This started out as a post eDR3 exercise trying to compare the (updated) OBA stars map in the 5kpc around us (Zari+20), with (low-mass) YSO maps extending to 3kpc.
To do the YSOs, I essentially used W1-W2>0.2, absmag(W1)<3.5 parallax>0.3 (and G<17 and parallax_error<0.12) and G-band variability > 0.02mag (all Gaia from eDR3).
The resulting sample (in translucent red; initially without the absW2<3.5-cut) gets some further CMD cuts to eliminate evolved giants, M-dwarfs etc.. as illustrated here:
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There is a long dense-gas feature in the Galactic solar neighbourhood, called the Radcliff Wave
This results in the following map:
which meshes nicely with the OBA star map:
Note the distinct differences, which must be related to a) age and b) high-mass/low-mass SFR differences.
The map seems to show the Radcliffe Wave in YSOs extending over ~4 kpc, with also a coherent Z-structure.
HWR is excited about this, as this may offer the possibility to get the full kinematics (at least the vertical ones) of the Radcliffe wave. HWR has not kept up whether recent papers have done similar things.
