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The Opacity of Spiral Galaxy Disks: dust opacity from calibrated counts of distant galaxies
B. W. Holwerda, R. A. Gonzalez, Ronald J. Allen +1
The opacity of foreground spiral disks can be probed from the number of distant galaxies seen through them. To calibrate this number for effects other than the dust extinction, Gon…
Total Opacity of Local Group Galaxies and Large Scale Structure behind the Galactic Bulge
Rosa A. Gonzalez, Benne Holwerda, Laurent Loinard +2
Recently, we have developed and calibrated the Synthetic Field Method to derive total extinction through disk galaxies. The method is based on the number counts and colors of dista…
The Opacity of Spiral Galaxies from Counts of Distant Background Galaxies
B. W. Holwerda, R. A. Gonzalez, R. J. Allen +1
We have applied the "Synthetic Field Method" on a sample of ~20 nearby galaxies in order to determine the opacity of their disks. We present preliminary results on the radial depen…
Automating the Synthetic Field Method:Application to Sextans A
Benne W. Holwerda, Ronald J. Allen, Pieter C. van der Kruit
We have automated the ``Synthetic Field Method'' developed by Gonzalez et al.(1998) and used it to measure the opacity of the ISM in the Local Group dwarf galaxy Sextans A by using…