Narrow-band imaging and velocity maps of young stellar objects - Initial results

Details Narrow-band imaging and velocity maps of young stellar objects - Initial results Narrow-band imaging and velocity maps of young stellar objects - Initial results

Oct 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...285l..71m&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 285, Oct. 15, 1984, p. L71-L73.

Astronomy and Astrophysics

Astrophysics

20

Astronomical Maps, Astronomical Photography, Pre-Main Sequence Stars, Radial Velocity, Stellar Envelopes, T Tauri Stars, Charge Coupled Devices, Emission Spectra, Narrowband, Stellar Winds

Scientific paper

The first trials of a new technique, designed to map low-excitation ionized gas surrounding young stellar objects, are reported. The region surrounding the T Tau stars HL Tau and XZ Tau, that near HH 101, and that near IRS 5 in L1551 have been imaged through a narrow-band (4.7 A FWHM) forbidden S II filter; three-phase CCD chip was used as the detector. By tilting the narrow-band filter, it is possible to vary the wavelength of peak transmission and thus to detect high-velocity radial flows as well as map the morphology of the excited gas near these young stars. Evidence of an apparently helical outflow is found for HH 101. Redshifted gas appears to extend southward from HL Tau toward HH 30; a blueshifted jet extends northeastward of HL Tau. A series of forbidden S II knots is seen to extend along a jet directed southwestward from the infrared source IRS 5; the knot chain appears to delineate a blueshifted outflow that decelerates as it recedes from IRS 5.

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