High-velocity OH near young stellar objects - L1551

Details High-velocity OH near young stellar objects - L1551 High-velocity OH near young stellar objects - L1551

Jul 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...294l..39m&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 294, July 1, 1985, p. L39-L44. Research supported b

Astronomy and Astrophysics

Astronomy

21

Hydroxyl Radicals, Interstellar Gas, Nebulae, Radio Astronomy, Absorption Spectra, Flow Velocity, Hydroxyl Emission, Line Spectra

Scientific paper

The detection of OH absorption at high velocities in the bipolar outflow associated with the star formation region L1551 is reported. The OH absorption shows the same anisotropic angular distribution as the redshifted and blueshifted CO emission. The OH transitions are markedly subthermal (Tex not greater than 3.8 K), since the radiation that is being absorbed is a background continuum constituted by the cosmic component plus a small Galactic contribution. The absorbing OH appears to trace the part of the bipolar outflow with the highest velocity and lowest density.

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