Journal
ASTRONOMY LETTERS-A JOURNAL OF ASTRONOMY AND SPACE ASTROPHYSICS
Volume 26, Issue 5, Pages 277-284Publisher
PLEIADES PUBLISHING INC
DOI: 10.1134/1.20392
Keywords
galaxies; groups and clusters of galaxies; intergalactic gas
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Numerical simulations of the disruption of a dwarf companion moving in the polar plane of a massive galaxy are presented. The constructed model is compared with observational data on the recently discovered low-surface-brightness stellar ring around the galaxy NGC 5907. Constraints on the ring lifetime (less than or equal to 1.5 Gyr after the first approach of the galaxies), on the structure of the companion-the ring precursor, and on the mass of the dark halo of the main galaxy in whose gravitational field the companion moves are provided. The dark-halo mass within 50 kpc of the NGC 5907 center cannot exceed 3 or 4 visible masses. (C) 2000 MAIK Nauka/Interperiodica.
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