Statistics – Computation
Scientific paper
Jun 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...317..637k&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 317, June 15, 1987, p. 637-645. Research supported by Columbia University.
Statistics
Computation
130
Astronomical Photometry, Cosmic Dust, Light Transmission, Spiral Galaxies, Computational Astrophysics, Interstellar Matter
Scientific paper
A method for determining the dust distribution in edge-on, late Hubble type, spiral galaxies from their surface photometry is described. The method assumes that both the stars and the dust are distributed isothermally in the direction perpendicular to the galactic plane with scale heights z(s) and z(d) respectively, and exponentially in the radial direction with corresponding scale lengths h(s) and h(d). By comparing the observed surface photometry and the model calculations in which the radiative transfer is treated properly, z(s), z(d), h(s), and h(d) can be determined, as well as the optical depth along the line of sight and the central brightness. As a demonstration, the method is applied to NGC 891. The extension of the method to early-type spiral galaxies and to inclination angles less than 90 deg is described.
Bahcall John N.
Kylafis Nikolaos D.
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