Highly supersonic bipolar mass ejection from a red giant OH/IR source - OH 0739 - 14

Details Highly supersonic bipolar mass ejection from a red giant OH/IR source - OH 0739 - 14 Highly supersonic bipolar mass ejection from a red giant OH/IR source - OH 0739 - 14

Oct 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...297..702c&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 297, Oct. 15, 1985, p. 702-709.

Astronomy and Astrophysics

Astronomy

77

Herbig-Haro Objects, Radio Sources (Astronomy), Red Giant Stars, Stellar Mass Ejection, Supersonic Flow, Abundance, Astronomical Spectroscopy, Bipolarity, Hydroxyl Emission, Nebulae, Nitrogen, Radial Velocity, Shock Wave Propagation, Spectrophotometry, Stellar Envelopes

Scientific paper

From long-slit spectrophotometry of the bipolar nebula associated with the unusual OH source, OH 0739 - 14, the presence of a blue companion to the M9 III central star was shown and a Herbig-Haro-like knot beyond each nebular lobe was discovered. From differential colors of the lobes and from radial velocities of these knots it was demonstrated that the system inclines its northern lobe in the forward direction. It was also shown that the nebulous knots are shocks being driven into an extensive circumstellar envelope, and that this material is very overabundant in nitrogen, suggesting that it is matter lost from a star of mass greater than 3 solar masses. A model of biconical ejection from a central binary is consistent with the OH observations, and a possible relation of OH 0739 - 14 to the symbiotic stars and to bipolar planetary nebulae is suggested.

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