Orion KL: the hot core that is not a "hot core"
Por:
Zapata L.A., Schmid-Burgk J., Menten K.M.
Publicada:
1 may 2011
Resumen:
We present sensitive high angular resolution submillimeter and millimeter observations of torsionally/vibrationally highly excited lines of the CH3OH, HC3N, SO2, and CH3CN molecules and of the continuum emission at 870 and 1300 mu m from the Orion KL region, made with the Submillimeter Array (SMA). These observations and SMA CO J = 3-2 and J = 2-1 imaging of the explosive flow originating in this region suggest that the molecular Orion "hot core" is a pre-existing density enhancement heated from the outside by the explosive event. Unlike in other hot cores, we do not find any self-luminous submillimeter, radio, or infrared source embedded in the hot molecular gas, nor observe filamentary CO flow structures or "fingers" in the shadow of the hot core pointing away from the explosion center. The low-excitation CH3CN emission shows the typical molecular heart-shaped structure, traditionally named the hot core, and is centered close to the dynamical origin of the explosion. The highest exci
Filiaciones:
Zapata L.A.:
Univ Nacl Autonoma Mexico, Ctr Radioastron & Astrofis, Morelia 58090, Michoacan, Mexico
Schmid-Burgk J.:
Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany
Menten K.M.:
Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany
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