Physical properties of the pre-protostellar core IRc7
Latest update: December 01, 2006
The most extensively studied region of high-mass star formation, and
also the closest, is the Orion BN/KL complex. Nevertheless, it is
still not well understood. The sources that drive extensive outflow
activity in BN/KL and contribute most to its luminosity are still
under debate. The extinction of this region is high and variable,
hiding numerous individual sources at visible and near infrared (IR)
wavelengths. The mid IR imaging reveals that BN/KL is crowded with
compact IR objects, which are presumably embedded protostars and
young stellar objects. One of such objects is IRc7. Images at
different mid IR wavelengths suggest that it is internally heated.
In order to reveal the nature of the source embedded in IRc7, a group of us
preformed detailed radiative transfer modeling of spectral and
imaging data of IRc7. The results strongly suggest that IRc7 belongs
to a very early class of objects with a warm, self-luminous,
12.5 microns image of the Orion BN/KL complex.
Gezari, D.Y., Danchi, W.C., Varosi, F., Elitzur, M., Vinkovic, D., Greenhill, L. J., & Dwek,
E. 2004, Bulletin of the American Astronomical Society, 36, 1519 (ADS)
Gezari, D.Y., Vinkovic, D., Elitzur, M., Danchi, W. C., Varosi, F., Greenhill, L. J., Dwek, E.
"Physical properties of pre-protostellar and
protostellar mid-infrared sources in the Orion BN/KL", in preparation