PI: Taran Esplin, Pennsylvania State U.,
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
Run 1 (2017A): CT-4m/COSMOS -- 1n on Jul 04 2017
National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360