Bibcode
Nigoche-Netro, A.; Aguerri, J. A. L.; Lagos, P.; Ruelas-Mayorga, A.; Sánchez, L. J.; Muñoz-Tuñón, C.; Machado, A.
Bibliographical reference
Astronomy and Astrophysics, Volume 534, id.A61
Advertised on:
10
2011
Journal
Citations
14
Refereed citations
13
Description
Context. It has been reported that the intrinsic dispersion at constant
magnitude in the structural relations of early-type galaxies is a useful
tool to study the universality of these structural relations, that is to
say, to study whether the structural relations depend on luminosity,
wavelength, redshift, and/or environment. Aims: We study the
intrinsic dispersion at approximately constant magnitude in the
Faber-Jackson relation as a function of luminosity, mass, and redshift.
Methods: We use a sample of approximately 90 000 early-type
galaxies from the Sloan Digital Sky Survey (SDSS-DR7) spanning a
magnitude range of 7 mag in both g and r filters. We calculate the
intrinsic dispersion in the Faber-Jackson relation at approximately
constant magnitude and compare this at different luminosities, masses,
and redshifts. Results: The main results are the following: i)
the intrinsic dispersion in the Faber-Jackson relation depends on the
luminosity, mass, and redshift; ii) the distribution for brighter and
more massive galaxies has smaller intrinsic dispersion than that for
fainter and less massive galaxies; iii) the distribution of bright and
massive galaxies at higher redshift has smaller intrinsic dispersion
than similar galaxies at low redshift. Conclusions: Comparisons
of the results found in this work with recent studies from the
literature make us conclude that the intrinsic dispersion in the
Faber-Jackson relation could depend on the history of galaxies, in other
words, the intrinsic dispersion could depend on the number and nature of
transformation events that have affected the galaxies during their life
times, such as collapse, accretion, interaction, and merging.
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