach suggests the existence of only one quasi-stationary current sheet (QCS) of solar origin in the heliosphere, namely, the heliospheric current sheet (HCS). However, the SMF becomes more complicated over the solar cycle, comprising higher-order components. The overlapping of the dipole and multipole components of the SMF suggests a formation of more than one QCS in the corona, which may expand further to the heliosphere. We study the impact of the.,Qquadrupole and octupole harmonics of the SMF on the formation and spatial characteristics of QCSs, building a stationary axisymmetric MHD model of QCSs in the heliosphere. It is shown that if the dipole component dominates, a single QCS appears in the solar wind at low heliolatitudes as the classic HCS. In other.,Qcases, the number of QCSs varies from one to three, depending on the relative input of the quadrupole and octupole components. QCSs possess a conic form and may occur at a wide variety of heliolatitudes. The existence of QCSs opens wide opportunities for explanations of puzzling observations of cosmic rays and energetic particles in the heliosphere and, at the same time, raises a risk of misinterpretation of in situ crossings of QCSs because of mixing up the HCS and higherheliolatitude QCSs, which can be significantly disturbed in the dynamical solar wind. Subject Solar WindSun: HeliosphereSun: Magnetic Fields To reference this document use: http://resolver.tudelft.nl/uuid:a8b1097c-3f5a-405e-ba2f-3733f8ba4061 DOI https://doi.org/10.3847/1538-4357/ab0e01 ISSN 0004-637X Source The Astrophysical Journal: an international review of astronomy and astronomical physics, 875 (1) Part of collection Institutional Repository Document type journal article Rights © 2019 S.M. Cazaux, Yann Arribard, Dmitrii Egorov, Julianna Palotás, Ronnie Hoekstra, Giel Berden, Jos Oomens, Thomas Schlathölter Files PDF Cazaux_2019_ApJ_875_27.pdf 1.87 MB Close viewer /islandora/object/uuid:a8b1097c-3f5a-405e-ba2f-3733f8ba4061/datastream/OBJ/view