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Proposal Identification No.: A2705 Date Received: 2012­Mar­01 13:38:28
Technical Page
Proposal Type: Regular
General Category: Astronomy
Sub­Category: Continuum
Observation Category: Galactic
Total Time Requested: 13 Hours
Minimum Useful Time: 1.5h
Proposal Title: Density Map of the W51 Giant Molecular Cloud Complex
ABSTRACT:
We aim to map the volume density across the face of the W51 molecular cloud complex in order to determine how
massive star formation is progressing. W51 is the closest very massive proto­cluster in the Galaxy and is hosted in
one of the largest giant molecular cloud complexes. It has been mapped extensively at many wavelengths, including
in the 14.4 GHz H2CO 2­2 line with the GBT by our group. The proposed observations will allow us to construct
velocity­resolved density maps using the H2CO densitometer method, which will uniquely allow us to assess
models of gravitational collapse and turbulence.
Name Institution E­mail Phone Student
Adam Ginsburg University of Col­
orado
adam.ginsburg@colorado.edu 3036673805 G
Remote Observing Request
Observer will travel to AO
X Remote Observing
In Absentia (instructions to oper­
ator)
Instrument Setup
C
Atmospheric Observation Instruments:
Special Equipment or setup: none
RFI Considerations
1

Frequency Ranges Planned
4818 ­ 4840
4582 ­ 4604
5414 ­ 5586
5114 ­ 5286
4664 ­ 4836
4544 ­ 4716
4412 ­ 4584
2