Iron-rich solar particle events measured by SOHO/ERNE during two solar cycles

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Volume 589 (May 2016)

A&A, 589 (2016) A138

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Table 2

Average heavy ion abundances for Fe-rich events.

Element	All	Cycle	Cycle	Gradual	LSEP	Corona
	events^a	23^b	24^c	events^d	events^e	(1.4 × 10⁶ K)^f

C	=1.000	=1.000	=1.000	= 1.00 ± 0.03	= 1.00 ± 0.05	=1.00
N	0.303 ± 0.014	0.299 ± 0.017	0.315 ± 0.022	0.27 ± 0.01	0.33 ± 0.01	0.25
O	2.062 ± 0.080	2.127 ± 0.098	1.864 ± 0.118	2.15 ± 0.05	2.77 ± 0.11	2.04
Ne	0.541 ± 0.068	0.591 ± 0.086	0.371 ± 0.037	0.33 ± 0.01	0.42 ± 0.02	0.39
Mg	0.521 ± 0.044	0.552 ± 0.054	0.422 ± 0.046	0.42 ± 0.01	0.63 ± 0.03	0.46
Si	0.422 ± 0.036	0.461 ± 0.044	0.304 ± 0.052	0.33 ± 0.01	0.65 ± 0.04	0.44
S	0.075 ± 0.010	0.085 ± 0.012	0.050 ± 0.013	0.07 ± 0.00	0.16 ± 0.01	0.06
Ar	0.008 ± 0.003	0.010 ± 0.004	0.001 ± 0.001	0.01 ± 0.00	...	0.01
Ca	0.044 ± 0.010	0.048 ± 0.011	0.029 ± 0.020	0.02 ± 0.00	0.06 ± 0.01	0.03
Fe	1.104 ± 0.166	1.283 ± 0.222	0.630 ± 0.080	0.23 ± 0.01	1.12 ± 0.14	0.38

Notes.

^(a)

All events, this work.

^(b)

Solar cycle 23, this work.

^(c)

Solar cycle 24, this work.

^(d)

Gradual events (Reames 1995).

^(e)

Large solar energetic particle (LSEP) events (Desai et al. 2006).

^(f)

Quiet corona at 1.4 × 10⁶ K (Feldman & Widing 2003).

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