New estimates of scale heights and spiral structures for non-edge-on spiral galaxies

Tao Hu, Qiu-He Peng

Abstract


On the basis of Poisson’s equation for the logarithmic perturbation of matter density, we provide improved estimates of scale heights and spiral structures for non-edge-on spiral galaxies by subtracting the surface brightness distributions from observed images. As examples, the non-edge-on spiral galaxies PGC 24996, which is face-on, and M31, which is inclined, are studied. The scale height, pitch angle and inclination angle of M31, our nearest neighbor, that are presented in this work, agree well with previous research.


Keywords


galaxy: disk — galaxies: fundamental parameters — galaxies: spiral — galaxies: structure

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Print ISSN: 1674-4527

Online ISSN: 2397-6209