A Pair of Twisted Jets of Ionized Iron from L 1551 IRS 5

Details A Pair of Twisted Jets of Ionized Iron from L 1551 IRS 5 A Pair of Twisted Jets of Ionized Iron from L 1551 IRS 5

Feb 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000pasj...52...81i&link_type=abstract

Publications of the Astronomical Society of Japan, v.52, p.81.

Astronomy and Astrophysics

Astronomy

31

Infrared: Stars, Ism: Jets And Outflows, Stars: Formation

Scientific paper

High-resolution near-infrared J-band imaging with the Subaru Telescope has demonstrated, for the first time from the ground, two independent jets emanating from the protostar L 1551 IRS 5. Successive near-infrared spectroscopy has revealed that the jet emission is dominated by [Fe II] lines in the J- and H-bands. While the visual-extinction estimated from the [Fe II] line ratios reaches more than 20 mag in the close vicinity of IRS 5, it decreases rapidly at ~ 1'' from IRS 5 and remains constant around 7 mag at larger distances. The electron density in the jets is estimated to be 106 cm-3 near IRS 5 and is 104 to 105 cm-3 in their outer section. The twisted appearance of the jets, with bright knots especially prominent in the northern jet, is similar to the R-band jets observed with the Hubble Space Telescope. These results suggest that the twisted structure and bright emission knots are intrinsic to the jets and are not due to a spatial variation of the extinction.

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