Astronomisches Rechen-Institut Heidelberg

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ARI-Heidelberg Mitteilungen Serie A, No. 23

Author(s): Wielen, R.
Title: Zeitliche Helligkeitsänderungen von elliptischen Galaxien
Source: Z. Astrophys. 59, 129-135
Year: 1964
Abstract: The temporal change in the bolometric magnitude of elliptical galaxies has been computed by using a homology postulate for the evolutionary tracks of stars and assuming that all stars in the galaxy have nearly the same age. Thus knowledge of the exact form of the evolutionary track is unnecessary. It follows Mbol = 0.m096/(109alpha) for the temporal change of the bolometric magnitude of an elliptical galaxy with an age of t = 1010 a. Cosmological consequences are demonstrated for the magnitude-redshift-relation. The correction of Baum's observations changes the resulting sign of the space curvature and leads to q0corr = 0.1 instead of q0uncorr = 1.0.
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