UNSPECIFIED. (2003) Line-of-sight effects on observability of kink and sausage modes in coronal structures with imaging telescopes. ASTRONOMY & ASTROPHYSICS, 397 (2). pp. 765-770. ISSN 0004-6361

Full text not available from this repository.

Abstract

Kink modes of solar coronal structures, perturbing the loop in the direction along the line-of-sight (LOS), can be observed as emission intensity disturbances propagating along the loop provided the angle between the LOS and the structure is not ninety degrees. The effect is based upon the change of the column depth of the loop (along the LOS) by the wave. The observed amplitude of the emission intensity variations can be larger than the actual amplitude of the wave by a factor of two and there is an optimal angle maximizing the observed amplitude. For other angles this effect can also attenuate the observed wave amplitude. The observed amplitude depends upon the ratio of the wave length of kink perturbations to the width of the structure and on the angle between the LOS and the axis of the structure. Sausage modes are always affected negatively from the observational point of view, as the observed amplitude is always less than the actual one. This effect should be taken into account in the interpretation of wave phenomena observed in the corona with space-borne and ground-based imaging telescopes.

Item Type:	Journal Article
Subjects:	Q Science > QB Astronomy
Journal or Publication Title:	ASTRONOMY & ASTROPHYSICS
Publisher:	E D P SCIENCES
ISSN:	0004-6361
Date:	January 2003
Volume:	397
Number:	2
Number of Pages:	6
Page Range:	pp. 765-770
Identification Number:	10.1051/0004-6361:20021556
Publication Status:	Published
URI:	http://wrap.warwick.ac.uk/id/eprint/10207

Data sourced from Thomson Reuters' Web of Knowledge

Request changes to a record

Actions (login required)

View Item