Macrospicule Jets in On-Disk Coronal Holes

Friday, 19 December 2014
Mitzi Adams, NASA Marshall Space Flight Center, ZP13, Huntsville, AL, United States, Alphonse C Sterling, NASA Marshall Space Flight Center, Huntsville, AL, United States and Ronald L Moore, University of Alabama in Huntsville, CSPAR, Huntsville, AL, United States
We examine the magnetic structure and dynamics of multiple jets found in coronal holes close to or on disk center. All data are from the Atmospheric Imaging Assembly (AIA) and the Helioseismic and Magnetic Imager (HMI) of the Solar Dynamics Observatory (SDO). We report on observations of ten jets in an equatorial coronal hole from 2011 February 27 and multiple jets found in equatorial coronal holes on these dates: 2010-June-4, 2012-March-13, 2013-May 29-2013, and 2014-February-24. We will show in detail the evolution of the jets and will compare the magnetic field arrangement and probable trigger mechanism of these events to those of a specific macrospicule jet observed on 2011 February 27. We recently discovered that this jet is a previously-unrecognized variety of blowout jet (Adams et al 2014, ApJ, 783: 11). In this variety, the reconnection bright point is not made by interchange reconnection of initially-closed erupting field in the base of the jet with ambient open field but is a miniature filament-eruption flare arcade made by internal reconnection of the legs of the erupting field.