Low-Mass Visual Companions to Young Spectroscopic Binaries

Astronomers' knowledge of higher order multiplicity in young spectroscopic binaries is mostly anecdotal. However, surveys have found that most short-period, main sequence spectroscopic binaries are associated with companions. We present incremental results from our diffraction-limited adaptive optics imaging program to survey all pre-main sequence, spectroscopic binaries for tertiary companions down to delta(mag)=5 at separations >1" and delta(mag)=2 at >0.04'. We will explore the timescale for angular momentum evolution by comparing our results to the results from surveys of main sequence binaries in the literature.