1. Segunda parte

2. IRAS Vela Shell

3. IRAS 100µ (30° x 30°)  Pup  Vel Feitzinger & Stüwe 1984 Fig. 1 14°x14°

4. Pereyra & Magalhães 04

5. Pereyra & Magalhães 06

7. Chandrasekhar & Fermi 51 Estimating Magnetic Fields ρ : density ν : turbulent velocity Δθ: polarization angle dispersion

8. Pereyra & Magalhães 06 B = 18 ± 13 μG

9. Evaluating Mass-to-Magnetic flux ratio (M / Φ) crit : critical value for the mass can be supported by a magnetic flux N (H 2 ) : H 2 column density Crutcher 2004 λ < 1 subcritical regime, magnetic support prevents collapse and star formation

10. Pereyra & Magalhães 06 Results support subcritical regime

11. Lupus Dark Cloud Alves & Franco 06

12. Sigue tercera parte