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Issue A&A
Volume 378, Number 2, November I 2001
Page(s) 428 - 440
Section Extragalactic astronomy
DOI http://dx.doi.org/10.1051/0004-6361:20011208



A&A 378, 428-440 (2001)
DOI: 10.1051/0004-6361:20011208

Statistical study of M 51-type galaxies

S. A. Klimanov1 and V. P. Reshetnikov1, 2

1  Astronomical Institute of St. Petersburg State University, 198504 St. Petersburg, Russia
2  Isaac Newton Institute of Chile, St. Petersburg Branch, Russia

(Received 23 August 2000 / Accepted 12 July 2001 )

Abstract
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.


Key words: galaxies: evolution, general, interactions, photometry, peculiar, spiral

Offprint request: V. P. Reshetnikov, resh@astro.spbu.ru

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© ESO 2001


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