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Issue A&A
Volume 436, Number 2, June III 2005
Page(s) L43 - L46
Section Letters
DOI http://dx.doi.org/10.1051/0004-6361:200500119



A&A 436, L43-L46 (2005)
DOI: 10.1051/0004-6361:200500119

Letter

Blinker/macro-spicule activity in an off-limb polar region

E. O'Shea1, D. Banerjee2 and J. G. Doyle1

1  Armagh Observatory, College Hill, Armagh BT61 9DG, N. Ireland
    e-mail: [eos;jgd]@arm.ac.uk
2  Indian Institute of Astrophysics, II Block, Koramangala, Bangalore 560 034, India
    e-mail: dipu@iiap.res.in



(Received 6 April 2005 / Accepted 30 April 2005)

Abstract
Using measurements of $\ion{O}{v}$ 629.73 Å from the Coronal Diagnostic Spectrometer (CDS) on board SOHO we report on blinker activity in off-limb regions above the Northern pole of the Sun. The blinkers are found to be occurring above a region showing strong dynamic activity, with evidence for evacuation of plasma. The presence of blinkers is discussed in terms of the heating of spicular material.


Key words: Sun: UV radiation -- Sun: transition region -- Sun: atmosphere




© ESO 2005


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