Title  Density and temperature profile in high-mass cores
Pi     A. Bacmann
Time   155 hrs
Name: Density and temperature profile in high-mass cores
      ==================================================
A. Bacmann, A. Dutrey, ...

2. Science goal: to map the high mass cores at distances between 1 and 10 kpc 
in order to derive density and temperature profiles. The aim is to reach
similar/better linear resolution for sources at 1-5 kpc as those obtained by
present day single dish telescopes. Density profiles will be derived from
continuum observations. A combination of transitions of formaldehyde (H2CO)
will be used to derive temperature profiles, following Magum & Wootten (1993).
The transitions can be observed in a single receiver setting.

3. Number of sources: 10 Galactic sources in various high-mass star forming clouds. Distances 1 - 10 kpc

4. Coordinates

4.1. RA & DEC
M17: RA 18 DEC -16
Cygnus: RA 20 DEC +30
Sagittarius: RA 18 DEC -25
Monoceros: RA 07 DEC -06
NGC2264: RA 06:30 DEC +10
+ others
4.2. moving target: no
4.3. Time critical: no

5. Spatial scales
5.1 angular resolution: 0.5" 
5.2 FOV: ~ 100" x 100" (5x5 mosaic) for 1-5 kpc sources, 
small mosaic (3x3) for 10 kpc sources. 
5.3 total power: yes
5.4 ACA: yes
5.5 subarrays: no

6. Frequencies
6.1 Frequency band: 7 
6.2 Line and Frequencies (GHz):
H2CO(505-404):362.7 GHz
H2CO(524-423):363.9 GHz
H2CO(542-441):364.1 GHz
H2CO(533-432), H2CO(532-431):364.3 GHz
H2CO(523-422): 365.4 GHz
6.3 Spectral resolution: 0.5 - 1 km/s 
6.4 Bandwidth/Spectral coverage: 50-100 km/s

7. Continuum flux density
7.1 Typical value (Jy)  0.2 Jy
7.2 Required rms 0.02 Jy
7.3 Dynamic range within image 

8. Line intensity
8.1 typical value: 1 K in H2CO(5-4)
8.2 required rms per channel: 0.1 K 
8.3 spectral dynamic range

9. polarisation: no

10. integration time per setting
1.5 hours per field in 5x5 mosaics, ie 37.5 h/source
1 hour per field in 3x3 field, ie 9h/source

11. total integration time for program: 
5 sources with 5x5 mosaics, 110 h
5 sources with 3x3 mosaics, 45 h

************************************************************************

Review John Richer: see program 2.1.1.









--------------------------------------------------
Review v2.0:
 
init_4 = 2.1.4

Name: Density and temperature profile in high-mass cores
      ==================================================
A. Bacmann, A. Dutrey, ...

Unchanged w.r.t. DRSP 1.1. 7m x 12m correlations may be useful to
increase sensitivity.