  We report infrared spectroscopy of the unusual eclipsing pre-main sequence
object KH 15D, obtained using NIRSPEC on Keck II. During eclipse, observations
using low spectral resolution (1000) reveal the presence of prominent molecular
hydrogen emission in 5 lines near 2 microns. The relative line strengths are
consistent with thermal excitation at T = 2800 +/-300K. Observations out of
eclipse, at both low and high spectral resolution (20,000), show reduced
contrast with the stellar continuum. The change in contrast for the strongest
line, 1-0 S(1), is consistent with an approximately constant emission line
superposed on a variable stellar continuum. Emission in the 1-0 S(1) line is
observed to extend by more than 4 arc-sec both east and west of the stellar
point spread function (more than 3000 AU). Observed at high spectral
resolution, the velocity and intensity structure of the 1-0 S(1) profile are
both asymmetric. East of the stellar PSF (by 1.1 - 2.3 arc-sec) the emission is
blueshifted (-63 km/sec), and has significantly greater intensity than the
marginally redshifted component (+2 km/sec, consistent with zero) which
dominates west of the stellar PSF. The spatial extent of the emission, and the
excitation temperature, suggest shock-excitation of ambient gas by a bipolar
outflow from the star and/or disk. However, it is difficult to account for the
observed radial velocity unless the outflow axis is inclined significantly to
the plane of the sky.
