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ALMA-IMF Kinematics Telecon - June 22nd, 2021

6/22/2021

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Kinematics WG activities

Attendees: Amy, Adam, Nichol, Rodrigo, Nicolas, Melanie, Leonardo, Thomas, Simon, Allison, Gemma
Not attending:  

Time: 12:00 UT 
(Morelia = UT - 5; Chile = EST = UT - 4; JST = UT + 9; CEST = UT + 2; …)

Join Zoom Meeting
https://reuna.zoom.us/j/83203745306 

Agenda items: 
  • TP combo progress!!  :D  
  • Rodrigo’s presentation: https://drive.google.com/file/d/1HG4bMdee65cmCTLc-76UWIo9qnwaGg41/view?usp=sharing
    • Several discussion points:
      • Is there a systematic shift between 7m12m / total power?
      • Are there localized shifts?
      • (Why) does the moment1 vary more than the moment2?
    • Overall combination looks very good
    • Difference in the beam size b/w 7m+12m and feather?
      • Power spectrum before vs after combination might help
      • https://turbustat.readthedocs.io/en/latest/tutorials/statistics/pspec_example.html
    • How quick is it?
      • <5m, and <1m when the TP is already regrided to the 7m12m dimensions
  • https://github.com/autocorr/nestfit 

To do’s: 
→ Possibly feather the W43-MM1 region, see if velocity patterns persist, Nichol to provide 7+12 data
→ Send G353 feathered and 7+12 versions to JF for MnGSeg analysis 
→ AMS to contact BS re:nestfit in G353 as an example, show us how to run?  
→ Did I miss more items??  


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ALMA-IMF Kinematics Telecon - June 8th, 2021

6/8/2021

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Kinematics WG activities

Attendees: Amy, Timea, Fred, Rodrigo, Allison, Daniel, Fabrice, Meliane, Nico, Roberto, Tapas, Nichol, Adam, Gemma
Not attending:  

Time: 12:00 UT 
(Morelia = UT - 5; Chile = EST = UT - 4; JST = UT + 9; CEST = UT + 2; …)

Join Zoom Meeting
https://reuna.zoom.us/j/83203745306 

Agenda items: 

  • TP combination update. 
Rodrigo: here are my slides for tomorrow 
https://drive.google.com/file/d/1nAXc93J4QfViMOc022BEhLVL4QuGnCNd/view?usp=sharing
  • Questions at the end were:
  • Any feedback on the error?
    • It is indicating that the startmodel cube is not the same shape
  • Feedback on feathering?
    • What does feather do? http://keflavich.github.io/blog/what-does-feather-do.html 
  • Any tests I should do?
    • Discussion of comparison of total flux in SD vs total flux in interferometer for a channel where we expect the interferometer to recover all flux (e.g., for a true point source).  Unclear if a true point source frame exists
    • Amy suggested power spectrum plots
      • (some examples from Adam: https://keflavich.github.io/talks/FeatheringPresentation/FeatheringPresentation.slides.html?transition=fast#/30 , https://github.com/keflavich/talks/blob/gh-pages/FeatheringPresentation/FeatheringPresentation.ipynb )
  • Suggested other software:
    • Tp2vis https://github.com/tp2vis/distribute 
    • https://github.com/radio-astro-tools/uvcombine (there are examples https://github.com/radio-astro-tools/uvcombine/tree/master/examples )
    • Paper: https://arxiv.org/pdf/1903.07611.pdf

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    Telecon calendar
    Time: 08:00 EST every 2 weeks on Tuesday

    Zoom meeting:
    https://reuna.zoom.us/j/83203745306

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