Bibcode
Buitrago, F.; Conselice, C. J.; Epinat, B.; Bedregal, A. G.; Trujillo, I.; Grützbauch, R.
Referencia bibliográfica
Environment and the Formation of Galaxies: 30 years later, Astrophysics and Space Science Proceedings, ISBN 978-3-642-20284-1. Springer-Verlag Berlin Heidelberg, 2011, p. 163
Fecha de publicación:
2011
Número de citas
0
Número de citas referidas
0
Descripción
Massive (stellar mass ≥ 1011 M &sun;) galaxies
at high redshift (z ≥ 1. 5) remain mysterious objects. Their
extremely small sizes (effective radii of 1 - 2 kpc) make them as dense
as globular clusters, whereas in the present day Universe similar mass
systems are large with old and metal-rich stellar populations. In order
to explore this development, we present near-IR IFU observations with
SINFONI@VLT for ten massive galaxies at z ˜ 1. 4 solely selected
by their high stellar mass which allows us to retrieve velocity
dispersions, kinematic maps and dynamical masses. We join this with
imaging from the GOODS NICMOS Survey (GNS), which was carried out by our
group, and which is the largest sample of massive galaxies (80 objects)
at high redshift (1. 7 < z < 3) to date. With these data we show
how their morphology changes, possibly as a result of minor merging
events also seen in the kinematics.