James M. De Buizer, Mark R. Morris, E. E. Becklin, Hans Zinnecker, Terry L. Herter, Joseph D. Adams, Ralph Y. Shuping, William D. Vacca
The BN/KL region of the Orion Nebula is the nearest region of high mass star
formation in our galaxy. As such, it has been the subject of intense
investigation at a variety of wavelengths, which have revealed it to be
brightest in the infrared to sub-mm wavelength regime. Using the newly
commissioned SOFIA airborne telescope and its 5-40 micron camera FORCAST,
images of the entire BN/KL complex have been acquired. The 31.5 and 37.1 micron
images represent the highest resolution observations (<=4") ever obtained of
this region at these wavelengths. These observations reveal that the BN object
is not the dominant brightness source in the complex at wavelengths >31.5
microns, and that this distinction goes instead to the source IRc4. It was
determined from these images and derived dust color temperature maps that IRc4
is also likely to be self-luminous. A new source of emission has also been
identified at wavelengths >31.5 microns that coincides with the northeastern
outflow lobe from the protostellar disk associated with radio source I.
View original:
http://arxiv.org/abs/1202.4802
No comments:
Post a Comment