bok globules are the smallest and simplest molecular clouds capable of forming new stars. past work using the iras data base has helped to identify the nearby globules which show infrared signatures of current embedded star formation. however, the infrared emission from these ysos is quite faint and in the longer far-infrared bands difficult to separate from the thermal emission due to the cool cloud dust. this confusion has prevented accurate determination of the broad band spectral energy distributions (seds) for these low-mass stars. the seds are vital for classifying the young stellar objects into their proper age, luminosity, and circumstellar dust categories. for example, the difference between the protostellar or pure infall class 0 ysos and the later, class i ysos may be due to inclination effects modifying the underlying seds. more accurate, detailed, and less confused seds for the bok globule low-mass star sample are vital. here we seek to obtain iso multi-wavelength photometry and limited imaging in order to ascertain the seds for the ysos in two sub-samples of bok globules: those ysos which have associated co high velocity outflows (and are most like class 0 or i); and those ysos which do not have outflows, and tend to be optically visible (and are likely more like class ii ysos). when combined with our ground-based molecular line spectroscopic maps, 2 micron array, and optical ccd imaging and photometry of these regions, accurate seds from 0.35 to 200 microns will be created and used to classify the ysos and cross-compare the seds of the outflow and non-outflow samples. iso observations will provide 13 important near-, mid-, and far-infrared flux values for each yso, and will additionally image with great detail the photometric aperture regions to accurately assess the number of embedded sources and their local nebular environments.
Instrument
CAM01 , PHT03 , PHT32
Temporal Coverage
1996-06-07T13:44:04Z/1997-05-09T18:55:39Z
Version
1.0
Mission Description
The Infrared Space Observatory (ISO) was the worlds first true orbiting infrared observatory. Equipped with four highly-sophisticated and versatile scientific instruments, it was launched by Ariane in November 1995 and provided astronomers world-wide with a facility of unprecedented sensitivity and capabilities for a detailed exploration of the Universe at infrared wavelengths.
European Space Agency, Dan P. Clemens, 1999, 'LOW LUMINOSITY PROTOSTARS AND YSOS IN BOK GLOBULES: SEDS ENERGY DISTRIBUTIONS AND SOURCE COUNTS OF YSOS IN BOK GLOBULES', 1.0, European Space Agency, https://doi.org/10.5270/esa-ejrd38d
