Re: Galaxies without dark matter halos?

greywolf42 wrote:

>Ulf Torkelsson <[EMAIL PROTECTED]> wrote in message
>news:[EMAIL PROTECTED]
>>No, the Tully-Fisher scheme has never been calibrated based on the
>>Hubble constant, that is plainly wrong. There are also more distance
>>indicators than the Cepheids.
>
>
>Well, yes.  But the Cepheids provide the largest non-redshift assumption
>distance scale.

  This is simply incorrect. The cepheids can be, and have been, used
to calibrate other distance indicators such as the sizes of the
largest HII-regions of the galaxies, the brightnesses and sizes of the
brightest galaxies in clusters of galaxies, the Tully-Fisher relation
and so on. None of these distance scales will then depend on the value
of Hubble's constant as you have claimed.

Ulf Torkelsson

[Mod. note: reformatted -- mjh]