Variability of solar/stellar activity and magnetic field and its influence on planetary atmosphere evolution

Earth, Planets and Space

Table 5. Solar radiation flux enhancement as function of wavelength normalized to the present solar flux value from present to 3.9 Gyr ago (Ribas et al., 2005; Güdel, 2007).

Solar age [Gyr]	t b.p. [Gyr]	X-ray [1–20 Å ]	SXR [20–100 Å ]	EUV [100–920 Å ]	FUV [920–1180 Å ]	Lyman-α [1200–1300 Å ]	UV [1300–1700 Å ]
4.6	0	1	1	1	1	1	1
3.2	1.4	2	1.6	1.5	1.4	1.3	—
2.6	2	3	2	1.9	1.6	1.5	—
1.9	2.7	6	3	2.7	2.1	1.9	2.4
1.1	3.5	16	6	5.1	3.4	2.8	—
0.7	3.9	37	11	8.6	5	3.9	—

Solar age [Gyr]	t b.p. [Gyr]	X-ray [1–20 Å ]	SXR [20–100 Å ]	EUV [100–920 Å ]	FUV [920–1180 Å ]	Lyman-α [1200–1300 Å ]	UV [1300–1700 Å ]
4.6	0	1	1	1	1	1	1
3.2	1.4	2	1.6	1.5	1.4	1.3	—
2.6	2	3	2	1.9	1.6	1.5	—
1.9	2.7	6	3	2.7	2.1	1.9	2.4
1.1	3.5	16	6	5.1	3.4	2.8	—
0.7	3.9	37	11	8.6	5	3.9	—

Solar age [Gyr]	t b.p. [Gyr]	X-ray [1–20 Å ]	SXR [20–100 Å ]	EUV [100–920 Å ]	FUV [920–1180 Å ]	Lyman-α [1200–1300 Å ]	UV [1300–1700 Å ]
4.6	0	1	1	1	1	1	1
3.2	1.4	2	1.6	1.5	1.4	1.3	—
2.6	2	3	2	1.9	1.6	1.5	—
1.9	2.7	6	3	2.7	2.1	1.9	2.4
1.1	3.5	16	6	5.1	3.4	2.8	—
0.7	3.9	37	11	8.6	5	3.9	—

Solar age [Gyr]	t b.p. [Gyr]	X-ray [1–20 Å ]	SXR [20–100 Å ]	EUV [100–920 Å ]	FUV [920–1180 Å ]	Lyman-α [1200–1300 Å ]	UV [1300–1700 Å ]
4.6	0	1	1	1	1	1	1
3.2	1.4	2	1.6	1.5	1.4	1.3	—
2.6	2	3	2	1.9	1.6	1.5	—
1.9	2.7	6	3	2.7	2.1	1.9	2.4
1.1	3.5	16	6	5.1	3.4	2.8	—
0.7	3.9	37	11	8.6	5	3.9	—