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Journal articleLeske RA, Christian ER, Cohen CMS, et al., 2020,
Observations of the 2019 April 4 Solar Energetic Particle Event at theParker Solar Probe
, ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, Vol: 246, ISSN: 0067-0049 -
Journal articleStansby D, Matteini L, Horbury TS, et al., 2020,
The origin of slow Alfvenic solar wind at solar minimum
, Monthly Notices of the Royal Astronomical Society, Vol: 492, Pages: 39-44, ISSN: 0035-8711Although the origins of slow solar wind are unclear, there is increasing evidence that at least some of it is released in a steady state on overexpanded coronal hole magnetic field lines. This type of slow wind has similar properties to the fast solar wind, including strongly Alfvénic fluctuations. In this study, a combination of proton, alpha particle, and electron measurements are used to investigate the kinetic properties of a single interval of slow Alfvénic wind at 0.35 au. It is shown that this slow Alfvénic interval is characterized by high alpha particle abundances, pronounced alpha–proton differential streaming, strong proton beams, and large alpha-to-proton temperature ratios. These are all features observed consistently in the fast solar wind, adding evidence that at least some Alfvénic slow solar wind also originates in coronal holes. Observed differences between speed, mass flux, and electron temperature between slow Alfvénic and fast winds are explained by differing magnetic field geometry in the lower corona.
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Journal articlede Wit TD, Krasnoselskikh VV, Bale SD, et al., 2020,
Switchbacks in the Near-Sun Magnetic Field: Long Memory and Impact on the Turbulence Cascade
, ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, Vol: 246, ISSN: 0067-0049 -
Journal articleBandyopadhyay R, Goldstein ML, Maruca BA, et al., 2020,
Enhanced Energy Transfer Rate in Solar Wind Turbulence Observed near the Sun from Parker Solar Probe
, ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, Vol: 246, ISSN: 0067-0049 -
Journal articleNemecek Z, Durovcova T, Safrankova J, et al., 2020,
What is the solar wind frame of reference?
, The Astrophysical Journal: an international review of astronomy and astronomical physics, Vol: 889, Pages: 1-14, ISSN: 0004-637XVarious solar wind ion species move with different speeds and theoretical considerations as well as limited observations in a region close to the Sun show that heavy solar wind ions tend to flow faster than protons, at least in less-aged fast solar wind streams. The solar wind flow carries the frozen-in interplanetary magnetic field (IMF) and this situation evokes three related questions: (i) what is the proper solar wind speed, (ii) is this speed equal to the speed of the dominant component, whatever that may be, and (iii) what is the speed of the magnetic field? We show that simple theoretical considerations based on the MHD approximation as well as on the dynamics of charged particles in electric and magnetic fields suggest that the IMF velocity of motion (de Hoffmann–Teller (HT) velocity) would be deliberated as the velocity appropriate for solar wind studies. Our analysis based on the Wind, Helios, ACE, and SOHO observations of differential streaming of solar wind populations shows that their energy is conserved in the HT frame. On the other hand, the noise and temporal resolution of the data do not allow us to decide whether the total momentum is also conserved in this frame.
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Journal articleHuang J, Kasper JC, Vech D, et al., 2020,
Proton Temperature Anisotropy Variations in Inner Heliosphere Estimated with the First <i>Parker Solar Probe</i> Observations
, ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, Vol: 246, ISSN: 0067-0049- Author Web Link
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- Citations: 74
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Journal articleChaston CC, Bonnell JW, Bale SD, et al., 2020,
MHD Mode Composition in the Inner Heliosphere from the <i>Parker Solar Probe</i>'s First Perihelion
, ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, Vol: 246, ISSN: 0067-0049- Author Web Link
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- Citations: 28
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Journal articleWiedenbeck ME, Bucik R, Mason GM, et al., 2020,
<SUP>3</SUP>He-rich Solar Energetic Particle Observations at the <i>Parker Solar Probe</i> and near Earth
, ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, Vol: 246, ISSN: 0067-0049- Author Web Link
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- Citations: 33
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Journal articleReville V, Velli M, Panasenco O, et al., 2020,
The Role of Alfven Wave Dynamics on the Large-scale Properties of the Solar Wind: Comparing an MHD Simulation with <i>Parker Solar Probe</i> E1 Data
, ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, Vol: 246, ISSN: 0067-0049- Author Web Link
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- Citations: 88
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Journal articlePage B, Bale SD, Bonnell JW, et al., 2020,
Examining Dust Directionality with the <i>Parker Solar Probe</i> FIELDS Instrument
, ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, Vol: 246, ISSN: 0067-0049- Author Web Link
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- Citations: 32
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Journal articleMozer FS, Agapitov OV, Bale SD, et al., 2020,
Time Domain Structures and Dust in the Solar Vicinity: <i>Parker Solar Probe</i> Observations
, ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, Vol: 246, ISSN: 0067-0049- Author Web Link
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- Citations: 14
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Journal articleZhao L-L, Zank GP, Adhikari L, et al., 2020,
Identification of Magnetic Flux Ropes from <i>Parker Solar Probe</i> Observations during the First Encounter
, ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, Vol: 246, ISSN: 0067-0049- Author Web Link
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- Citations: 72
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Journal articleQudsi RA, Maruca BA, Matthaeus WH, et al., 2020,
Observations of Heating along Intermittent Structures in the Inner Heliosphere from <i>PSP</i> Data
, ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, Vol: 246, ISSN: 0067-0049- Author Web Link
