- ...unbiased
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The estimator 26#26 given Eq. (6 (click here))
is unbiased in the following sense.
Suppose a sample of N galaxies
homogeneously distributed in space and
with
the same measured m and p.
For N large enough, the distances average
on the sample 29#29 will coincide with the
estimator 26#26 (i.e. 30#30 where 31#31 is the
mathematical expectancy of r, given m and p).
The statistics of
Eq. (6 (click here)) is generally used for inferring
the distance of individual galaxies. It amounts
to apply the above statistical formalism on a sample
containing only one object, which cannot be done without
ambiguousness.
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- ...correct
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Note however that the converse does not hold
since the Hubble constant H0, DTF zero-point bD
and intrinsic DTF dispersion 12#12 degenerate
into a single parameter 169#169.
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- ...approach
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It can be proven similarly that 173#173 .
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- ...result
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It can be proven similarly that 193#193 .
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- ...R(r*)=0.25)
- The standard deviation 262#262
is proportional to R(r*)-1/2, as expected.
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- ...flow
- Since the real distance of MAT galaxies are not known, the
contribution of the radial peculiar velocity inferred
by GA flow model to observed redshift has been added
under the approximation that galaxies distances are given by their
observed redshifts.
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- ...catalog
- Since
the subsampling procedure in distance estimate depends on
the values of 257#257 and 258#258, few iterations
were performed in order to achieve the stable situation
presented in Fig. 7.
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- ...)
- Independently
to these velocity
bias problems, relative "zero-point"
estimator always suffer from an additional bias inherited
from the statistical uncertainties on the slope estimate
(i.e. 309#309.
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