The population of hot subdwarf stars studied with Gaia -- IV. Catalogues
  of hot subluminous stars based on Gaia EDR3
  In light of substantial new discoveries of hot subdwarfs by ongoing
spectroscopic surveys and the availability of the Gaia mission Early Data
Release 3 (EDR3), we compiled new releases of two catalogues of hot subluminous
stars: The data release 3 (DR3) catalogue of the known hot subdwarf stars
contains 6,616 unique sources and provides multi-band photometry, and
astrometry from Gaia EDR3 as well as classifications based on spectroscopy and
colours. This is an increase of 742 objects over the DR2 catalogue. This new
catalogue provides atmospheric parameters for 3,087 stars and radial velocities
for 2,791 stars from the literature. In addition, we have updated the Gaia Data
Release 2 (DR2) catalogue of hot subluminous stars using the improved accuracy
of the Gaia EDR3 data set together with updated quality and selection criteria
to produce the Gaia EDR3 catalogue of 61,585 hot subluminous stars,
representing an increase of 21,785 objects. The improvements in Gaia EDR3
astrometry and photometry compared to Gaia DR2 have enabled us to define more
sophisticated selection functions. In particular, we improved hot subluminous
star detection in the crowded regions of the Galactic plane as well as in the
direction of the Magellanic Clouds by including sources with close apparent
neighbours but with flux levels that dominate the neighbourhood.
