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arXiv:astro-ph/9611115 (astro-ph)
[Submitted on 14 Nov 1996]

Title:Observational Constraints on the Origins of the Fundamental Plane

Authors:M. A. Pahre, S. G. Djorgovski (Palomar Observatory, Caltech)
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Abstract: We review the concept of the Fundamental Plane (FP), and present new results on the near-infrared FP. We show that the K-band FP differs both from the optical form and the virial expectation under the assumption of constant (M/L) and homology. Systematic variations of only the stellar populations parameters (age, metallicity, IMF) cannot reproduce the slopes of the FP simultaneously at both the optical and near-infrared wavelengths. There appears to be an additional effect which could be due to a systematic departure of the velocity distributions of elliptical galaxies from a homologous family. In order to distinguish between the different possible stellar populations parameters, the FP and its projections can be observed at a range of redshifts. We describe several such evolutionary tests: in the intercept of the color-magnitude relation; in the intercept of the Kormendy surface brightness-radius correlation; and in the intercept of the FP itself. All three tests are fully consistent with the population of cluster elliptical galaxies having formed at high redshift; this contradicts large, systematic age variations as a significant contributor to the slope of the FP.
Comments: Invited review, to appear in The Nature of Elliptical Galaxies, Proceedings of the Second Stromlo Symposium, eds. M. Arnaboldi, G. S. Da Costa, and P. Saha; 12 pages, including 6 embedded postscript figures; TeX file, requires input file this http URL (included); also available at this http URL
Subjects: Astrophysics (astro-ph)
Cite as: arXiv:astro-ph/9611115
  (or arXiv:astro-ph/9611115v1 for this version)
  https://doi.org/10.48550/arXiv.astro-ph/9611115

Submission history

From: Michael Pahre [view email]
[v1] Thu, 14 Nov 1996 20:29:14 UTC (116 KB)
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