The evolutionary history of early-type galaxies as derived from the fundamental plane

Details The evolutionary history of early-type galaxies as derived from the fundamental plane The evolutionary history of early-type galaxies as derived from the fundamental plane

Mar 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001ap%26ss.276..983p&link_type=abstract

Astrophysics and Space Science, v. 276, Issue 2/4, p. 983-990 (2001).

Astronomy and Astrophysics

Astrophysics

6

Scientific paper

The fundamental plane (FP) scaling relations and their evolution are a powerful tool for studying the global properties of early-type galaxies and their evolutionary history. The form of the FP, as derived by surveys in the local Universe at wavelengths ranging from the U to the K band, cannot be explained by metallicity variations alone among early-type galaxies; systematic variations in age, dark matter content, or homology breaking are required. A large-scale study of early-type galaxies at 0.1 < z < 0.6 demonstrates that the SB intercept of the FP, the rest frame (U-V) colour, and the absorption line strengths all evolve passively, thereby implying a high mean formation redshift for the stellar content. The slope of the FP evolves with redshift, which is broadly consistent with systematic age effects occurring along the early-type galaxy sequence. The implication that the least luminous early-type galaxies formed later than the luminous galaxies is discussed in the context of the evolution of the colour-magnitude relation, the Butcher-Oemler effect and hierarchical galaxy formation models.

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