Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-08-23
Astronomy and Astrophysics
Astrophysics
12 pages, 3 figures
Scientific paper
10.1088/0004-6256/136/5/1852
We present sensitive, high angular resolution ($0\rlap.{''}05$) VLA continuum observations made at 7 mm of the core of the HH 111/121 quadrupolar outflow. We estimate that at this wavelength the continuum emission is dominated by dust, although a significant free-free contribution ($\sim$30%) is still present. The observed structure is formed by two overlapping, elongated sources approximately perpendicular to each other as viewed from Earth. We interpret this structure as either tracing two circumstellar disks that exist around each of the protostars of the close binary source at the core of this quadrupolar outflow or a disk and a jet perpendicular to it. Both interpretations have advantages and disadvantages, and future high angular resolution spectroscopic millimeter observations are required to favor one of them in a more conclusive way.
Anglada Guillem
Reipurth Bo
Rodriguez Luis F.
Torrelles Jose Maria
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