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- Citations: 29
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Journal articleRouillard AP, Kouloumvakos A, Vourlidas A, et al., 2020,
Relating Streamer Flows to Density and Magnetic Structures at the <i>Parker Solar Probe</i>
, ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, Vol: 246, ISSN: 0067-0049- Author Web Link
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- Citations: 60
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Journal articlePanasenco O, Velli M, D'Amicis R, et al., 2020,
Exploring Solar Wind Origins and Connecting Plasma Flows from the <i>Parker Solar Probe</i> to 1 au: Nonspherical Source Surface and Alfvenic Fluctuations
, ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, Vol: 246, ISSN: 0067-0049- Author Web Link
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- Citations: 55
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Journal articleChhiber R, Goldstein ML, Maruca BA, et al., 2020,
Clustering of Intermittent Magnetic and Flow Structures near <i>Parker</i> <i>Solar Probe</i>'s First Perihelion-A Partial-variance-of-increments Analysis
, ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, Vol: 246, ISSN: 0067-0049- Author Web Link
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- Citations: 42
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Journal articleSzabo A, Larson D, Whittlesey P, et al., 2020,
The Heliospheric Current Sheet in the Inner Heliosphere Observed by the<i>Parker Solar Probe</i>
, ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, Vol: 246, ISSN: 0067-0049 -
Journal articleParashar TN, Goldstein ML, Maruca BA, et al., 2020,
Measures of Scale-dependent Alfvenicity in the First <i>PSP</i> Solar Encounter
, ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, Vol: 246, ISSN: 0067-0049- Cite
- Citations: 59
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Journal articleMoncuquet M, Meyer-Vernet N, Issautier K, et al., 2020,
First In Situ Measurements of Electron Density and Temperature from Quasi-thermal Noise Spectroscopy with <i>Parker Solar Probe</i>/FIELDS
, ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, Vol: 246, ISSN: 0067-0049- Cite
- Citations: 147
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Journal articleNieves-Chinchilla T, Szabo A, Korreck KE, et al., 2020,
Analysis of the Internal Structure of the Streamer Blowout Observed by the <i>Parker Solar Probe</i> During the First Solar Encounter
, ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, Vol: 246, ISSN: 0067-0049- Author Web Link
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- Citations: 38
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Journal articleMaksimovic M, Bale SD, Bercic L, et al., 2020,
Anticorrelation between the Bulk Speed and the Electron Temperature in the Pristine Solar Wind: First Results from the <i>Parker Solar Probe</i> and Comparison with <i>Helios</i>
, ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, Vol: 246, ISSN: 0067-0049- Cite
- Citations: 67
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Journal articleVech D, Kasper JC, Klein KG, et al., 2020,
Kinetic-scale Spectral Features of Cross Helicity and Residual Energy in the Inner Heliosphere
, ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, Vol: 246, ISSN: 0067-0049- Author Web Link
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- Citations: 8
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ReportCeppi P, Gregory J, 2020,
Climate sensitivity: What is it, and why is it important?
, Climate sensitivity: What is it, and why is it important?, Publisher: The Grantham Institute, 11Climate sensitivity is a fundamental measure of global climate change. This briefing paper explains how climate sensitivity is estimated from different lines of evidence – modelling, observations, and palaeoclimate records – and why its exact value remains uncertain.
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Journal articleShatwell P, Czaja A, Ferreira D, 2020,
Ocean heat storage rate unaffected by MOC weakening in an idealised climate model
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Journal articleCohen CMS, Christian ER, Cummings AC, et al., 2020,
Energetic Particle Increases Associated with Stream Interaction Regions
, ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, Vol: 246, ISSN: 0067-0049- Author Web Link
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- Citations: 32
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Journal articleDesai MI, Mitchell DG, Szalay JR, et al., 2020,
Properties of Suprathermal-through-energetic He Ions Associated with Stream Interaction Regions Observed over the <i>Parker Solar Probe's</i> First Two Orbits
, ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, Vol: 246, ISSN: 0067-0049- Author Web Link
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- Citations: 39
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Journal articleSchwadron NA, Bale S, Bonnell J, et al., 2020,
Seed Population Preconditioning and Acceleration Observed by the <i>Parker Solar Probe</i>
, ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, Vol: 246, ISSN: 0067-0049- Author Web Link
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- Citations: 26
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Journal articleMitchell DG, Giacalone J, Allen RC, et al., 2020,
CME-associated Energetic Ions at 0.23 au: Consideration of the Auroral Pressure Cooker Mechanism Operating in the Low Corona as a Possible Energization Process
, ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, Vol: 246, ISSN: 0067-0049- Author Web Link
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- Citations: 21
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Journal articleHalekas JS, Whittlesey P, Larson DE, et al., 2020,
Electrons in the Young Solar Wind: First Results from the <i>Parker Solar Probe</i>
, ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, Vol: 246, ISSN: 0067-0049- Author Web Link
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- Citations: 125
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Journal articleMozer FS, Agapitov OV, Bale SD, et al., 2020,
Switchbacks in the Solar Magnetic Field: Their Evolution, Their Content, and Their Effects on the Plasma
, ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, Vol: 246, ISSN: 0067-0049- Author Web Link
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- Citations: 97
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