Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The I-Band Tully-Fisher Relation and the Hubble Constant   The application of the I band Tully--Fisher relation towards determining the
Hubble constant is reviewed, with particular attention to the impact of scatter
and bias corrections in the relation. A template relation is derived from
galaxies in 24 clusters. A subset of 14 clusters with cz ~ 4000 to 9000 km/s is
used as an inertial frame to define the velocity zero point of the relation.
Twelve galaxies with Cepheid distances are used to establish the absolute
magnitude scale of the Tully--Fisher relation, and thus to determine a value of
H_not = 70\pm5 km/s/Mpc. Estimates of the peculiar velocities of the Virgo and
Fornax clusters are also given. Assuming that the distance to Fornax is 18.2
Mpc (N1365), H_not = 76\pm8 km/s/Mpc. Assuming that Virgo lies at 17.4 Mpc
(M100, N4496, N4639), H_not = 67\pm8 km/s/Mpc.

31
The categories of this paper are: ao-sci
30
The categories of this paper are: q-alg
21
The categories of this paper are: adap-org
19
The categories of this paper are: eess
25
The categories of this paper are: patt-sol
33
The categories of this paper are: plasm-ph
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The categories of this paper are: q-fin
1
The categories of this paper are: cs
15
The categories of this paper are: nucl-ex
12
The categories of this paper are: nucl-th
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The categories of this paper are: supr-con
35
The categories of this paper are: mtrl-th
8
The categories of this paper are: hep-ex
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The categories of this paper are: solv-int
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The categories of this paper are: stat
9
The categories of this paper are: nlin