ALMA-IMF Core Working Group, January 28 2021

Connection:
https://univ-grenoble-alpes-fr.zoom.us/j/98634272360?pwd=YkQ1ZVM5K2l4UUFPTkViYVNZRDFXZz09

Attendees: Fred, Sasha, Adam, Timea, HongLi, Mélanie, Fabrice, Nichol, Josh, Fabien, Nathalie, Leo, Yohan, Allison, Sylvain, Amy, Cara, Tapas, Mélisse
Not attending: 

For memory:
Minutes from our last telecon
Activities of the Core Working Group
Members and their main interests


Agenda:

1. Core temperature: News with NH3 fits

    Presentation by Josh Machado (UConn) on W51 NH3 results
NH3, 3’’ → T(NH3) of the cores surrounding (+ ALMA 0.2’’ @ 1mm)
Mean temperatures: 20K (SE or W51-E) 60K (W51-E) up to 120K (W51-IRS2)
Effect of the dynamic assumptions for temperature on the CMF: slightly steeper
Cores located on the extended free-free emission could correspond to chance alignment (no T measurements) or free-free peaks.
To remember: apply for more NH3 measurements at the VLA deadline for C configuration (later than August).

1. Core extraction softwares: The plus of GExt2D

GExt2D tends to detect more sources (real one from simulated observations) than getsf. → better for clustering studies
getsf seems to provide better flux estimates for the weakest sources. → better for mass studies

1. CMF results?

• Fab: I did not examine the new source catalogs (getsf and GExt2D)
  
• Yohan: final core catalog (after filtering free-free peaks and correcting for hot core line contamination of the continuum emission) ready → ~200 cores in W43-MM2&MM3
  
• Future CMF studies
  

    Mélanie: G12 (70 sources in cleanest image, most outside the HII region area)
Gemma: W51-E (more sensitive and larger area than the paper to be submitted by Josh+)
Hongli G353.41 (CMF, fragmentation)
Xing G327
    Nichol+Jeff?: on the denoised images by MnGSeg