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Investigating the Scatter in the V26 – log σ relation

Published online by Cambridge University Press:  04 August 2017

Michael Gregg  and
Alan Dressler
Michael Gregg
Affiliation:
Mt. Wilson and Las Campanas Observatories, 813 Santa Barbara St., Pasadena, CA 91101, USA
Alan Dressler
Affiliation:
Mt. Wilson and Las Campanas Observatories, 813 Santa Barbara St., Pasadena, CA 91101, USA

Abstract

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The nature and existence of a second parameter needed to characterize the family of normal elliptical galaxies has been much discussed. The need for a second parameter has been demonstrated by the correlation of the residuals from the well–known magnitude–velocity dispersion relation for ellipticals with other observables such as ellipticity, mass–to–light ratio and Mg line strength or metallicity. Here, evidence for a correlation between residuals in the V26 – log σ relation and the strength of Hβ is presented, suggesting that variations in the stellar populations in Virgo elliptical cores may be an important secondary parameter.

Type
Posters
Information
Symposium - International Astronomical Union , Volume 127: Structure and Dynamics of Elliptical Galaxies , 1987 , pp. 387 - 388
Copyright
Copyright © Reidel 1987 

References

REFERENCES

Dressler, A., 1984. Ap. J., 281, 512.CrossRefGoogle Scholar
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