NOAO >   Observing Info >   Approved Programs >   2017B-0362

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Program Information for 2017B-0362


PI: Danielle Berg, U. of Wisconsin, Milwaukee, bergda@uwm.edu
Address: USA

CoI: Dawn K Erb, U. of Wisconsin, Milwaukee

Title: Physical Conditions in a Very Metal-Poor Starburst Galaxy at z=1.85

Abstract: We propose to observe key rest-frame optical emission lines of the z = 1.85 gravitationally lensed arc SL2SJ021737-051329, one of the lowest metallicity star-forming galaxies yet identified at z > 1. Large observational investments have already been made in this object in order to determine its physical properties, yet fundamental spectroscopic details are missing, preventing the interpretation of these quantities. Due to its magnification factor of ~35, important emission features of this intrinsically faint object can be observed efficiently. Using the [O II], [Ne III], Hdelta, Hgamma, and [O III] emission lines provided by the broad wavelength coverage of the zJ band, we will constrain the ionizing spectrum and reliably measure metallicity using the direct method. These measurements will extend the small sample of lensed galaxies with detailed analysis into the low-mass, low-metallicity regime.

Program Type: Standard/Extragalactic

Scheduled Nights:
Run 1 (2017B):  LBT-SVC/LUCI -- 5hrs


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NOAO >   Observing Info >   Approved Programs >   2017B-0362

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