In article ,
writes:
the dwarf cat. III/235A in CDS Strsbourg seemed to be rigth

There's a catalog of 20602 white dwarfs at
http://vizier.u-strasbg.fr/viz-bin/V...I/235B/catalog

It is "A Catalogue of Spectroscopically Identified White Dwarfs
(Version May 2008)" by McCook G.P., Sion E.M. ApJS 121, 1 (1999)

Whatever is going on with them, it has nothing to do with cosmology
because these are all nearby objects.

A couple of things I notice in a very quick glance are that only a
tiny fraction of the stars have radial velocities at all, and at
least some of the velocities are negative. Most of the stars don't
even have V magnitudes listed in the catalog.

If there is any radial velocity effect, my _guess_ would be that the
sample is biased in position because of where the surveys happen to
exist. Objects in the first and third Galactic quadrants should have
negative radial velocities and objects in the second and fourth
quadrants positive, just a result of Galactic rotation. More
luminous objects will be on average more distant and therefore will
have on average higher absolute velocities, either positive or
negative. But this is all speculation -- as I say, I've not looked
very hard at the actual data.

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