Star forming galaxies at z ~ 2 in the GOODS/HDF-N

Details Star forming galaxies at z ~ 2 in the GOODS/HDF-N Star forming galaxies at z ~ 2 in the GOODS/HDF-N

Feb 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003noao.prop..427d&link_type=abstract

NOAO Proposal ID #2003A-0427

Computer Science

Scientific paper

Galaxies at z ~ 2 are a relatively unexplored population, lying between the well-studied epoch of Lyman break galaxies (LBGs, z ~ 3) and the bounds of traditional magnitude-limited redshift surveys (z ~ 1). The UV-optimized LRIS-B spectrograph is opening this redshift range for systematic study. Galaxies at z ~ 2 are an important key to understanding high redshift star formation, in part thanks to forthcoming SIRTF observations at 24(micron) from the Great Observatories Origins Deep Survey (GOODS). The relation between UV-bright LBGs and dust-obscured, ultraluminous SCUBA starbursts remains controversial, and it is unclear where the bulk of high redshift star formation takes place. GOODS 24(micron) observations are designed to measure redshifted 7.7(micron) PAH emission from ``ordinary'' LBGs at z ~ 2, probing the obscured component of star formation in these abundant objects. Moreover, at z ~ 2 many nebular line diagnostics of star formation and reddening are available for near- infrared spectroscopy. A galaxy sample at z ~ 2 will fill in the timeline for studies of galaxy evolution using GOODS data, including stellar population/mass from SIRTF/IRAC, galaxy morphology from multiband HST/ACS observations (now in progress), and the scaling of clustering with halo abundance, an important test of hierarchical structure theory.

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