NOAO >   Observing Info >   Approved Programs >   2017A-0103

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Program Information for 2017A-0103


PI: Taran Esplin, Pennsylvania State U., tle918@psu.edu
Address: Astronomy Department, Davey Lab, University Park, USA 16802 United States

CoI: Kevin Luhman, Pennsylvania State U.

Title: Searching for the bottom of the IMF in Ophiuchus

Abstract: The measurement of the minimum mass of the IMF would provide a fundamental test of theories of star and planet formation. To provide better constraints on the shape of the substellar IMF and its minimum mass, we have identified candidate low-mass stars and brown dwarfs in the Ophiuchus star-forming region (150 pc) using optical/IR color- magnitude diagrams and proper motions measured from multi-epoch Spitzer images. In a 2016A program, we obtained optical and near-IR spectra of 136 candidates, 85% of which were confirmed as members. However, we were unable to complete spectroscopy of all candidates due to weather. We propose to use COSMOS %, ARCoIRIS, FLAMINGOS-2, and GNIRS to obtain spectra of the 30 remaining candidates to determine whether they are members of Ophiuchus and to measure their spectral types.

Program Type: Standard/Galactic

Scheduled Nights:
Run 1 (2017A):  CT-4m/COSMOS -- 1n on Jul 04 2017


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NOAO >   Observing Info >   Approved Programs >   2017A-0103

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