I've uploaded some of the simulations done at the EU (for M100, moved to higher z to fit into a single beam).

The image shows:

top row [extended case]: ALMA 32-6 configuration (8hours) + ACA (8hours)
bottom row [compact case]: ALMA 32-3 configuration (8hours) + ACA (16hours).

Details on the simulation:

The total CO(1-0) flux of M100 is ~2400 Jy km/s (Chung et al. 2009, ApJS, 184, 199) and
its apparent optical diameter is ~500 arcsec at a distance of 17 Mpc (Gavazzi et al. 1999).
In order to fit M100 into the ALMA primary beam in Band 3, we redshifted the galaxy
to z~0.05. This implies and apparent size of ~42 arcsec and
a flux of 15 Jy km/s.
[In details, the flux has been rescaled as
(Di/Df)* 2 (1+zf)/(1+zi) ==> (17/220)^2 * (1.05/1.004) ==> 0.006245]

We used the OT to define the set-up of the simulation.
The central frequency is 109.782 GHz and the channel Spacing 488.281 kHz
(~1.33 km/s).
Thus, assuming a velocity width for M100 of 260 km/s, this implies
that the flux is spread over 196 channels and that the flux-per-channel is thus 0.077 Jy.

An IRAC 8 micron image has been the starting point for the creation of
the input image. We rescaled the image so that the total integrated
flux of the galaxy is 0.077 Jy, and then we created a cube composed of

196 replications of the rescaled input image.

-- CarolLonsdale - 2012-01-05

This topic: ALMA > WebHome > NAASC > UserSupportGroup > PastMinutes > USG2012Jan5Agenda > M100Description
Topic revision: 2012-01-05, CarolLonsdale
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