%0 Journal Article
%A Martínez Manso, Jesús
%A Guzmán, Rafael
%A Barro, Guillermo
%A Cenarro, Javier
%A Pérez González, Pablo Guillermo
%A Sánchez Blázquez, Patricia
%A Trujillo, Ignacio
%A Balcells, Marc
%A Cardiel López, Nicolás
%A Hempel, Angela
%A Prieto, Mercedes
%T Velocity Dispersions and Stellar Populations of the Most Compact and Msssive early-Type Galaxies at Redshift similar to 1
%D 2011
%@ 2041-8205
%U https://hdl.handle.net/20.500.14352/44437
%X We present Gran-Telescopio-Canarias/OSIRIS optical spectra of four of the most compact and massive early-type galaxies (ETGs) in the Groth Strip Survey at redshift z similar to 1, with effective radii R-e = 0.5-2.4 kpc and photometric stellarmasses M-star = (1.2-4) x 10(11)M(circle dot). We find that these galaxies have velocity dispersions sigma = 156-236 km s(-1). The spectra are well fitted by single stellar population models with approximately 1 Gyr of age and solar metallicity. We find that (1) the dynamical masses of these galaxies are systematically smaller by a factor of similar to 6 than the published stellarmasses using BRIJK photometry, and (2) when estimating stellarmasses as 0.7xM(dyn), a combination of passive luminosity fading with mass/size growth due to minor mergers can plausibly evolve our objects to match the properties of the local population of ETGs.
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