Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aas...181.1702n&link_type=abstract
American Astronomical Society, 181st AAS Meeting, #17.02; Bulletin of the American Astronomical Society, Vol. 24, p.1147
Astronomy and Astrophysics
Astronomy
Scientific paper
We have obtained long slit spectrophotometric observations in the blue spectral region, 3500 - 5400 Angstroms, of the HH 111 stellar jet using the 2.1m telescope at KPNO. We detect emission of [O III] 5007 Angstroms from within the jet, indicating the existence of high excitation gas. The emission of the knots in stellar jets is characterized by strong, low excitation lines produced by low shock velocities. It is expected, however, that time variability in the driving source could lead to multiple bow shocks or internal working surfaces. The shock velocities associated with such structures could be high enough (> 80 km s(-1) ) to produce [O III] 5007 Angstroms. Significant emission of [O III] 5007 Angstroms was found in condensation L, i.e. halfway between the source and the outermost bow shock V (Reipurth 1989, Nature 340, 42). This strongly suggest the presence of an internal working surface, and time variability of the HH 111 source. ANC research is supported by NSF grant AST-91-14888.
Garnavich Peter M.
Noriega-Crespo Alberto
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