Statistical study of M 51-type galaxies

Citation
Sa. Klimanov et Vp. Reshetnikov, Statistical study of M 51-type galaxies, ASTRON ASTR, 378(2), 2001, pp. 428-440
Citations number
31
Categorie Soggetti
Space Sciences
Journal title
ASTRONOMY & ASTROPHYSICS
ISSN journal
14320746 → ACNP
Volume
378
Issue
2
Year of publication
2001
Pages
428 - 440
Database
ISI
SICI code
1432-0746(200111)378:2<428:SSOM5G>2.0.ZU;2-L
Abstract
We present a statistical analysis of a new sample of M 51-type galaxies. Us ing 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 galaxi es 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 r elative luminosity of the companion. M 51-type galaxies are relatively freq uent: about 1/12 of all pairs are of M 51-type.