Optical and HI properties of isolated galaxies in the 2MIG catalog. I. General relationships
Yu. N. Kudrya, V. E. Karachentseva, and I. D. Karachentsev
TL;DR
This study investigates the relationships between optical, infrared, and HI properties of isolated galaxies in the 2MIG catalog, providing empirical data to test galaxy formation theories.
Contribution
It presents new empirical relationships among various galaxy characteristics, aiding in the validation of hierarchical galaxy formation models.
Findings
Identified correlations between galaxy morphology and HI content.
Derived regression models for galaxy properties.
Provided data supporting hierarchical galaxy formation theories.
Abstract
We analyze empirical relationships between the optical, near infrared, and HI characteristics of isolated galaxies from the 2MIG Catalog covering the entire sky. Data on morphological types, K_S-, and B-magnitudes, linear diameters, HI masses, and rotational velocities are examined. The regression parameters, dispersions, and correlation coefficients are calculated for pairs of these characteristics. The resulting relationships can be used to test the hierarchical theory of galaxy formation through numerous mergers of cold dark matter.
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