Temporal variations in fibril orientation

J. Koza; P. Sütterlin; A. Kucera; J. Rybák

Temporal variations in fibril orientation

J. Koza, P. Sütterlin, A. Kucera, J. Rybák

Dept of Physics

extern

Research output: Chapter in Book/Report/Conference proceeding › Chapter › Academic › peer-review

Abstract

We measure variations in orientation of fourteen dynamic fibrils as a function of time in a small isolated plage and nearby network using a 10- min time sequence of Hα filtergrams obtained by the Dutch Open Telescope. We found motions with average angular velocities of the order of 1 deg min−1 suggesting systematic turning from one limit position to another, particularly apparent in the case of fibrils with lifetimes of a few minutes. Shorter fibrils tend to turn faster than longer ones, which we interpret as due to vortex flows in the underlying granulation that twist magnetic fields.

Original language	Undefined/Unknown
Title of host publication	The physics of chromospheric plasmas : proceedings of the Coimbra Solar Physics Meeting held at the University of Coimbra, Coimbra, Portugal, October 9 - October 13, 2006
Editors	Petr Heinzel, Ivan Dorotovic, Robert J. Rutten
Place of Publication	San Francisco
Publisher	Astronomical Society of the Pacific
Pages	115-118
Number of pages	653
ISBN (Print)	9781583812365
Publication status	Published - 2007

Publication series

Name	Astronomical Society of the Pacific conference series
Number	368

Embargoed Document

368-0115[1]
Final published version, 399 KB
Embargo ends: 1/01/50
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Cite this

Koza, J., Sütterlin, P., Kucera, A., & Rybák, J. (2007). Temporal variations in fibril orientation. In P. Heinzel, I. Dorotovic, & R. J. Rutten (Eds.), The physics of chromospheric plasmas : proceedings of the Coimbra Solar Physics Meeting held at the University of Coimbra, Coimbra, Portugal, October 9 - October 13, 2006 (pp. 115-118). (Astronomical Society of the Pacific conference series; No. 368). Astronomical Society of the Pacific.

Koza, J. ; Sütterlin, P. ; Kucera, A. et al. / Temporal variations in fibril orientation. The physics of chromospheric plasmas : proceedings of the Coimbra Solar Physics Meeting held at the University of Coimbra, Coimbra, Portugal, October 9 - October 13, 2006. editor / Petr Heinzel ; Ivan Dorotovic ; Robert J. Rutten. San Francisco : Astronomical Society of the Pacific, 2007. pp. 115-118 (Astronomical Society of the Pacific conference series; 368).

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abstract = "We measure variations in orientation of fourteen dynamic fibrils as a function of time in a small isolated plage and nearby network using a 10- min time sequence of Hα filtergrams obtained by the Dutch Open Telescope. We found motions with average angular velocities of the order of 1 deg min−1 suggesting systematic turning from one limit position to another, particularly apparent in the case of fibrils with lifetimes of a few minutes. Shorter fibrils tend to turn faster than longer ones, which we interpret as due to vortex flows in the underlying granulation that twist magnetic fields.",

author = "J. Koza and P. S{\"u}tterlin and A. Kucera and J. Ryb{\'a}k",

year = "2007",

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series = "Astronomical Society of the Pacific conference series",

publisher = "Astronomical Society of the Pacific",

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Koza, J, Sütterlin, P, Kucera, A & Rybák, J 2007, Temporal variations in fibril orientation. in P Heinzel, I Dorotovic & RJ Rutten (eds), The physics of chromospheric plasmas : proceedings of the Coimbra Solar Physics Meeting held at the University of Coimbra, Coimbra, Portugal, October 9 - October 13, 2006. Astronomical Society of the Pacific conference series, no. 368, Astronomical Society of the Pacific, San Francisco, pp. 115-118.

Temporal variations in fibril orientation. / Koza, J.; Sütterlin, P.; Kucera, A. et al.
The physics of chromospheric plasmas : proceedings of the Coimbra Solar Physics Meeting held at the University of Coimbra, Coimbra, Portugal, October 9 - October 13, 2006. ed. / Petr Heinzel; Ivan Dorotovic; Robert J. Rutten. San Francisco: Astronomical Society of the Pacific, 2007. p. 115-118 (Astronomical Society of the Pacific conference series; No. 368).

Research output: Chapter in Book/Report/Conference proceeding › Chapter › Academic › peer-review

TY - CHAP

T1 - Temporal variations in fibril orientation

AU - Koza, J.

AU - Sütterlin, P.

AU - Kucera, A.

AU - Rybák, J.

PY - 2007

Y1 - 2007

N2 - We measure variations in orientation of fourteen dynamic fibrils as a function of time in a small isolated plage and nearby network using a 10- min time sequence of Hα filtergrams obtained by the Dutch Open Telescope. We found motions with average angular velocities of the order of 1 deg min−1 suggesting systematic turning from one limit position to another, particularly apparent in the case of fibrils with lifetimes of a few minutes. Shorter fibrils tend to turn faster than longer ones, which we interpret as due to vortex flows in the underlying granulation that twist magnetic fields.

AB - We measure variations in orientation of fourteen dynamic fibrils as a function of time in a small isolated plage and nearby network using a 10- min time sequence of Hα filtergrams obtained by the Dutch Open Telescope. We found motions with average angular velocities of the order of 1 deg min−1 suggesting systematic turning from one limit position to another, particularly apparent in the case of fibrils with lifetimes of a few minutes. Shorter fibrils tend to turn faster than longer ones, which we interpret as due to vortex flows in the underlying granulation that twist magnetic fields.

M3 - Chapter

SN - 9781583812365

T3 - Astronomical Society of the Pacific conference series

SP - 115

EP - 118

BT - The physics of chromospheric plasmas : proceedings of the Coimbra Solar Physics Meeting held at the University of Coimbra, Coimbra, Portugal, October 9 - October 13, 2006

A2 - Heinzel, Petr

A2 - Dorotovic, Ivan

A2 - Rutten, Robert J.

PB - Astronomical Society of the Pacific

CY - San Francisco

ER -

Koza J, Sütterlin P, Kucera A, Rybák J. Temporal variations in fibril orientation. In Heinzel P, Dorotovic I, Rutten RJ, editors, The physics of chromospheric plasmas : proceedings of the Coimbra Solar Physics Meeting held at the University of Coimbra, Coimbra, Portugal, October 9 - October 13, 2006. San Francisco: Astronomical Society of the Pacific. 2007. p. 115-118. (Astronomical Society of the Pacific conference series; 368).