Ubiquitous quiet-Sun jets

Abstract

Context. IMaX/Sunrise has recently reported the temporal evolution of highly dynamic and strongly Doppler shifted Stokes V signals in the quiet Sun. Aims. We attempt to identify the same quiet-Sun jets in the Hinode spectropolarimeter (SP) data set. Methods. We generate combinations of linear polarization magnetograms with blue-and redshifted far-wing circular polarization magnetograms to allow an easy identification of the quiet-Sun jets.Results. The jets are identified in the Hinode data where both red-and blueshifted cases are often found in pairs. They appear next to regions of transverse fields that exhibit quiet-Sun neutral lines. They also have a clear tendency to occur in the outer boundary of the granules. These regions always display highly displaced and anomalous Stokes V profiles. Conclusions. The quiet Sun is pervaded with jets formed when new field regions emerge at granular scales loaded with horizontal field lines that interact with their surroundings. This interaction is suggestive of some form of reconnection of the involved field lines that generates the observed high speed flows.

Brightness Contrast of Solar Magnetic Elements Observed by Sunrise

“…This conclusion is based on detecting linear polarization signals between two opposite polarity features around the detected jets. Those events were also found by Rubio da Costa et al (2015) and Martínez Pillet et al (2011a). Another explanation is the rebound of downward flows caused by the convective instability when hitting dense layers (Grossmann-Doerth et al 1998, Requerey et al 2014.…”

Magnetic Upflow Events in the Quiet-Sun Photosphere. I. Observations

“…Those large velocities were, however, inferred based on a single continuum position, from which the shape of Stokes V profiles could not be sampled. The existence of these magnetic upflows was later confirmed by Martínez Pillet et al (2011b) who referred to them as photospheric jets. They made use of data from Hinode/SP (Tsuneta et al 2008), which have lower spatial resolution, but a higher spectral sampling compared to the data from SUNRISE.…”

“…In the above studies, only single-lobed Stokes V profiles were reported at the spatial locations of the rapid magnetic upflows, albeit Martínez Pillet et al (2011b) also noted observations of highly asymmetric Stokes V profiles with multiple lobes (shifted with respect to the rest wavelength position). However, they did not analyze the profiles.…”