Arm structure in normal spiral galaxies, 1. Multivariate data for 492 galaxies

Details Arm structure in normal spiral galaxies, 1. Multivariate data for 492 galaxies Arm structure in normal spiral galaxies, 1. Multivariate data for 492 galaxies

Sep 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994aj....108..896m&link_type=abstract

The Astronomical Journal, vol. 108, no. 3, p. 896-912

Astronomy and Astrophysics

Astronomy

24

Astronomical Photometry, Astronomical Spectroscopy, Classifications, Galactic Structure, Infrared Astronomy, Luminosity, Morphology, Multivariate Statistical Analysis, Red Shift, Spiral Galaxies, Charge Coupled Devices, Color, Far Infrared Radiation, Hydrogen, Monatomic Gases, Samples, Tables (Data)

Scientific paper

Multivariate data have been collected as part of an effort to develop a new classification system for spiral galaxies, one which is not necessarily based on subjective morphological properties. A sample of 492 moderately bright northern Sa and Sc spirals was chosen for future statistical analysis. New observations were made at 20 and 21 cm; the latter data are described in detail here. Infrared Astronomy Satellite (IRAS) fluxes were obtained from archival data. Finally, new estimates of arm pattern radomness and of local environmental harshness were compiled for most sample objects.

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