Statistics – Computation
Scientific paper
Jul 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...233...16c&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 233, no. 1, July 1990, p. 16-20. Research supported by SNSF.
Statistics
Computation
53
Computational Astrophysics, Elliptical Galaxies, Galactic Structure, Interstellar Matter, Spiral Galaxies, Absorption Spectra, Color-Magnitude Diagram, Self Absorption
Scientific paper
A sample of spiral and elliptical galaxies with known surface photometry was artificially absorbed. The newly calculated intensity profiles, resulting from an ever increasing artificial absorption, were then compared with the original ones and relationships between the absorption and a diameter reduction factor as well as a magnitude correction factor were established. These relationships differ according to galaxian type. For absorptions larger than one magnitude this additional correction due to the diameter reduction is significant. At an absorption of 3.5 mag, an elliptical galaxy will be additionally dimmed by 0.8 mag, a spiral galaxy by as much as 1.6 mag.
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