New estimates of scale heights and spiral structures for non-edge-on spiral galaxies |
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| Authors: | Tao Hu, Qiu-He Peng |
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| Affiliation: | [1]Department of Automation, Shanghai University, Shanghai 200072, China; [2]Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy ofSciences, Yunnan Observatories, Kunrning 650011, China; [3]Department of Astronomy, Nanjing University, Nanjing 210093, China |
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| 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. |
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| Keywords: | galaxy： disk -- galaxies： fundamental parameters -- galaxies： spiral --galaxies： structure |
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