Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...437..296b&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 437, no. 1, p. 296-304
Astronomy and Astrophysics
Astronomy
34
Infrared Astronomy, Interstellar Gas, Molecular Gases, Plasma Jets, Pre-Main Sequence Stars, Shock Wave Interaction, Star Formation, Astronomical Spectroscopy, Carbon Monoxide, Hydrogen, Infrared Spectra, Molecular Spectra, Silicon Oxides
Scientific paper
We present observations of the shock tracers H2 and SiO around the young stellar object IRAS 03282+3035. This unusual low-luminosity (L approximately = 2 solar luminosity) source drives a strong highly collimated CO outflow, and it is one of the youngest stellar objects known so far. The near-infrared H2 emission, tracing 2000 K gas, comes from extremely high velocity CO bullets along the axis of the blueshifted lobe of the outflow. The millimeter SiO emission, tracing roughly 100 K gas, arises from lower velocity material at the end of the outflow lobe. The lack of high-temperature and high-velocity gas at the end of the outflow lobe indicates there is no not bow shock at the outflow termination. In the context of current jet models this appears to rule out a bow shock driven by a steady state jet. Possible explanations for the structure include a time-dependent jet or a jet dominated by turbulent entrainment.
Bachiller Rafael
Beichman Charles Arnold
Jarrett Thomas
Martín-Pintado Jesús
Terebey Susan
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