1. Quiet Sun magnetism seen by an Mn I line Arturo López Ariste

2. HFS: Reminder F=3 F=2 Mn I, Fine Structure: a 6 D ½ Mn I, Nucleus : I=2.5 F=I + J Zeeman effect on F,M F

3. HFS: Reminder F=3 F=2 Mn I, Fine Structure: a 6 D ½ F=I + J Zeeman regime

4. HFS: Reminder F=3 F=2 Mn I, Fine Structure: a 6 D ½ Paschen-Back Regime

5. Mn I @ 5537.7 Å F=3 F=2 Mn I a 6 D ½ F=1 F=2 F=3 F=4 Mn I y 6 P o 1½

6. Line synthesis Computation of atomic level energies: H ([J,I,F],B) = H hfs (J,I,F) + H Zeeman (B) Nuclear gyroscopic factor neglected No atomic polarization included Electric dipole transitions Milne-Eddington atmospheres assumed DIAGONAL code modified for hfs computation

7. Line synthesis

8. σ-transitions splitting

9. Stokes V simulation

10. ASP June ‘02

11. Mn Fe Mult 839: a 1 I 6 -w 5 G o 6 (g eff =1.166) Mult 1064: y 5 D o 1 -e 5 P 2 (g eff =2) Mult 871 : b 3 D 3 -Psp3 1 D o 2 (g eff =1.666)

12. Op 02: scan over quiet sun near disk center

13. The network: business as usual… 335 – 574 G

14. The network: business as usual… 445 – 764 G

15. The network: business as usual??? 142 – 243 G

16. The network: business as usual??? 214 - 367

17. About noise

18. The internetwork: adding up

19. 4.7 – 8.1 G

20. The internetwork: adding up

22. Inversion or bust? Doyle, Jevremovic, Short, Hauschildt, Livingston, & Vince A&A Letters. 369, 13 (2001)

23. Stokes V simulation

24. Ratio between lobes: a monotone function of field strength

26. A game ~ 1 arc-sec 500 G 1500 G α HFS α kG F T = α HFS ×500 + α kG ×1500

27. A game F T = α HFS ×500 + α kG ×1500

28. A game F T = α HFS ×500 + α kG ×1500 FTFT α HFS ×500 r 2.5 =

29. Results for the internetwork

30. Results for the (noisy) network