Mathematics – Logic
Scientific paper
Feb 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998ycat..72741107n&link_type=abstract
VizieR On-line Data Catalog: J/MNRAS/274/1107. Originally published in: 1995MNRAS.274.1107N
Mathematics
Logic
Galaxy Catalogs, Morphology
Scientific paper
We investigate the consistency of visual morphological classifications of galaxies by comparing classifications for 831 galaxies from six independent observers. The galaxies were classified on laser print copy images or on computer screen using scans made with the Automated Plate Measuring (APM) machine. Classifications are compared using the Revised Hubble numerical type index T. We find that individual observers agree with one another with rms combined dispersions of between 1.3 and 2.3 type units, typically about 1.8 units. The dispersions tend to decrease slightly with increasing angular diameter and, in some cases, with increasing axial ratio (b/a). The agreement between independent observers is reasonably good but the scatter is non-negligible. In spite of the scatter, the Revised Hubble T system can be used to train an automated galaxy classifier, e.g. an artificial neural network, to handle the large number of galaxy images that are being compiled in the APM and other surveys. (6 data files).
Buta Ronald J.
Corwin Harold G. Jr.
de Vaucouleurs Gerard
Dressler Alan
Huchra John P.
No associations
LandOfFree
Morphological classifications of APM galaxies (Naim+ 1995) does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Morphological classifications of APM galaxies (Naim+ 1995), we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Morphological classifications of APM galaxies (Naim+ 1995) will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1648746