VizieR Online Data Catalog: Morphological properties of galaxies (Karachentsev+, 2018)
Abstract
We have considered the influence of an environment on global properties of galaxies: the neutral hydrogen abundance, star formation rate, morphological type, and average surface brightness. The sample used contains 1029 galaxies within the sphere of 11Mpc radius around the Milky Way. The bulk of this sample, ~85 per cent, comprises dwarf galaxies most exposed to external action due to their shallow potential well.
To characterize an environment, we used two parameters: the density contrast θ1 provided by the most significant neighbour, and the local density excess θj within 1-Mpc distance around a galaxy taken relative to the average cosmic density. Variations in the values of the parameters θ1 and θj exceed five orders of magnitude. The hydrogen-to-stellar mass ratio of a galaxy reveals a weak effect of the HI deficiency in high-density regions being most noticeable in the case of low-mass irregular dwarfs. (1 data file).- Publication:
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VizieR Online Data Catalog
- Pub Date:
- November 2021
- Bibcode:
- 2021yCat..74794136K
- Keywords:
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- Galaxies: nearby;
- Galaxies: photometry;
- Optical