Statistical study of M 51-type galaxies

Details Statistical study of M 51-type galaxies Statistical study of M 51-type galaxies

Nov 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001a%26a...378..428k&link_type=abstract

Astronomy and Astrophysics, v.378, p.428-440 (2001)

Astronomy and Astrophysics

Astrophysics

9

Galaxies: Evolution, General, Interactions, Photometry, Peculiar, Spiral

Scientific paper

We present a statistical analysis of a new sample of M 51-type galaxies. Using the MCG and VV catalogues, we selected 32 such binary systems. We found that a typical M 51-type pair consists of a bright L* spiral galaxy and a satellite with blue luminosity 1/30-1/3 of the primary one. The main galaxies in such pairs are often barred and have two well-defined spiral arms. M 51-type systems show an enhanced star formation rate (from FIR luminosities). We found a weak dependence of the star formation rate of the system on relative luminosity of the companion. M 51-type galaxies are relatively frequent: about 1/12 of all pairs are of M 51-type.

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