1. INTRODUCTION

2. OBSERVATIONS

3. RESULTS

3.2. Velocity dispersion in OMC 1

3.3. Volume density of OMC 1

3.4. Magnetic field strength in OMC 1

4. ENERGETICS CALCULATIONS

4.3. Gravitational potential energy of OMC 1

4.4. Energy density of the BN/KL outflow

4.5. Alfvén velocity in OMC 1

4.6. Kinetic energy in OMC 1

5. DISCUSSION

5.1. Interaction of the magnetic field and the BN/KL outflow

5.2. Interaction of the magnetic field and the gravitational potential

5.3. Comparison with existing measurements

5.4. Choice of Q' parameter

6. CONCLUSIONS