Sharp Alfvenic Impulses in the Near-Sun Solar Wind: Properties and Possible Origins

Timothy Simon Horbury1, Lorenzo Matteini2, Thomas Woolley3, Ronan Laker4, Denise Perrone5, David Stansby6, Marco Velli7, Benjamin D G Chandran8, Stuart D Bale9, Justin Christophe Kasper10, Michael Louis Stevens11, Marc Pulupa9, Kelly E Korreck12, Davin E Larson13, Roberto Livi14, Phyllis L Whittlesey14, David Malaspina15, John W Bonnell9, Peter Harvey9, Keith Goetz16, Thierry Dudok de Wit17, Robert J. MacDowall18 and The Parker Solar Probe FIELDS and SWEAP instrument teams, (1)Imperial College, London, United Kingdom, (2)Observatoire De Paris, LESIA, Meudon, FRANCE, (3)Imperial College London, London, United Kingdom, (4)Imperial College London, Physics, London, United Kingdom, (5)Universita' della Calabria, Rende, Italy, (6)Imperial College London, London, SW7, United Kingdom, (7)University of California Los Angeles, Los Angeles, CA, United States, (8)University of New Hampshire, Durham, NH, United States, (9)University of California, Berkeley, Space Sciences Laboratory, Berkeley, CA, United States, (10)University of Michigan, Ann Arbor, MI, United States, (11)Smithsonian Astrophysics Observatory, Cambridge, MA, United States, (12)Smithsonian Observatory, Cambridge, MA, United States, (13)Space Sciences Laboratory, Berkeley, CA, United States, (14)University of California Berkeley, Berkeley, CA, United States, (15)University of Colorado, Boulder, Laboratory for Atmospheric and Space Physics, Boulder, CO, United States, (16)University of Minnesota, Minneapolis, MN, United States, (17)LPC2E, CNRS and University of Orléans, Orléans, France, (18)NASA Goddard SFC, Greenbelt, MD, United States