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B and R Surface Photometry of Faint Galaxies in the Area of Three Cosmic Voids

Published online by Cambridge University Press:  25 May 2016

J. Vennik
Affiliation:
Tartu Observatory, EE2444 Tartu, Estonia
B. Kovachev
Affiliation:
Astronomical Institute, 1784 Sofia, Bulgaria
U. Hopp
Affiliation:
Universitätssternwarte München, D 81679 München, FRG
B. Kuhn
Affiliation:
MPI für Astronomie, D 69117 Heidelberg, FRG

Extract

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We performed B and R surface photometry of 92 faint mostly late type galaxies, selected towards three nearby voids (Hopp et al., 1995 A&AS 109, 537). CCD frames were taken with the Calar Alto 3.5m telescope and with the MPIA/ESO 2.2m telescope. We calculated the azimuthally averaged equivalent profiles, asymtotic total magnitudes and colours, and performed ellipse-fitting of isophotes. Observed light profiles were fitted with a power law μ = μ0 + 1.086αr 1/n . About 40% of profiles are pure exponentials (n = 1); 38% of the profiles reveal a bulge/disk or disk/disk composition; 20% of them show central light depression. We classified the nearby galaxies (z ≤ 0.04) as being related either to clusters (11 galaxies), to sheets (23) or to voids (9). The obtained parameters are compared to those of HSB and of LSB field galaxies.

Type
Poster Papers
Copyright
Copyright © Kluwer 1996