NOAO >   Observing Info >   Approved Programs >   2015A-0175

Small NOAO Logo

Proposal Information for 2015A-0175


PI: Taran Esplin, Pennsylvania State University, tle918@psu.edu
Address: Astronomy Department, 525 Davey Lab, University Park, Pennsylvania 16802, United States

CoI: Kevin Luhman, Pennsylvania State University
CoI: Eric Mamajek, University of Rochester

Title: Searching for the Bottom of the Initial Mass Function

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 minimum of the IMF, we are using colors and proper motions measured from deep images from the Hubble Space Telescope, the Spitzer Space telescope, and ground-based telescopes to search for low-mass brown dwarfs in the Chamaeleon I star- forming region (2 Myr, 160 pc). In these data, we have identified 13 promising candidates that should have masses as low as 5 Jupiter masses if they are members, which would make them some of the least massive known brown dwarfs. We propose to use FLAMINGOS-2 to obtain near-infrared spectra of these candidates to determine whether they are young brown dwarfs. We also propose to use DECam to obtain izY images that are 2 mag deeper than our existing DECam data, which will allow us to extend our identification of brown dwarfs below 5 Jupiter masses. [This proposal contains observations with Gemini and CTIO. We are submitting one version of the proposal to both NOAO and Gemini.]


National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360



NOAO >   Observing Info >   Approved Programs >   2015A-0175

noaoprop-help@noao.edu

Small NOAO Logo