Jets from pre-main-sequence stars - As 353A and its associated Herbig-Haro objects

Astronomy and Astrophysics – Astrophysics

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Herbig-Haro Objects, Main Sequence Stars, Stellar Mass Ejection, T Tauri Stars, High Resolution, Line Spectra, Red Shift, Stellar Spectra, Stellar Winds

Scientific paper

A new Herbig-Haro object, designated HH 32C, has been discovered near the T Tauri star AS 353A. HH 32C is aligned on the opposite side of AS 353A from two previously known HH objects 32A and B. The emission-line spectrum of HH 32C shows high-velocity blueshifted material moving at speeds (350-400 km s-1) comparable to the high-velocity redshifted material in HH 32A and B. Thus, this represents the second case (after HH 1 and 2 emanating from the Cohen-Schwartz star) in which HH objects clearly trace a high-velocity, well-collimated bipolar outflow from the immediate vicinity of a visible pre-main-sequence object.

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