Astronomy & Astrophysics

Table 1: Geometrical parameters of the oscillating loop obtained for three loop geometries^a.
Models l₁ b₁ l₂ b₂ $\alpha$ $\theta$ h₀ a and b (or r) L

(deg) (deg) (deg) (deg) (deg) (deg) (Mm) (Mm) (Mm)

Circle 93.5 22.0 99.5 17.0 39.8 30.5 48 r = 66 312

Fat ellipse 94.5 22.0 104.0 17.0 27.8 22.0 48 a = 104 and b = 60 391

Thin ellipse 94.0 22.0 97.5 17.2 53.9 36.5 51 a = 49 and b = 73 300

^a (l₁, b₁) and (l₂, b₂) are the heliographic longitude and latitude relative to Sun center of the two footpoints of the loop. $\alpha$ is the azimuth angle of the loop baseline to the east-west direction. $\theta$ is the inclination angle of the loop plane to the vertical. h₀ is the height of the ellipse's (or circle's) center measured in the loop plane. a and b are half lengths of the elliptical axes lying parallel and perpendicular to the loop footpoint baseline, respectively; r is the radius of the circular loop. L is the length of the loop.

**Table 1:** Geometrical parameters of the oscillating loop obtained for three loop geometries^a.
Models	l₁	b₁	l₂	b₂	$\alpha$	$\theta$	h₀	a and b (or r)	L
	(deg)	(deg)	(deg)	(deg)	(deg)	(deg)	(Mm)	(Mm)	(Mm)
Circle	93.5	22.0	99.5	17.0	39.8	30.5	48	r = 66	312
Fat ellipse	94.5	22.0	104.0	17.0	27.8	22.0	48	a = 104 and b = 60	391
Thin ellipse	94.0	22.0	97.5	17.2	53.9	36.5	51	a = 49 and b = 73	300

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