Small-Scale X-Ray/EUV Jets Seen in Hinode XRT and TRACE

Abstract

Abstract We present the morphological and kinematic characteristics of three small-scale X-ray/EUV jets simultaneously observed by the Hinode XRT and the TRACE. For this, we examined all XRT movies with a thin Al/Poly filter from 2006 October 20 to 2007 April 8, and then found 34 small-scale eruptions. We next took a look at the corresponding TRACE 171/195 Å images associated with the eruptions. As a result, we found three simultaneous X-ray and EUV jets. For two different bands, they have similar characteristics in terms of the projected speed (90–310 km s$^{-1}$), lifetime (100–2000 s), and size (1.1–5$\times$10$^5$km). These characteristics are similar to the previous results by the Yohkoh SXT, but are quite different from EUV jets associated with H$\alpha$ surges. From the EUV Imaging Spectrometer, four spectral lines for the last event, we found blueshift (up to $-$64 km s$^{-1}$) and redshift (up to 20 km s$^{-1}$) motions as well as nonthermal velocities ranging from 57 to 106 km s$^{-1}$ at the jet footpoint. We note a tendency: the hotter the maximum ionization temperature is, the smaller the area of blueshift region is. These characteristics are consistent with a typical jet model that includes the magnetic reconnection between open coronal fields and emerging magnetic fields.