Use cases for SPH-EXA Simulation & Karabo Integration (ZHAW & University of Zurich)

[rohitcbscient]

Possible integration of the karabo with SPH-EXA Simulation.

1. Extra-Galactic Foreground
2. Studying Confusion limit in HI observations
3. For z=0 simulation mock data
4. Simulating observation of radio lobes for data challenge 3 (Michele)

Challenge: Radiative transfer does not exist and needs to be developed.

[sfiruch]

We can either
a) integrate SPH-EXA directly and let Karabo execute SPH-EXA simulations, or
b) just make it easy to use SPH-EXA data products.

@rohitcbscient Do we expect users to execute SPH-EXA from Karabo (A)? Or will users run SPH-EXA once and only process the data with Karabo (B)? What benefits could we offer for case A?

[rohitcbscient]

In the meeting with @phdenzel we chart down the plan of action. After reading in using illustrious TNG and applying the projection using pylions3, he wants to simulate a single galaxy.

1. From the output products of SPH, we now have the brightness temperature spatial distribution of the galaxy.
2. We can start from these maps, provided in hdf5 format, and convert them into flux density maps.
3. We would assign user-defined ra-dec to the galaxy and its extended components.
4. The flux densities can be plugged into the sky model of karabo, and mock outputs can be generated.
5. In the karabo data products, we can have 3-D data cubes, and flux density input maps(for debugging).
   In principle, we can give multiple galaxies by computing relative positions for the future.

[phdenzel]

Just a few details:

• I work mostly with the illustrisTNG simulations
• reading the simulations with illustris_python
• projections onto 2D images with Pylians3
• I package my images into a multi-class image HDF5 file (I will provide Rohit with a link to it by the end of the week)

It would be nice to have a karabo interface which reads in brightness temperature maps from the HDF5 file and builds a skymodel from these, given additional parameters such as RA,Dec, reference frequency, and spectral index.