6-arm blue grand design of NGC 309
Astrophysics of Galaxies
2015-03-17 v2
Abstract
The geometry and physics of the spiral structure of the giant Hubble type Sc galaxy NGC 309 is studied. A schematic of two patterns with three arms in each is suggested for the blue spiral. The red and blue patterns form together a grand design with two-fold symmetry. A possible gas-dynamics explanation of the phenomenon is suggested which shows how the two-arm red spiral may induce the formation of the six-arm coherent blue spiral. Key words: galaxies: individual (NGC 309) -- galaxies: spiral
Keywords
Cite
@article{arxiv.1503.03764,
title = {6-arm blue grand design of NGC 309},
author = {A. D. Chernin},
journal= {arXiv preprint arXiv:1503.03764},
year = {2015}
}
Comments
AApTr 28, #4,381-386, 2014