NOAO >   Observing Info >   Approved Programs >   2020A-0032

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Program Information for 2020A-0032


PI: Vinicius Placco, U. of Notre Dame, vmplacco@gmail.com
Address: Physics Department, 334 Nieuwland Science Hall, Notre Dame, Indiana 46556 USA

Title: Identification of Low-Metallicity Stars from Narrow-Band Photometry

Abstract: We propose to measure stellar atmospheric parameters (Teff, logg, and [Fe/H]) and carbon-abundance ratios, [C/Fe], for a sample of $sim 100$ metal-poor star candidates, by obtaining medium-resolution COSMOS spectroscopy. These stars were selected based on narrow band photometry from the S-PLUS survey data. With estimated Teff, logg, [Fe/H], and [C/Fe] in hand, derived by our well-tested spectroscopic analysis pipeline, we will be able to test our parameter estimates derived from photometry, and improve our determinations for future data releases. If these candidates are confirmed to be low-metallicity, high- resolution spectroscopy can be carried out with Gemini/GHOST and SOAR Steles. Increasing numbers of spectroscopically confirmed metal-poor stars provide essential constraints on Galactic chemical evolution models and early nucleosynthesis predictions from Population III supernova explosions.

Program Type: Standard/Galactic

Scheduled Nights:
Run 1 (2020A):  CT-4m/COSMOS -- 5n on Jun 03 - Jun 07 2020


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NOAO >   Observing Info >   Approved Programs >   2020A-0032

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