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Proposal Identification No.:

A2268

Date Received: 2006 -Oct-02 15:19:03

Technical Page
Proposal Type: General Category: Sub-Category: Observation Category: Total Time Requested: Minimum Useful Time: Prop osal Title: 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 zero-redshift data point for models of galaxy evolution. However, the submm flux may not be solely due to dust but may also include CO (3-2) and continuum synchrotron emission. We will characterise the SED over 2-10 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 effect of synchrotron emission on estimates of the dust mass in these galaxies and on the dust mass function derived from them.

Regular Astronomy Continuum Extragalactic 6 Hours 30

Determining the synchrotron contribution to the submm flux of galaxines in the SCUBA Local Universe Galaxy SurveyM

Name Robert F Minchin

Institution Arecibo Observatory

E-mail rminchin@naic.edu

Phone 1-787-8782612x283

Student no

Remote Observing Request

X

Observer will travel to AO Remote Observing In Absentia (instructions to operator)

Instrument Setup
C S-low X-high S-high C-high

Atmospheric Observation Instruments:

Sp ecial Equipment or setup:

none 1


RFI Considerations Frequency Ranges Planned
1980-2780 3100-3900 4450-5250 6600-7400 8600-9400

2