Joseph D. Adams, Terry L. Herter, Mayra Osorio, Enrique Macias, S. Thomas Megeath, William J. Fischer, Babar Ali, Nuria Calvet, Paola D'Alessio, James M. De Buizer, George E. Gull, Charles P. Henderson, Luke D. Keller, Mark R. Morris, Ian S. Remming, Justin Schoenwald, Ralph Y. Shuping, Gordon Stacey, Thomas Stanke, Amelia Stutz, William Vacca
We examine eight young stellar objects in the OMC-2 star forming region based
on observations from the SOFIA/FORCAST early science phase, the Spitzer Space
Telescope, the Herschel Space Observatory, 2MASS, APEX, and other results in
the literature. We show the spectral energy distributions of these objects from
near-infrared to millimeter wavelengths, and compare the SEDs with those of
sheet collapse models of protostars and circumstellar disks. Four of the
objects can be modelled as protostars with infalling envelopes, two as young
stars surrounded by disks, and the remaining two objects have double-peaked
SEDs. We model the double-peaked sources as binaries containing a young star
with a disk and a protostar. The six most luminous sources are found in a dense
group within a 0.15 x 0.25 pc region; these sources have luminosities ranging
from 300 L_sun to 20 L_sun. The most embedded source (OMC-2 FIR 4) can be fit
by a class 0 protostar model having a luminosity of ~50 L_sun and mass infall
rate of ~10^-4 solar masses per year.
View original:
http://arxiv.org/abs/1202.4445
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