Title  Magnetic field in molecular outflows
Pi     J. Richer
Time   168 hrs

 1. Name: Magnetic field in molecular outflows

    Authors: J Richer

 2. Science goal: Make images of linearly polarised CO emission in 
    molecular outflow sources to trace magnetic field direction in 
    flow (Goldreich Kylafis effect). 

3. Number of sources: 4

4. Coordinates: 

  4.1. 1 source in Oph      (RA=16:30, DEC=-24)
       2 sources in Taurus/Perseus (RA=03,  DEC=+30)
       1 in Orion (05h, 0d)

       Choose very compact outflows to fit mostly in primary beam - eg HH211,
       NGC2024-FIR5 

  4.2. Moving target: no

  4.3. Time critical: no

5.  Spatial scales:

  5.1. Angular resolution: 1.0"
       
  5.2. Range of spatial scales/FOV: 45 arcsec

  5.3. Single dish: maybe needed
 
  5.4. ACA: no

  5.5. Subarrays: no
 
6. Frequencies:

  6.1. Receiver band: Band 3

  6.2. Line: CO 1-0

  6.3. Spectral resolution (km/s): 3.0 km/s
  
  6.4. Spectral coverage (km/s or GHz): 200 km/s    

7. Continuum flux density:

  7.1. Typical value: N/A

  7.2. Continuum peak value: 

  7.3. Required continuum rms:

  7.4. Dynamic range in image:


8. Line intensity:

  8.1. Typical value: 1 K

  8.2. Required rms per channel: 28 mK
  
  8.3. Spectral dynamic range: 200

9. Polarization: yes - critical

10. Integration time:

    Need mosaic size  of about 7 fields for each object
    6 hours per field neeeded to get 28 mK


11. Total integration time for program: 168 hrs



Notes

Achieving 28 mK should be OK to detect few per cent polarisation in
lines about 3-10 K bright.

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Review Munetake Momose: OK.

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Review v2.0:
 
2.2.5 Richer  Magnetic field in molecular outflows 

(should say revised) the integration time should increase a little
given fewer dishes or the sensitivity is decreased by about 20 percent
but I don't think these are issues to worry about here