Observations of BHR71 Using the ESO-VLT
Abstract
Near-infrared observations in both spectroscopy and imaging have been performed in the K-band of the Bok globule BHR71 using the Infrared Spectrometer and Array Camera (ISAAC) on the European Southern Observatory Very Large Telescope UT1. Special attention has been given to an outflow region in a direction within a few hundred AU or less of a protostar. Exposures in excess of 5 hours on the object yield a spectrum of molecular hydrogen emission including a weak continuum. An image of the zone in the S(1) v=1-0 line at 2.121 microns obtained through the 2 arcsecond slit of the spectrometer shows that emission is concentrated into a number of unresolved clumps 50-100 AU in diameter. Shock models have been used to show that these clumps are of high density. For comparative purposes spectra are also presented of a second and much brighter protostar and of a Herbig-Haro object in BHR71.
- Publication:
-
IAU Symposium
- Pub Date:
- 2003
- Bibcode:
- 2003IAUS..221P..40L