Photometry of the spiral pair NGC 450/UGC 807 and the optical thickness of galactic disks

Details Photometry of the spiral pair NGC 450/UGC 807 and the optical thickness of galactic disks Photometry of the spiral pair NGC 450/UGC 807 and the optical thickness of galactic disks

Nov 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...265..396a&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 265, no. 2, p. 396-402.

Astronomy and Astrophysics

Astrophysics

24

Astronomical Photometry, Galactic Structure, Interacting Galaxies, Optical Thickness, Spiral Galaxies, Absorption Spectra, Brightness Distribution, Charge Coupled Devices, Luminosity

Scientific paper

CCD images of the non-interacting spiral pair NGC 450 and UGC 807 in B, V, R, and I filters were used to perform photometry on these two Sb spirals. The goal was to determine the absorption suffered by UGC 807 because of the presence of the disk of NGC 450 in the foreground. The color variations observed, the comparison of the observed absolute magnitude to the absolute magnitude calculated via the Tully-Fisher relation, and the application of Freeman's law, indicate that the absorption is totally negligible, at least in the outer parts of the disk.

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