SOLAR POLAR X-RAY JETS AND MULTIPLE BRIGHT POINTS: EVIDENCE FOR SYMPATHETIC ACTIVITY

We present an analysis of X-ray bright points (BPs) and X-ray jets observed by Hinode/X-Ray Telescope on 2007 November 2-4, within the solar northern polar coronal hole. After selecting small subregions that include several BPs, we followed their brightness evolution over a time interval of a few ho...

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Bibliographic Details
Published in:Astrophysical journal. Letters 2012-02, Vol.745 (2), p.1-5
Main Authors: Pucci, Stefano, Poletto, Giannina, Sterling, Alphonse C, Romoli, Marco
Format: Article
Language:English
Subjects:
ASTROPHYSICS
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
Brightening
BRIGHTNESS
Evolution
Flares
JETS
MAGNETIC FIELDS
Small scale
SOLAR CORONA
SOLAR FLARES
Space telescopes
SUN
TELESCOPES
X RADIATION
X-rays
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Summary:We present an analysis of X-ray bright points (BPs) and X-ray jets observed by Hinode/X-Ray Telescope on 2007 November 2-4, within the solar northern polar coronal hole. After selecting small subregions that include several BPs, we followed their brightness evolution over a time interval of a few hours, when several jets were observed. We find that most of the jets occurred in close temporal association with brightness maxima in multiple BPs: more precisely, most jets are closely correlated with the brightening of at least two BPs. We suggest that the jets result from magnetic connectivity changes that also induce the BP variability. We surmise that the jets and implied magnetic connectivity we describe are small-scale versions of the active-region-scale phenomenon, whereby flares and eruptions are triggered by interacting bipoles.
ISSN:2041-8205
2041-8213
DOI:10.1088/2041-8205/745/2/L31