Thickness determination of three dimensional spiral galaxy

Details Thickness determination of three dimensional spiral galaxy Thickness determination of three dimensional spiral galaxy

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992acasn..33..371s&link_type=abstract

Acta Astronomica Sinica (ISSN 0001-5245), vol. 33, no. 4, p. 371-382.

Mathematics

Logic

4

Spiral Galaxies, Thickness, Three Dimensional Bodies, Astronomical Photometry, Charge Coupled Devices, Error Analysis, Image Processing, Telescopes

Scientific paper

CCD images of some spiral galaxies were obtained with a 1 m telescope in Yunnan Observatory. After processing and measuring the images with a computer, we obtained the morphological parameters, thickness, and relative errors of seven spiral galaxies (NGC2608, NGC2713, NGC2776, NGC3631, NGC5669, NGC5985 and NGC7156) by fitting their spiral arms with logarithmic spirals. This method is the only one to be generally applicable for measuring the thickness of most spiral galaxies.

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