THE ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 94:615-649, 1994 October

               A K' IMAGING SURVEY OF MOLECULAR OUTFLOW SOURCES

                              KLAUS-WERNER HODAPP
                Institute for Astronomy, University of Hawaii,
                    2680 Woodlawn Drive, Honolulu, HI 96822

                                 ABSTRACT
 
        A K'-band imaging survey with a ~8'x3' field of view of all regions
     associated with CO molecular outflow from the list of Fukai (1989) has
     been conducted.  We present the individual images and describe
     individual nebulous objects and star clusters.  The data, including
     photometric calibration data, are being published as FITS files on a
     CD-ROM.
        The vast majority of all outflow sources are associated with
     nebulosity detectable in K', so such nebulae can be used as tracers
     for very young stars.  We find a significant fraction (one-third) of
     molecular outflow sources to be associated with clusters of young
     stars.  Most of the young embedded clusters show peaks in their K'
     magnitude histograms that, if interpreted as an evolutionary effect,
     indicate average ages of the embedded star population of <1x10^6 yr.

     Subject headings:  infrared: ISM: continuum -- ISM: jets and outflows
                        -- ISM: molecules -- open clusters and associations:
                        general -- stars: formation -- surveys