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Proposal Identification No.: A2268 Date Received: 2006 ­Oct­02 15:19:03
Technical Page
Proposal Type: Regular
General Category: Astronomy
Sub­Category: Continuum
Observation Category: Extragalactic
Total Time Requested: 6 Hours
Minimum Useful Time: 30
Proposal Title: Determining the synchrotron contribution to the submm flux of galaxines in the
SCUBA Local Universe Galaxy SurveyM
ABSTRACT:
We propose using 6 hours of Arecibo time to measure the synchrotron contribution to the submillimeter (submm)
emission of galaxies in the SCUBA Local Universe Galaxy Survey. The submm flux is used to compute the cold
dust mass in these galaxies, which form a zero­redshift data point for models of galaxy evolution. However, the
submm flux may not be solely due to dust but may also include CO (3­2) and continuum synchrotron emission. We
will characterise the SED over 2­10 GHz at Arecibo, and will then be able to extrapolate the synchrotron emission
to 0.85 mm. By determining the proportion of submm flux due to synchrotron over a number of galaxies, we will
be able to find the e#ect of synchrotron emission on estimates of the dust mass in these galaxies and on the dust
mass function derived from them.
Name Institution E­mail Phone Student
Robert F Minchin Arecibo Observatory rminchin@naic.edu 1­787­878­
2612x283
no
Remote Observing Request
X Observer will travel to AO
Remote Observing
In Absentia (instructions to oper­
ator)
Instrument Setup
C S­low X­high S­high C­high
Atmospheric Observation Instruments:
Special Equipment or setup: none
1

RFI Considerations
Frequency Ranges Planned
1980­2780
3100­3900
4450­5250
6600­7400
8600­9400
2