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28 March 2024
 
  » arxiv » 1510.6411

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Next Generation Very Large Array Memo No. 8 Science Working Group 3: Galaxy Assembly through Cosmic Time
Caitlin M. Casey ; Jacqueline A. Hodge ; Mark Lacy ; Christopher A. Hales ; Amy Barger ; Desika Narayanan ; Chris Carilli ; Katherine Alatalo ; Elisabete da Cunha ; Bjorn Emonts ; Rob Ivison ; Amy Kimball ; Kotaro Kohno ; Eric Murphy ; Dominik Riechers ; Mark Sargent ; Fabian Walter ;
Date 21 Oct 2015
AbstractThe Next-Generation Very Large Array (ngVLA) will be critical for understanding how galaxies are built and evolve at the earliest epochs. The sensitivity and frequency coverage will allow for the detection of cold gas and dust in ’normal’ distant galaxies, including the low-J transitions of molecular gas tracers such as CO, HNC, and HCO+; synchrotron and free-free continuum emission; and even the exciting possibility of thermal dust emission at the highest (z~7) redshifts. In particular, by enabling the total molecular gas reservoirs to be traced to unprecedented sensitivities across a huge range of epochs simultaneously -- something no other radio or submillimeter facility will be capable of -- the detection of the crucial low-J transitions of CO in a diverse body of galaxies will be the cornerstone of ngVLA’s contribution to high-redshift galaxy evolution science. The ultra-wide bandwidths will allow a complete sampling of radio SEDs, as well as the detection of emission lines necessary for spectroscopic confirmation of elusive dusty starbursts. The ngVLA will also deliver unique contributions to our understanding of cosmic magnetism and to science accessible through microwave polarimetry. Finally, the superb angular resolution will move the field beyond detection experiments and allow detailed studies of the morphology and dynamics of these systems, including dynamical modeling of disks/mergers, determining the properties of outflows, measuring black hole masses from gas disks, and resolving multiple AGN nuclei. We explore the contribution of a ngVLA to these areas and more, as well as synergies with current and upcoming facilities including ALMA, SKA, large single-dish submillimeter observatories, GMT/TMT, and JWST.
Source arXiv, 1510.6411
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