Probing the 2-D kinematic structure of early-type galaxies out to 3 effective radii

Robert N. Proctor, Duncan A. Forbes, Aaron J. Romanowsky, Jean P. Brodie, Jay Strader, Max Spolaor, J. Trevor Mendel, Lee Spitler

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

Abstract

We detail an innovative new technique for measuring the 2-D velocity moments (rotation velocity, velocity dispersion and Gauss-Hermite coefficients h3 and h4) using spectra from Keck DEIMOS multi-object spectroscopic observations. The data are used to reconstruct 2-D rotation velocity maps. Here we present data for one of five early-type galaxies whose kinematics we have measured out to ∼3 effective radii (see [1]). From these data 2D kinematic maps are constructed. We show such analyses can provide significant insights into the global kinematic structure of galaxies, and, in some cases, challenge the accepted morphological classification. Our results are of particular importance to studies which attempt to classify galaxies by their kinematic structure within one effective radius, such as the recent definition of fast- and slow- rotator classes by the SAURON project.

Original languageEnglish
Title of host publicationHunting for the Dark: The Hidden Side of Galaxy Formation - Proceedings of the International Conference
EditorsVictor P. Debattista, Cristina C. Popescu
Place of PublicationCollege Park, Maryland
PublisherAmerican Institute of Physics
Pages339-342
Number of pages4
Volume1240
ISBN (Print)9780735407862
DOIs
Publication statusPublished - 2010
Externally publishedYes
EventInternational Conference "Hunting for the Dark: The Hidden Side of Galaxy Formation" - Qawra, Malta
Duration: 19 Oct 200923 Oct 2009

Other

OtherInternational Conference "Hunting for the Dark: The Hidden Side of Galaxy Formation"
CountryMalta
CityQawra
Period19/10/0923/10/09

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