A new trigger mechanism for coronal mass ejections - The role of confined flares and photospheric motions in the formation of hot flux ropes

Free Access

Table 2.

Orbital motions of umbral flux fragments relative to previously-emerged umbrae and the observed active region chiralities.

NOAA	Start Time	End Time	Total Orbit	Avg. Orbit	Emerging	Coronal	Estimated FR
AR	(UT)	(UT)	(°)	(° day⁻¹)	Flux	Field	Height (Mm)
11429	04 Mar 12 18:00 ^(a)	06 Mar 12 18:00	−74	−37	LH	LH	56 ± 5
	07 Mar 12 00:00 ^(a)	08 Mar 12 06:00	−36	−29
	08 Mar 12 12:00 ^(a)	14 Mar 12 12:00	−19	−3
	08 Mar 12 12:00 ^(b)	14 Mar 12 12:00	−180	−30

11504	09 Jun 12 18:00	10 Jun 12 18:00	+2	+2	RH	RH	173 ± 26
	11 Jun 12 06:00	12 Jun 12 12:00	+60	+48			89 ± 30
	12 Jun 12 18:00	15 Jun 12 18:00	+186	+62

11585	03 Oct 12 06:00	06 Oct 12 00:00	−111	−40	LH	LH	98 ± 25
	06 Oct 12 12:00	08 Oct 12 00:00	−41	−27
	08 Oct 12 12:00	09 Oct 12 00:00	−7	−14

12665	08 Jul 17 00:00	10 Jul 17 00:00	−92	−46	LH	LH	71 ± 20
	10 Jul 17 06:00	14 Jul 17 00:00	−47	−12.5
	14 Jul 17 00:00	15 Jul 17 00:00	−43	−43

Notes. Start Time and End Time delineate periods that orbiting motions of magnetic flux fragments were tracked over. In the total and averaged (avg.) daily orbital motions, positive angles are clockwise and negative angles are anticlockwise. Emerging flux and coronal field is determined as left-handed (LH) or right-handed (RH) as outlined in Sect. 3.3. Estimated heights of the flux ropes that formed in each active region are produced by the method described in Sect. 3.2.

^(a)

In the case of March 2012, the first three rows represent the orbiting given by the fragment-tracking method. Observations suggest that the full extent of the orbiting from 8 to 14 March is not detected.

^(b)

The fourth row for March 2012 contains orbit angles estimated by-eye.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.