An Investigation into the mp Scale of Volume I of Zwicky et al.'s
Catalog of Galaxies and Clusters of Galaxies
Christopher Ke-shih Young and Zheng-yi Shao, PASA, 18 (2), in press.
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Conclusions
For Volume I of the CGCG3, we have found that:(1) over the magnitude range
, mp values are B-band and isophotal in nature and correspond to B24.4 with a scatter of only 0.16 mag.;
(2) even after transformation, mp values are relatively poor measures of Bt owing to the fundamentally different natures of the mp and Bt scales;
(3) whether mp values are treated as B24.4 or Bt, due to the presence of scale errors, galaxy luminosities are seriously under-estimated at the bright end (
) and seriously over-estimated at the faint end (
);
(4) the catalogue is complete only to 
mag.;
(5) over the range
, the degree of incompleteness is relatively constant at about the 30% level; and
(6) most of the omitted objects are elliptical galaxies implying that late types are over-represented at the faint end.
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Title/Abstract Page: Total Magnitudes of Virgo
Previous Section: Estimating mp from Bt
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