Astrophysics, abstract
astro-ph/0309750
From: Jacek Choloniewski <estymator@gazeta.pl>
Date: Sat, 27 Sep 2003 21:11:15 GMT (107kb)
Extinction in the Galaxy from surface brightnesses of ESO-LV
galaxies: determination of A_R/A_B ratio
Authors: Jacek
Choloniewski, Edwin. A.
Valentijn
Comments: 14 pages, 9 figures, submitted to Acta Astronomica
A new method for the determination of the extinction in our Galaxy is
proposed. The method uses surface brightnesses of external galaxies in
the B
and R bands. The observational data have been taken from the ESO-LV
galaxy
catalogue. As a first application of our model we derive the ratio of R
band to
B band extinction. We introduce two methods for computing the ratio
which give:
0.62 $\pm$ 0.05 (the first method) and 0.64 $\pm$ 0.06 (the second
method)
which is in agreement with the recent literature value of 0.61. This
agreement
confirms the validity and efficiency of our model and is an independent
verification for the standard value of the "total to selective
extinction". The
method of extinction determination introduced in this paper will be
explored in
subsequent publications.
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