Statistics – Computation
Scientific paper
Jan 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...209....8m&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 209, no. 1-2, Jan. 1989, p. 8-14.
Statistics
Computation
12
Cosmic Dust, Galactic Radiation, Interstellar Matter, Optical Polarization, Spiral Galaxies, Astronomical Models, Computational Astrophysics, Light Scattering, Optical Thickness, Polarimetry, Three Dimensional Models
Scientific paper
The properties of the polarization due to light scattering by dust in a spheroidal galaxy, modeled on the Sombrero (M104), are studied. The pattern of polarizations in the outer region of the galaxy is found to be almost circular, while the polarization near the center is perpendicular to the major axis of the galaxy. This indicates that the influence of the shape of the galaxy on polarization becomes appreciable near the center of the galaxy. The results are compared with the observation of M104 by Scarrott (1987), and the upper limit of mass of cool gas is estimated to be 0.7-2 x 10 to the 8th solar masses in the spheroidal part where the surface brightness in the B band is brighter than 23.0 mag/sq arcsec. The radial distribution of dust in the disk is also obtained from the polarization observed along the major axis of the galaxy.
Matsumura Masahiro
Seki Midori
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