An Integral Field View of Early-Type Galaxies in the Coma Cluster

Details An Integral Field View of Early-Type Galaxies in the Coma Cluster An Integral Field View of Early-Type Galaxies in the Coma Cluster

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21714808s&link_type=abstract

American Astronomical Society, AAS Meeting #217, #148.08; Bulletin of the American Astronomical Society, Vol. 43, 2011

Astronomy and Astrophysics

Astronomy

1

Scientific paper

We present Integral Field Unit (IFU) observations of a sample of 14 early-type galaxies (ETGs) in the Coma Cluster with Oxford's Short Wavelength Integral Field specTrograph (SWIFT) on the 200" Hale Telescope at Palomar. SWIFT is an i- and z-band IFU with R 2 Å (σ 35kms-1). Our sample was selected to evenly sample the full range in velocity dispersions of giant ETGs in the cluster (90km/s to 400km/s). The observations were taken using the 0.235" scale giving a field of view of 11" x 22", covering most galaxies out to one Re. We extract stellar kinematics from the Calcium Triplet (CaT, observed at 8800 Å) using pPXF (Cappellari & Emsellem, 2004) and present velocity and velocity dispersion maps for each of the galaxies in the sample. Using our IFU observations combined with SDSS and, where available, HST photometry we derive: Re, Ie, and σe and from these determine the Fundamental Plane of Coma ETGs. In the near future, we plan to study the fast rotator/slow rotator ratio in Coma, one of the densest and richest local environments for ETGs, to compare with the latest results from the volume limited ALTAS3D survey which lacks such high densities.

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