Statistics – Computation
Scientific paper
Feb 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993pasj...45...35m&link_type=abstract
PASJ: Publications of the Astronomical Society of Japan (ISSN 0004-6264), vol. 45, no. 1, p. 35-42.
Statistics
Computation
1
Astronomical Models, Disk Galaxies, Galactic Structure, Three Dimensional Models, Computational Astrophysics, Galactic Bulge, Luminosity
Scientific paper
We present a parameter set for a luminosity distribution model of NGC 3998 comprising an oblate-disk component following the exponential law and a prolate-bulge component following the r exp 1/4 law, which can reproduce the two-dimensional distribution of the observed brightness with an rms error of 0.29 mag/sq arcsec and the twist and axis ratio of the observed isophotes. The scale-length ratios were found to be 0.35 for the disk and 0.85 for the prolate bulge, with the inclination angle of the disk being i = 40 deg and the position angle of the prolate axis in the disk plane being phi = 110 deg relative to the line of sight. We confirmed the existence of a nonaxisymmetric bulge component, which has been predicted based on the twist and axis ratio of the observed isophotes.
Furukawa Satoshi
Mizuno Takao
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