Constraints on the Assembly and Dynamical Masses of z~2 Galaxies

Details Constraints on the Assembly and Dynamical Masses of z~2 Galaxies Constraints on the Assembly and Dynamical Masses of z~2 Galaxies

Jul 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006hst..prop10924s&link_type=abstract

HST Proposal ID #10924. Cycle 15

Computer Science

Scientific paper

We propose deep NICMOS/NIC2 F160W imaging of seven star-forming galaxies at z~2. These galaxies comprise an entirely unique sample, with not only redshifts measured from optical and near-IR spectra, but also SINFONI/VLT near-IR integral field spectroscopic measurements providing kinematic maps of H-alpha emission out to radii of >=10 kpc. We aim to determine the dynamical masses and evolutionary states of these systems, as part of the larger goal of understanding how mass is assembled in distant galaxies. In order to interpret our novel H-alpha integral field maps in terms of mass, we require detailed knowledge of the structural parameters of our target objects at rest-frame optical wavelengths and on ~1 kpc scales. We want to establish if the mass is distributed in a disk, bulge, or merging sub-units, and if we can detect tidal features associated with a merger. F160W imaging with NICMOS/NIC2 provides the perfect combination of sensitivity and resolution to address these questions, and arrive at the fundamental quantity: the dynamical mass.

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