Dynamics of chromospheric upflows and underlying magnetic fields

Vasyl Yurchyshyn, V. Abramenko, P. Goode

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

We used Hα-0.1 nm and magnetic field (at 1.56μ) data obtained with the New Solar Telescope to study the origin of the disk counterparts to type II spicules, so-called rapid blueshifted excursions (RBEs). The high time cadence of our chromospheric (10 s) and magnetic field (45 s) data allowed us to generate x-t plots using slits parallel to the spines of the RBEs. These plots, along with potential field extrapolation, led us to suggest that the occurrence of RBEs is generally correlated with the appearance of new, mixed, or unipolar fields in close proximity to network fields. RBEs show a tendency to occur at the interface between large-scale fields and small-scale dynamic magnetic loops and thus are likely to be associated with the existence of a magnetic canopy. Detection of kinked and/or inverse "Y"-shaped RBEs further confirm this conclusion.

Original languageEnglish (US)
Article number17
JournalAstrophysical Journal
Volume767
Issue number1
DOIs
StatePublished - Apr 10 2013

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Keywords

  • Sun: chromosphere
  • Sun: photosphere

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